Exhibit 10.32


                               SEVERANCE AGREEMENT


         THIS AGREEMENT, dated as of the 26th day of May, 1999, is by and
between Express Scripts, Inc., a Delaware corporation (hereinafter referred to
as the "Company"), and Mark O. Johnson (hereinafter referred to as the
"Executive").

                                    RECITALS:

     A. The Board of Directors of the Company (the "Board") considers it
essential to the best interests of the Company and its stockholders that its key
management personnel be encouraged to remain with the Company and its
subsidiaries and to continue to devote full attention to the Company's business
and has determined that appropriate steps should be taken to reinforce and
encourage the continued attention and dedication of its key management
personnel.

     B. The Executive currently serves as a Senior Vice President of the Company
and his or her services and knowledge are valuable to the Company in connection
with the management of one or more of the Company's principal businesses,
subsidiaries, divisions or functions.

     C. The Board believes the Executive has made and is expected to continue to
make valuable contributions to the productivity and profitability of the Company
and its subsidiaries.

     D. The Board believes it imperative that the Company and the Board be able
to rely upon the Executive to continue in his or her position, and that the
Company and the Board be able to receive and rely upon his or her advice, if so
requested, as to the best interests of the Company and its stockholders without
concern that he or she might be distracted by the personal uncertainties and
risks created by events that are not within such person's control, and to
encourage the Executive's full attention and dedication to the Company.

     E. The Board, upon the recommendation of the Compensation Committee of the
Company (the "Compensation Committee"), has approved this Agreement and
authorized and directed its execution and delivery on behalf of the Company.

                              TERMS AND CONDITIONS:

     NOW, THEREFORE, to assure the Company and its subsidiaries that it will
have the continued, undivided attention, dedication and services of the
Executive and the availability of the Executive's advice and counsel, and to
induce the Executive to remain in the employ of the Company and its
subsidiaries, and for other good and valuable consideration, the adequacy and
sufficiency of which are hereby acknowledged, the Company and the Executive
agree as follows:

     1. Certain Definitions

     For purposes of this Agreement, the following terms shall have the
following meanings:


     (a) "Cause" means:

          (i) any act or acts by the Executive, whether or not in connection
     with his or her employment by the Company, constituting a felony under
     applicable law;

          (ii) any act or acts of gross dishonesty or gross misconduct on the
     Executive's part which result or are intended to result directly or
     indirectly in gain or personal advantage or enrichment at the expense of
     the Company or its subsidiaries; or

          (iii) any violation by the Executive of his or her obligations to the
     Company or its subsidiaries which violation is demonstrably willful and
     deliberate on the Executive's part and which results in material damage to
     the business or reputation of the Company or its subsidiaries.

          Notwithstanding the foregoing, the employment of the Executive shall
     in no event be deemed to have been terminated by the Company for "Cause" if
     termination of his or her employment by the Company took place: (A) as the
     result of bad judgment or negligence on the part of the Executive other
     than gross negligence; (B) because of an act or omission believed by the
     Executive in good faith to have been in or not opposed to the interests of
     the Company and its subsidiaries; (C) for any act or omission in respect of
     which a determination could properly be made that the Executive met the
     applicable standard of conduct prescribed for indemnification or
     reimbursement or payment of expenses under the Certificate of Incorporation
     or bylaws of the Company or the laws of the state of incorporation of the
     Company, in each case as in effect at the time of such act or omission; (D)
     as the result of an act or omission which occurred more than twelve (12)
     calendar months prior to the Executive's having been given Notice of
     Termination (as defined below) for such act or omission unless the
     commission of such act or omission could not at the time of such commission
     or omission have been known to the President of the Company or to a member
     of the Board (other than the Executive, if he or she is then a member of
     the Board), in which case more than twelve (12) calendar months from the
     date that the commission of such act or such omission was or could
     reasonably have been so known; or (E) as the result of a continuing course
     of action which commenced and was or could reasonably have been known to
     the President of the Company or to a member of the Board (other than the
     Executive) more than twelve calendar months prior to the Executive having
     been given Notice of Termination.

     (b) "Change in Control" means and shall be deemed to have occurred upon:

          (i) the acquisition at any time by a "person" or "group" (as that term
     is used in Sections 13(d) and 14(d)(2) of the Securities Exchange Act of
     1934, as amended (the "Exchange Act")) (excluding, for this purpose, the
     Company or any subsidiary or any employee benefit plan of the Company or
     any subsidiary) of beneficial ownership (as defined in Rule 13d-3 under the
     Exchange Act), directly or indirectly, of securities representing 30% or
     more of the combined voting power in the election



     of directors of the then-outstanding securities of the Company or any
     successor of the Company;

          (ii) when individuals who, as of the date hereof, constitute the Board
     (the "Incumbent Board") cease for any reason to constitute at least a
     majority of the Board, provided that any person who becomes a director
     subsequent to the date hereof whose election or nomination for election by
     the Company's stockholders was approved by a vote of at least a majority of
     the directors then comprising the Incumbent Board (other than an individual
     whose initial assumption of office is in connection with an actual or
     threatened election contest relating to the election of the directors of
     the Company, as such terms are used in Rule 14a-11 of Regulation 14A under
     the Exchange Act) shall be, for purposes of this definition, considered as
     though such person were a member of the Incumbent Board;

