1998 IMS HEALTH INCORPORATED REPLACEMENT PLAN
        FOR CERTAIN NON-EMPLOYEE DIRECTORS HOLDING COGNIZANT CORPORATION
                              EQUITY-BASED AWARDS


1.   Purpose of the Plan

     The  purpose  of the  1998 IMS  Health  Incorporated  Replacement  Plan for
Certain Non-employee Directors Holding Cognizant Corporation Equity-Based Awards
is to provide for the award of substantially identical replacement stock options
to  certain  non-employee  directors  of IMS  Health  Incorporated,  a  Delaware
corporation  whose  awards  under the 1996  Cognizant  Corporation  Non-Employee
Directors'  Stock  Incentive Plan were cancelled  pursuant to the spinoff of the
Company  from  Cognizant  Corporation,  a  Delaware  corporation  and to certain
retired non-employee  directors who elect,  pursuant to the Spinoff, to have the
awards granted under the Cognizant Plan cancelled (the "Eligible Holders").  The
Company expects that the Plan will aid the Company in attracting,  retaining and
compensating  non-employee  directors  and to  enable  them  to  increase  their
ownership  of  Shares.  The  Plan  will be  beneficial  to the  Company  and its
shareholders  since  it will  allow  non-employee  directors  to have a  greater
personal  financial  stake in the Company  through the  ownership of Shares,  in
addition to underscoring  their common interest with  shareholders in increasing
the value of the Shares on a long-term basis. It is the intention of the Company
that the terms of the  replacement  awards will (i)  substantially  preserve the
economic value of the cancelled  Cognizant  awards and (ii) except for the terms
described in Sections 7, 8 and 9 of this Plan, remain substantially identical to
the terms of the cancelled Cognizant awards.

2.   Definitions

     The  following  capitalized  terms  used in the Plan  have  the  respective
meanings set forth in this Section:

     (a)  Act: The Securities Exchange Act of 1934, as amended, or any successor
          thereto.

     (b)  Awards:  Replacement Options and Replacement  Restricted Stock granted
          pursuant to the Plan.

     (c)  Beneficial  Owner:  As  defined  in rule  13d-3  under the Act (or any
          successor rule thereto).

     (d)  Board: The Board of Directors of the Company.




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     (e)  Change in Control: The occurrence of any of the following events:

          (i) any Person (other than the Company, any trustee or other fiduciary
          holding  securities under an employee benefit plan of the Company,  or
          any company owned, directly or indirectly,  by the stockholders of the
          Company in  substantially  the same  proportions as their ownership of
          stock of the  Company),  becomes  the  Beneficial  Owner,  directly or
          indirectly,  of securities of the Company  representing 20% or more of
          the   combined   voting  power  of  the   Company's   then-outstanding
          securities;

          (ii) during any period of twenty-four months (not including any period
          prior to the Effective Date), individuals who at the beginning of such
          period  constitute the Board,  and any new director  (other than (A) a
          director  nominated by a Person who has entered into an agreement with
          the Company to effect a  transaction  described  in Sections  2(e)(i),
          (iii) or (iv) of the Plan,  (B) a  director  nominated  by any  Person
          (including the Company) who publicly announces an intention to take or
          to consider taking actions  (including,  but not limited to, an actual
          or threatened  proxy contest) which if consummated  would constitute a
          Change in Control or (C) a director nominated by any Person who is the
          Beneficial Owner, directly or indirectly, of securities of the Company
          representing 10% or more of the combined voting power of the Company's
          securities)  whose election by the Board or nomination for election by
          the  Company's  stockholders  was  approved in advance by a vote of at
          least  two-thirds  (2/3) of the  directors  then  still in office  who
          either were directors at the beginning of the period or whose election
          or nomination for election was  previously so approved,  cease for any
          reason to constitute at least a majority thereof;

          (iii) the  stockholders  of the  Company  approve any  transaction  or
          series  of   transactions   under  which  the  Company  is  merged  or
          consolidated   with  any  other  company,   other  than  a  merger  or
          consolidation  (A) which would result in the voting  securities of the
          Company outstanding  immediately prior thereto continuing to represent
          (either by remaining outstanding or by being converted into





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          voting  securities of the  surviving  entity) more than 66 2/3% of the
          combined voting power of the voting  securities of the Company or such
          surviving  entity   outstanding   immediately  after  such  merger  or
          consolidation  and (B) after which no Person  holds 20% or more of the
          combined  voting  power  of  the  then-outstanding  securities  of the
          Company or such surviving entity; or

          (iv)  the  stockholders  of the  Company  approve  a plan of  complete
          liquidation of the Company or an agreement for the sale or disposition
          by the Company of all or substantially all of the Company's assets.

     (f)  Code: The Internal Revenue Code of 1986, as amended,  or any successor
          thereto.

     (g)  Cognizant: Cognizant Corporation, a Delaware corporation.

     (h)  Cognizant Plan: The 1996 Cognizant Corporation Non-Employee Directors'
          Stock Incentive Plan.