          (iii) approval by the stockholders of the Company of the liquidation
     of the Company or any sale or disposition, or series of related sales or
     dispositions, of 50% or more of the assets or earning power of the Company;
     or

          (iv) approval by the stockholders of the Company and consummation of
     any merger or consolidation or statutory share exchange to which the
     Company is a party and as a result of which the persons who were
     stockholders of the Company immediately prior to the effective date of the
     merger or consolidation or statutory share exchange shall have beneficial
     ownership of less than 50% of the combined voting power in the election of
     directors of the surviving corporation following the effective date of such
     merger or consolidation or statutory share exchange.

          Notwithstanding the foregoing, a "Change in Control" shall not include
     (A) the sale or other transfer of beneficial ownership of Class B Common
     Stock of the Company by NYLIFE Healthcare Management, Inc. to (or any
     acquisition of such beneficial ownership by) an affiliate thereof,
     including, without limitation, New York Life Insurance Company or any
     holding company formed by any such affiliate, or (B) an isolated sale,
     spin-off, joint venture or other business combination by the Company, which
     involves one or more divisions or subsidiaries of the Company and is
     approved by a majority vote of the Incumbent Board.

     (c) "Good Reason" means the occurrence of any one or more of the following:

          (i) Any material breach by the Company of any of the provisions of
     this Agreement or any other agreement between the Company and the Executive
     or any material failure by the Company to carry out any of its obligations
     hereunder or thereunder, in any such case, after receipt of written notice
     of such breach or failure from the Executive and the failure by the Company
     to cure such breach or failure within fifteen (15) business days after
     receipt of such notice;

          (ii) The Company's requiring the Executive to be based at any office
     or location more than 50 miles from his or her then-current office or
     location at which



     he or she is then based, except for travel reasonably required in the
     performance of the Executive's responsibilities to the extent substantially
     consistent with the Executive's business travel obligations prior to such
     required relocation, either (A) within three (3) years of any prior
     relocation at the Company's request (other than a relocation in connection
     with his or her initial employment by the Company) or (B) within two (2)
     years following any Change in Control;

          (iii) The assignment to the Executive of any duties inconsistent in
     any material adverse respect with his or her position, authority or
     responsibilities with the Company and its subsidiaries immediately prior to
     such assignment, or any other material adverse change in such position,
     including titles, authority, or responsibilities, as compared with the
     Executive's position immediately prior to such change;

          (iv) A material reduction by the Company in the amount of the
     Executive's base salary or target annual bonus compensation paid or payable
     as compared to that which was paid or made available to the Executive
     immediately prior to such reduction; or

          (v) The failure by the Company to continue to provide the Executive
     with substantially similar perquisites or benefits the Executive in the
     aggregate enjoyed under the Company's benefit programs (other than
     long-term incentive compensation programs), such as any of the Company's
     pension, savings, vacation, life insurance, medical, health and accident,
     or disability plans in which he or she was participating at the time of any
     such discontinuation (or, alternatively, if such plans are amended,
     modified or discontinued, substantially similar equivalent benefits thereto
     in the aggregate), or the taking of any action by the Company which would
     directly or indirectly cause such benefits to be no longer substantially
     equivalent in the aggregate to the benefits in effect immediately prior to
     taking such action; provided, that any amendment, modification or
     discontinuation of any plans or benefits referred to in this Subsection (v)
     that generally affect substantially all domestic salaried employees of the
     Company shall not be deemed to constitute Good Reason.

     2. Obligations of the Company Upon Termination; Conditions to the Company's
     Obligations; Acknowledgments and Agreements of the Executive

     (a) Death or Disability. If the Executive's employment is terminated by
     reason of the Executive's death or disability, this Agreement shall
     terminate without further obligations to the Executive's legal
     representatives or the Executive, as the case may be, under this Agreement.
     For the purposes of this Agreement, "disability" shall have the same
     definition as contained in any long-term disability insurance plan or
     program of the Company in which the Executive is participating at the time
     of termination of his or her employment. If the Executive is not so
     participating or is participating in more than one such plan or program at
     the time of termination, "disability" means the Executive's inability by
     reason of illness or other physical or mental disability to perform the
     principal duties required by the position held by the Executive at the
     inception of such illness or disability for any consecutive 180-day period.
     A determination of "disability" shall be subject to the certification of a
     qualified



     medical doctor agreed to by the Company and the Executive or, in the
     Executive's incapacity to designate a doctor, the Executive's legal
     representative. If the Company and the Executive cannot agree on the
     designation of a doctor, each party shall nominate a qualified medical
     doctor and the two doctors shall select a third doctor; the third doctor
     shall make the determination as to "disability."

     (b) Termination by the Company for Cause; Termination by the Executive
     Other Than for Good Reason. If the Executive's employment shall be
     terminated by the Company for Cause or by the Executive other than for Good
     Reason, this Agreement shall terminate without further obligations to the
     Executive on the Termination Date.

     (c) Termination by the Company Other Than for Cause; Termination by the
     Executive for Good Reason. If the Company shall terminate the Executive's
     employment other than for Cause, or the employment of the Executive shall
     be terminated by the Executive for Good Reason, the Executive shall be
     entitled, subject to Sections 2(e) and 4 hereof, to a severance benefit in
     an amount equal to (i) twelve (12) times the monthly base salary being paid
     to the Executive immediately prior to the Termination Date plus (ii) an
     amount equal to the product of (x) the Executive's Bonus Potential for the
     year in which the Termination Date occurs (the "Termination Year")
     multiplied by (y) the average percentage of the Bonus Potential earned by
     the Executive for the three (3) full years immediately preceding the
     Termination Year (or such shorter period if the Executive was employed by
     the Company for less than three (3) full years and received or was eligible
     to receive a bonus during such period), which product shall be prorated for
     the portion of the Termination Year in which the Executive was employed by
     the Company. For purposes of this Agreement, "Bonus Potential" shall mean
     the maximum bonus amount the Executive could receive under the terms of his
     or her annual bonus letter or, if no bonus letter is issued, otherwise in
     accordance with the terms of the Company's bonus plan then in effect for
     all senior executives of the Company. If a maximum bonus amount is not
     determinable, then the Compensation Committee shall determine in good faith
     the amount of the bonus the Executive could reasonably have been expected
     to have received for the Termination Year, and such determination shall be
     final and binding on all parties; provided that, for purposes of this
     Agreement, if a maximum bonus amount is not determinable, in no event shall
     such amount be less than the average of the actual bonus payment received
     by the Executive in respect of the three (3) full years immediately
     preceding the Termination Year (or such shorter period if the Executive was
     employed by the Company for less than three (3) years).

     (d) Payments in Installments. The Company shall pay the severance benefit
     required under Section 2(c) hereof, without interest thereon, in four (4)
     substantially equal quarterly installments, payable on the first day of
     each calendar quarter, with the first such installment payable in the first
     full calendar quarter commencing twenty-eight (28) days after the date on
     which the Executive complies with Section 2(e)(i) and, if applicable,
     Section 2(e)(ii) below, subject to applicable withholding and employment
     taxes.

     (e) Conditions to Receipt of Payments. As a condition to the Company's
     obligation to pay the severance benefit hereunder, the Executive must
     deliver to the Company the following:


               (i) No later than thirty (30) days after the Termination Date, a
          general release and acknowledgment in the form attached hereto as
          Exhibit A (the "General Release"); and

               (ii) An acknowledgement and agreement in a form reasonably
          satisfactory to the Company that the noncompetition provisions of the
          Nondisclosure and Noncompetition Agreement between the Executive and
          the Company, in the form previously executed by the Executive, will be
          effective for a period of one (1) year commencing on the Termination
          Date, notwithstanding the fact that the Executive's employment with
          the Company may have been terminated by the Company other than for
          Cause; provided, however, that the foregoing acknowledgment and
          agreement shall not be required if the Termination Date occurs within
          eighteen (18) months following a Change of Control.

          (f) Acknowledgements of the Executive. The Executive acknowledges and
     agrees that:

               (i) The provisions of Section 2(e) are reasonable and enforceable
          because, among other things, (1) the Executive will be receiving
          compensation under this Agreement and (2) there are many other areas
          in which, and companies for which, the Executive could work in view of
          the Executive's background, and Section 2(e) therefore does not impose
          any undue hardship on the Executive;

               (ii) The provisions of the Nondisclosure and Noncompetition
          Agreement, including by way of its applicability hereunder in the
          event of a termination of the Executive's employment without Cause,
          are reasonable and enforceable in view of the Company's legitimate
          interests in protecting its confidential information and customer
          goodwill and the limitations contained therein on the duration and
          geographic scope of, and activities covered by, such provisions; and

               (iii) In deciding to sign this Agreement, the Executive has not
          relied upon any statements or promises by the Company other than those
          set forth in this Agreement, and the Executive understands that this
          Agreement contains the entire agreement between the parties.

          (g) Additional Agreements.

               (i) The Executive represents that he or she has not, and agrees
          that he or she will not, in any way disparage the Company or its
          current and former officers, directors and employees, or make or
          solicit any comments, statements, or the like to the media or to
          others that may be considered to be derogatory or detrimental to the
          good name or business reputation of any of the aforementioned parties
          or entities;

               (ii) The Executive further agrees that he or she will not at any
          time discuss any matter concerning the Company with anyone adverse or
          potentially adverse to the Company on any matter, including, without
          limitation, employment claims or customer claims, without the prior
          written consent of the Company. However, if



          required by a governmental regulatory agency or self-regulatory agency
          to provide testimony or information regarding the Company, the
          Executive will cooperate with said regulatory agency. If compelled to
          testify by a validly served subpoena or by regulatory authority, the
          Executive will testify truthfully as to all matters concerning his or
          her employment with the Company. If a regulatory agency or
          self-regulatory agency contacts the Executive regarding the Company or
          if the Executive receives a subpoena or other court or legal process
          relating in any way to the Company, or any present or former Company
          customer or employee, the Executive immediately will give the Company
          prior written notice and shall make himself or herself available to be
          interviewed concerning the subject matter of such contact; and

               (iii) The Executive agrees to cooperate with and make himself or
          herself readily available to the Company or its General Counsel, as
          the Company may reasonably request, to assist it in any matter,
          including litigation or proceedings or potential litigation or
          proceedings, over which the Executive may have knowledge, information
          or expertise, provided, however, that the Company shall pay the
          reasonable out-of-pocket expenses of the Executive in performing his
          or her obligations under this Section 2(g)(iii).

     3. Notice of Termination

         For purposes of this Agreement, any termination of the Executive's
employment by the Company as contemplated by Sections 2(a) or 2(b) hereof or by
the Executive as contemplated by Section 2(c) hereof shall be communicated by
written "Notice of Termination" to the other party hereto. Any "Notice of
Termination" shall set forth (a) the effective date of termination (for purposes
of determining the Executive's entitlement to benefits hereunder), which shall
not be less than fifteen (15) or more than thirty (30) days after the date the
Notice of Termination is delivered (the "Termination Date"); (b) the specific
provision in this Agreement relied upon; and (c) in reasonable detail the facts
and circumstances claimed to provide a basis for such termination.
Notwithstanding the foregoing, if within fifteen (15) days after any Notice of
Termination is given, the party receiving such Notice of Termination notifies
the other party that a good faith dispute exists concerning the termination, the
effective date of termination for purposes of determining the Executive's
entitlement to benefits under this Agreement shall be the date on which the
dispute is finally determined in accordance with the provisions of Section 12
hereof. In the case of any good faith dispute as to the Executive's entitlement
to benefits under this Agreement resulting from any termination by the Company
for which the Company does not deliver a Notice of Termination, the effective
date of termination for purposes of determining the Executive's entitlement to
benefits under this Agreement shall be the date on which the dispute is finally
determined in accordance with the provisions of Section 12 hereof. If the
parties do not dispute the Executive's entitlement to benefits hereunder, the
effective date of termination shall be the Termination Date.

     4. Mitigation

         The Executive is not required to seek other employment or otherwise
mitigate the amount of any payments to be made by the Company pursuant to this
Agreement; provided, however, that any amounts earned by the Executive from
employment with another employer prior to the final payment by the Company of
amounts payable hereunder will reduce any amounts or benefits due



the Executive pursuant to this Agreement on a dollar-for-dollar basis; provided,
further, however, that no such reduction shall be required or made in the event
the Termination Date occurs within eighteen (18) months following a Change in
Control.

     5. Breach

         In the event of a breach by the Executive of any of the Executive's
agreements in Section 2(e) or Section 2(g) hereof (including a breach of any
agreements in the General Release or in the Nondisclosure and Noncompetition
Agreement), the Executive shall pay to the Company all amounts previously paid,
allocated, accrued or provided by the Company to the Executive pursuant to this
Agreement and the Company shall be entitled to discontinue the future payment,
allocation, accrual or provision of any amounts or benefits under this
Agreement. The Executive recognizes and agrees that it is the intent of the
parties that neither this Agreement nor any of its provisions shall be construed
to adversely affect any rights or remedies that the Company would have had,
including, without limitation, the amount of any damages for which it could have
sought recovery, had this Agreement not been entered into. Without limiting the
generality of the foregoing, nothing in this Section 5 or any other provision of
this Agreement shall limit or otherwise affect the Company's right to seek legal
or equitable remedies it may otherwise have, or the amount of damages for which
it may seek recovery, resulting from or arising out of statutory or common law
or any Company policies relating to fiduciary duties, confidential information
or trade secrets.

     6. Successors

         (a) The Company shall require any successor (whether direct or
indirect, by purchase, merger, consolidation or otherwise) to all or
substantially all of the business and/or assets of the Company, by agreement to
assume expressly and agree to perform this Agreement in the same manner and to
the same extent that the Company would be required to perform it if no such
succession had taken place. For purposes of this Agreement, "Company" shall mean
the Company as hereinbefore defined and any successor to its business and/or
assets as aforesaid.

         (b) This Agreement shall inure to the benefit of and be enforceable by
the Executive's personal or legal representatives, executors, administrators,
successors, heirs, distributees, beneficiaries, devises and legatees. If the
Executive should die while any amounts are payable to him or her hereunder, all
such amounts, unless otherwise provided herein, shall be paid in accordance with
the terms of this Agreement to the Executive's devisee, legatee, beneficiary or
other designee or, if there be no such designee, to the Executive's estate.

     7. Notices

         For the purposes of this Agreement, notices and all other
communications provided for herein shall be in writing and shall be deemed to
have been duly given (i) on the date of delivery if delivered by hand, (ii) on
the date of transmission, if delivered by confirmed facsimile, (iii) on the
first business day following the date of deposit if delivered by guaranteed
overnight delivery service, or (iv) on the third business day following the date
delivered or mailed by United States registered or certified mail, return
receipt requested, postage prepaid, addressed as follows:


         If to the Executive:

                  Mark O. Johnson
                  c/o Express Scripts, Inc.
                  13900 Riverport Dr.
                  Maryland Heights, Missouri 63043
                  Attention:  President
                  Facsimile: (314) 702-7099

         If to the Company:

                  Express Scripts, Inc.
                  13900 Riverport Dr.
                  Maryland Heights, Missouri 63043
                  Attention:  President
                  Facsimile: (314) 770-1581

or to such other address as either party may have furnished to the other in
writing in accordance herewith, except that notices of change of address shall
be effective only upon receipt.

     8. Governing Law

     The validity, interpretation, construction and performance of this
Agreement shall be governed by the laws of the State of Missouri, without regard
to principles of conflicts of laws.

     9. Counterparts

     This Agreement may be executed in one or more counterparts, each of which
shall be deemed to be an original but all of which will constitute one and the
same instrument.

     10. Non-Assignability

     This Agreement is personal in nature and neither of the parties hereto
shall, without the consent of the other, assign, or transfer this Agreement or
any rights or obligations hereunder, except as provided in Section 6. Without
limiting the foregoing, the Executive's right to receive payments hereunder
shall not be assignable or transferable, whether by pledge, creation of a
security interest or otherwise, other than a transfer by his or her will or
trust or by the laws of descent or distribution, and in the event of any
attempted assignment or transfer contrary to this paragraph the Company shall
have no liability to pay any amount so attempted to be assigned or transferred.

     11. Term of Agreement

     This Agreement shall commence on the date hereof and shall continue in
effect through December 31, 1999; provided, however, that commencing on January
1 of 1999 and of each year thereafter, the term of this Agreement shall
automatically be extended for one additional year



unless, not later than September 30 of the preceding year, the Company or the
Executive shall have given notice to the other party that it does not wish to
extend this Agreement; provided further, if a Change in Control of the Company
shall have occurred during the original or any extended term of this Agreement,
this Agreement shall continue in effect for a period of twenty-four (24) months
beyond the month in which such Change in Control occurred; and, provided
further, that if the Company shall become obligated to make any payments or
provide any benefits pursuant to Section 2(c) or Section 2(d) hereof, this
Agreement shall continue in effect indefinitely.

     12. Arbitration

     (a) Scope; Initiation. Resolution of any and all disputes arising from or
in connection with this Agreement, whether based on contract, tort, statute or
otherwise, including disputes over arbitrability and disputes in connection with
claims by third persons ("Disputes") shall be exclusively governed by and
settled in accordance with the provisions of this Section 12; provided, that the
foregoing shall not preclude equitable or other judicial relief to enforce the
provisions hereof (including, without limitation, the provisions of the
Nondisclosure and Noncompetition Agreement and Section 2(g) hereof) or to
preserve the status quo pending resolutions of Disputes hereunder; and provided
further, that resolution of Disputes with respect to claims by third parties
shall be deferred until judicial proceedings with respect thereto are concluded.
Either party to this Agreement (each a "Party" and together the "Parties") may
commence proceedings hereunder by delivery of written notice providing a
reasonable description of the Dispute to the other, including a reference to
this Section (the "Dispute Notice").

     (b) Negotiations Between Parties. The Parties shall first attempt in good
faith to resolve promptly any Dispute by good faith negotiations. Not later than
three (3) business days after delivery of the Dispute Notice, the Company shall
appoint an officer to meet with the Executive or his or her representative at a
reasonably acceptable time and place, and thereafter as such representatives
deem reasonably necessary. The Parties shall exchange relevant non-privileged
information and endeavor to resolve the Dispute. Prior to any such meeting, each
Party or representative shall advise the other as to any other individuals who
will attend such meeting. All negotiations pursuant to this Section 12(b) shall
be confidential and shall be treated as compromise negotiations for purposes of
Rule 408 of the Federal Rules of Evidence and similarly under other federal and
state rules of evidence.

     (c) Binding Arbitration. The Parties hereby agree to submit all Disputes to
arbitration under the following provisions, which arbitration shall be final and
binding upon the Parties, their successors and assigns, and that the following
provisions constitute a binding arbitration clause under applicable law.

          (i) Either Party may initiate arbitration of a Dispute by delivery of
     a demand therefor (the "Arbitration Demand") to the other Party not sooner
     than five (5) business days after the date of delivery of the Dispute
     Notice but at any time thereafter.

          (ii) The arbitration shall be conducted in the County of St. Louis,
     Missouri, by three arbitrators (acting by majority vote, the "Panel")
     selected by agreement of the Parties not later than ten (10) days after
     delivery of the Arbitration Demand or, failing such agreement,



     appointed pursuant to the Commercial Arbitration Rules of the American
     Arbitration Association, as amended from time to time (the "AAA Rules"). If
     an arbitrator becomes unable to serve, his or her successor(s) shall be
     similarly selected or appointed.

          (iii) The arbitration shall be conducted pursuant to the Federal
     Arbitration Act and the Missouri Uniform Arbitration Act, such procedures
     as the Parties may agree or, in the absence of or failing such agreement,
     pursuant to the AAA Rules. Notwithstanding the foregoing: (w) each party
     shall be allowed to conduct discovery through written requests for
     information, document requests, requests for stipulations of fact, and
     depositions; (x) the nature and extent of such discovery shall be
     determined by the Panel, taking into account the needs of the Parties and
     the desirability of making discovery expeditious and cost-effective; (y)
     the Panel may issue orders to protect the confidentiality of information to
     be disclosed in discovery; and (z) the Panel's discovery rulings may be
     enforced in any court of competent jurisdiction.

          (iv) All hearings shall be conducted on an expedited schedule, and all
     proceedings shall be confidential. Either Party may at its expense make a
     stenographic record thereof.

          (v) The Panel shall complete all hearings not later than twenty (20)
     days after selection or appointment, and shall make a final award not later
     than ten (10) days thereafter. The award shall be in writing and shall
     specify the factual and legal bases of the award. The Panel may assess all
     or part of the costs and expenses of the arbitration, including the Panel's
     fees and expenses and fees and expenses of experts and legal counsel
     ("Arbitration Costs") as it deems fair and reasonable and, in circumstances
     where a Dispute has been asserted or defended against on grounds that the
     Panel deems manifestly unreasonable or the non-prevailing Party has
     rejected participation in procedures under Section 12(b), the Panel may
     assess all Arbitration Costs against the non-prevailing Party and may
     include in the award the Executive's and the Company's attorneys' fees and
     expenses in connection with any and all proceedings under this Section 12.
     Notwithstanding the foregoing, in no event may the Panel award multiple,
     punitive or exemplary damages to either Party.

     (d) Confidentiality - Notice. Each Party shall notify the other promptly,
and in any event prior to disclosure to any third person, if it receives any
request for access to confidential information or proceedings hereunder.

     13. No Setoff

     The Company shall have no right of setoff or counterclaim in respect of any
claim, debt or obligation against any payment provided for in this Agreement,
except to the extent provided in Section 4 hereof.

     14. Non-Exclusivity of Rights

     Nothing in this Agreement shall prevent or limit the Executive's continuing
or future participation in any benefit, bonus, incentive or other plan or
program provided by the Company or any of its subsidiaries or successors and for
which the Executive may qualify, nor shall anything



herein limit or reduce such rights as the Executive may have under any other
agreements with the Company or any of its subsidiaries or successors. Amounts
which are vested benefits or which the Executive is otherwise entitled to
receive under any plan or program of the Company or any of its subsidiaries
shall be payable in accordance with such plan or program, except as expressly
modified by this Agreement.

     15. No Guaranteed Employment

     The Executive and the Company acknowledge that this Agreement shall not
confer upon the Executive any right to continued employment and shall not
interfere with the right of the Company to terminate the employment of the
Executive at will, for any reason, and at any time, subject to the rights of the
Executive under any other agreement with the Company.

     16. No Trust Created

     Nothing contained in this Agreement and no action taken pursuant to the
provisions of this Agreement shall create or be construed to create a trust fund
of any kind. Any funds which may be set aside or provided for in this Agreement
shall continue for all purposes to be a part of the general funds of the Company
and no person other than the Company shall by virtue of the provisions of this
Agreement have any interest in such funds. To the extent that any person
acquires a right to receive payments from the Company under this Agreement, such
right shall be no greater than the right of any unsecured general creditor of
the Company.

     17. Invalidity of Provisions

     In the event that any provision of this Agreement is adjudicated to be
invalid or unenforceable under applicable law in any jurisdiction, the validity
or enforceability of the remaining provisions thereof shall be unaffected as to
such jurisdiction and such adjudication shall not affect the validity or
enforceability of such provision in any other jurisdiction. To the extent that
any provision of this Agreement is adjudicated to be invalid or unenforceable
because it is overbroad, that provision shall not be void but rather shall be
limited to the extent required by applicable law and enforced as so limited. The
parties expressly acknowledge and agree that this Section 17 is reasonable in
view of the Parties' respective interests.

     18. Non-Waiver of Rights

     The failure by the Company or the Executive to enforce at any time any of
the provisions of this Agreement or to require at any time performance by the
other party of any of the provisions hereof shall in no way be construed to be a
waiver of such provisions or to affect either the validity of this Agreement, or
any part hereof, or the right of the Company or the Executive thereafter to
enforce each and every provision in accordance with the terms of this Agreement.

     19. Miscellaneous

     No provisions of this Agreement may be amended, modified, waived or
discharged unless such amendment, waiver, modification or discharge is agreed to
in writing signed by the Executive



and the Company. No agreements or representations, oral or otherwise, express or
implied, with respect to the subject matter hereof have been made by either
party which are not set forth expressly in this Agreement. Section headings
contained herein are for convenience of reference only and shall not affect the
interpretation of this Agreement.


              [The remainder of this page intentionally left blank]







         IN WITNESS WHEREOF, the parties have caused this Severance Agreement to
be executed and delivered as of the day and year first above set forth.

PLEASE  NOTE:  BY SIGNING  THIS  SEVERANCE  AGREEMENT,  THE  EXECUTIVE IS HEREBY
CERTIFYING  THAT THE  EXECUTIVE  (A) HAS RECEIVED A COPY OF THIS  AGREEMENT  FOR
REVIEW AND STUDY  BEFORE  EXECUTING  IT, (B) HAS READ THIS  AGREEMENT  CAREFULLY
BEFORE  SIGNING  IT,  (C) HAS HAD  SUFFICIENT  OPPORTUNITY  BEFORE  SIGNING  THE
AGREEMENT TO ASK ANY  QUESTIONS  THE  EXECUTIVE  HAS ABOUT THE AGREEMENT AND HAS
RECEIVED  SATISFACTORY  ANSWERS  TO ALL  SUCH  QUESTIONS,  (D)  UNDERSTANDS  THE
EXECUTIVE'S  RIGHTS AND OBLIGATIONS  UNDER THE AGREEMENT,  (E) UNDERSTANDS THAT,
AMONG OTHER THINGS, THE NONDISCLOSURE AND  NONCOMPETITION  AGREEMENT EXTENDED BY
THIS AGREEMENT  PROHIBITS THE EXECUTIVE FROM DISCLOSING ANY COMPANY  PROPRIETARY
OR  CONFIDENTIAL  INFORMATION  AND PLACES  RESTRICTIONS ON HIS OR HER ABILITY TO
ENGAGE IN EMPLOYMENT AND ACTIVITIES  COMPETITIVE WITH THE COMPANY'S BUSINESS AND
(F) UNDERSTANDS THAT THIS AGREEMENT IN SECTION 12 INCLUDES A BINDING ARBITRATION
PROVISION.


THIS AGREEMENT IN SECTION 12 CONTAINS A BINDING ARBITRATION PROVISION WHICH MAY
BE ENFORCED BY THE PARTIES.

                                   EXPRESS SCRIPTS, INC.


                                   By:   /s/ Barrett A. Toan
                                     -----------------------------------------
                                         Barrett A. Toan
                                         President and Chief Executive Officer

                                   EXECUTIVE:

                                        /s/ Mark O. Johnson
                                   -------------------------------------------
                                   Mark O. Johnson

         The undersigned hereby acknowledges receiving a copy of this fully
executed Agreement for his or her records.


                                        /s/ Mark O. Johnson
                                   -------------------------------------------
                                   Mark O. Johnson






                                    EXHIBIT A


                       GENERAL RELEASE AND ACKNOWLEDGEMENT


     THIS GENERAL RELEASE AND  ACKNOWLEDGEMENT is made this ___ day of ________,
____, by ______________ (the "Executive") in favor of Express Scripts, Inc. (the
"Company")  pursuant  to Section  2(e) of the  Severance  Agreement  dated as of
_________, ____ (the "Agreement").  Unless otherwise defined herein, capitalized
terms appearing herein shall have the meanings given to them in the Agreement.

     1.  General  Release of  Claims.  The  Executive,  for and on behalf of the
Executive and the Executive's heirs, beneficiaries,  executors,  administrators,
successors,  assigns, and anyone claiming through or under any of the foregoing,
hereby agrees to, and does,  release and forever discharge the Company,  and its
agents, officers,  employees,  successors and assigns, from any and all matters,
claims, demands, damages, causes of action, debts,  liabilities,  controversies,
judgments and suits of every kind and nature whatsoever, foreseen or unforeseen,
known  or  unknown,  arising  out  of or  relating  to  any  matter  whatsoever,
including,  without limitation, the Executive's termination from employment with
the Company,  matters  arising from the offer and  acceptance of the  Agreement,
matters relating to employment  references or lack thereof from the Company, and
those claims described in paragraph 3 hereof.

     2.  Agreement  Not to File Suit.  The  Executive,  for and on behalf of the
Executive  and  the  Executive's   beneficiaries,   executors,   administrators,
successors,  assigns, and anyone claiming through or under any of the foregoing,
agrees  that he or she will not file or  otherwise  submit  any  charge,  claim,
complaint, or action to any agency, court, organization,  or judicial forum (nor
will the Executive permit any person,  group of persons, or organization to take
such action on the  Executive's  behalf)  against the Company arising out of any
actions or  non-actions  on the part of the  Company  prior to or as of the date
hereof  arising  out of or  relating  to any matter  whatsoever.  The  Executive
further  agrees that in the event that any person or entity  should bring such a
charge,  claim,  complaint,  or action on the Executive's  behalf, the Executive
hereby  waives  and  forfeits  any right to  recovery  under said claim and will
exercise  every good faith effort (but will not be obliged to incur any expense)
to have such claim dismissed.

     3. Claims  Covered.  The charges,  claims,  complaints,  matters,  demands,
damages,  and causes of action  referenced in paragraphs 1 and 2 above  include,
but are not  limited  to,  (i) any breach of an actual or  implied  contract  of
employment  between the  Executive  and the  Company,  (ii) any claim of unjust,
wrongful,  or  tortious  discharge  (including  any claim of fraud,  negligence,
retaliation  for   whistleblowing,   or  intentional   infliction  of  emotional
distress),  (iii) any claim of defamation or other common-law  action,  (iv) any
claims of violations arising under the Civil Rights Act of 1964, as amended,  42
U.S.C.ss.2000e  et seq., the Age  Discrimination  in Employment  Act,  ------ 29
U.S.C.ss.621  et  seq.,  the  Americans  with   Disabilities  Act  of  1990,  42
U.S.C.ss.12101 et seq., the Fair Labor ------ Standards Act of 1938, as amended,
29 U.S.C.ss.201 et seq., the Rehabilitation  Act of 1973, as amended,  29 U.S.C.
- ------ ss.701 et seq., or of the Illinois  Human Rights Act, 775 ILCS 5/1-101 et
seq., or any other relevant  federal,  state, or ------ ------ local statutes or
ordinances, (v) any claims for salary, bonus



pay or  severance  pay other  than  those  payments  and  benefits  specifically
provided in the Agreement, or (vi) any other matter whatsoever,  whether related
or unrelated to employment matters.

     4. Claims Excluded.  Notwithstanding  anything else herein to the contrary,
this General Release and Acknowledgment (the "General Release") shall not:

     (i) apply to the  obligations  of the Company  described in Sections  2(c),
     2(d), 6 and 12 of the Agreement; or

     (ii) affect,  alter or extinguish  any vested rights that the Executive may
     have with respect to any benefits,  rights or entitlements  under the terms
     of any employee  benefit  programs of the Company to which the Executive is
     or will be entitled by virtue of his or her employment  with the Company or
     any of its subsidiaries,  and nothing in this General Release will prohibit
     or be deemed to restrict the Executive  from enforcing his or her rights to
     any such benefits, rights or entitlements; or

     (iii) limit the Executive's right to indemnification to the extent provided
     in the Company's Certificate of Incorporation and/or bylaws.

     5.  Acknowledgments By signing this General Release and Acknowledgment (the
"General  Release"),  the Executive is hereby  certifying that the Executive (a)
has  received a copy of the  Agreement  and the  General  Release for review and
study before  executing it, (b) has read the  Agreement and the General  Release
carefully  before  signing  this  General   Release,   (c)  has  had  sufficient
opportunity  before  signing  this  General  Release  to ask any  questions  the
Executive  has about the  Agreement  or this  General  Release and has  received
satisfactory  answers to all such  questions,  (d)  understands  the Executive's
rights  and  obligations  under the  Agreement  and this  General  Release,  (e)
acknowledges and reaffirms the provisions of Section 2(f) of the Agreement,  (f)
understands that the Agreement includes a binding arbitration provision, and (g)
understands that the Agreement and the General Release are legal documents,  and
that by signing the Agreement and the General Release the Executive is giving up
certain  legal  rights  including  but  not  limited  to  rights  under  the Age
Discrimination  in  Employment  Act,  29 U.S.C.  ss.  621 et seq.  and the other
matters covered in Section 3 hereof.  The Executive also acknowledges that he or
she has been  given at least  twenty-one  (21)  days to  consider  this  General
Release and that he or she has been  advised to consult  with an attorney  about
its terms.  If the  Executive  has executed  this General  Release  prior to the
expiration of the  twenty-one  (21) day period  specified  above,  the Executive
acknowledges  and agrees that he or she was afforded the opportunity to consider
the  Agreement  for  twenty-one  (21)  days  before  executing  it and  that the
Executive's  execution  of  this  Agreement  prior  to the  expiration  of  such
twenty-one  (21) day period was his or her free and voluntary act. The Executive
further  understands that he or she may revoke this General Release within seven
(7) days after he or she signs it and that if the Executive does not revoke this
General Release within that time,  this General  Release  becomes  effective and
enforceable by both parties  immediately  after the expiration of such seven-day
period.  The Executive also  understands  that any revocation must be in writing
and must be  received  by the Company no later than the close of business on the
seventh day after his or her execution of this General Release.  The Company has
given the Executive enough time to consult



with his or her  family and other  advisers  and to  consider  whether he or she
should agree to the terms of this General Release.

     6.  Governing   Law.  The  validity,   interpretation,   construction   and
performance  of this General  Release shall be governed by the laws of the State
of Missouri, without regard to principles of conflicts of laws.

         IN WITNESS WHEREOF, the undersigned has caused this General Release to
be executed and delivered as of the day and year first above set forth.


         THE AGREEMENT IN SECTION 12 CONTAINS A BINDING ARBITRATION PROVISION
WHICH MAY BE ENFORCED BY THE PARTIES.



                                 EXECUTIVE:


                                 ------------------------------------------
                                 Mark O. Johnson