     (i)  Committee: The Compensation and Benefits Committee of the Board.

     (j)  Company: IMS Health Incorporated, a Delaware corporation.

     (k)  Daily Average Trading Prices:  The average of the high and low trading
          prices for stock on a given day.

     (l)  Disability:  Inability to continue to serve as a non-employee director
          of the  Board  due to a  medically  determinable  physical  or  mental
          impairment  which  constitutes  a permanent and total  disability,  as
          determined by the Committee  (excluding  any member  thereof whose own
          Disability is at issue in a given case) based upon such evidence as it
          deems  necessary  and  appropriate.  An Eligible  Holder  shall not be
          considered  disabled  unless he or she furnished such medical or other
          evidence of the existence of the Disability as the  Committee,  in its
          sole discretion, may require.




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     (m)  Effective  Date:  The date on which the Plan takes effect,  as defined
          pursuant to Section 14 of the Plan.

     (n)  Eligible Holder: As such term is defined in Section 1 of the Plan.

     (o)  Fair Market Value:  On a given date, the  arithmetic  mean of the high
          and low prices of the Shares as reported on such date on the Composite
          Tape of the  principal  national  securities  exchange  on which  such
          Shares are listed or  admitted to trading,  or, if no  Composite  Tape
          exists for such national securities exchange on such date, then on the
          principal national securities exchange on which such Shares are listed
          or admitted  to trading,  or, if the Shares are not listed or admitted
          on a national  securities  exchange,  the  arithmetic  mean of the per
          Share closing bid price and per Share closing asked price on such date
          as quoted on the National  Association of Securities Dealers Automated
          Quotation  System (or such market in which such  prices are  regularly
          quoted),  or, if there is no market on which the Shares are  regularly
          quoted,  the Fair Market Value shall be the value  established  by the
          Committee in good faith. If no sale of Shares shall have been reported
          on such  Composite Tape or such national  securities  exchange on such
          date or quoted  on the  National  Association  of  Securities  Dealers
          Automated   Quotation  System  on  such  date,  then  the  immediately
          preceding  date on which  sales of the Shares have been so reported or
          quoted shall be used.

     (p)  Person:  As such term is used in Section 13(d) or 14(d) of the Act (or
          any successor section thereto).

     (q)  Plan: The 1998 IMS Health  Incorporated  Replacement  Plan for Certain
          Non-Employees  Directors  Holding Cognizant  Corporation  Equity-Based
          Awards.

     (r)  Replacement  Option:  A stock option granted  pursuant to Section 7 of
          the Plan.

     (s)  Replacement  Restricted  Stock:  Restricted  stock granted pursuant to
          Section 8 of the Plan.





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     (t)  Retirement:  Termination  of  service  with  the  Company  after  such
          Eligible Holder has attained age 70,  regardless of the length of such
          Eligible  Holder's  service;  or with the prior written consent of the
          Committee  (excluding  any member  thereof whose own  Retirement is at
          issue in a given case), termination of service at an earlier age after
          the Eligible  Holder has  completed  six or more years of service with
          the Company.

     (u)  Shares:  Shares of common  stock,  par value  $.01 per  share,  of the
          Company.

     (v)  Spinoff  Date:  The date on which the  Shares are  distributed  to the
          shareholders.

     (w)  Subsidiary: A subsidiary corporation,  as defined in Section 424(f) of
          the Code (or any successor section thereto).




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3.   Shares Subject to the Plan

     The total  number of Shares  which may be issued under the Plan is equal to
the aggregate number of Shares to be issued as replacement awards, as calculated
pursuant to Sections 7 and 8 of this Plan.  The Shares may consist,  in whole or
in part,  of unissued  Shares or  treasury  shares.  After the initial  grant of
awards, no further awards shall be granted under the Plan.

4.   Administration

     The Plan shall be  administered  by the  Committee,  which may delegate its
duties and  powers in whole or in part to any  subcommittee  thereof  consisting
solely of at least two "non-employee directors" within the meaning of Rule 16b-3
under the Act (or any successor  rule  thereto).  The Committee is authorized to
interpret the Plan, to  establish,  amend and rescind any rules and  regulations
relating  to the  Plan,  and to make  any  other  determinations  that it  deems
necessary or desirable  for the  administration  of the Plan.  The Committee may
correct any defect or supply any omission or reconcile any  inconsistency in the
Plan in the manner and to the extent the Committee deems necessary or desirable.
Any decision of the Committee in the  interpretation  and  administration of the
plan, as described herein, shall lie within its sole and absolute discretion and
shall be final, conclusive and binding on all parties concerned (including,  but
not limited to, Eligible Holders and their beneficiaries or successors).

5.   Eligibility

     Only Eligible  Holders shall receive  grants of  replacement  stock options
under the Plan.

6.   Limitations

     Options  hereunder  shall only be granted in replacement of Cognizant Stock
Options  (as  defined in  Section  7(a) of the Plan)  held by  Eligible  Holders
immediately prior to the Spinoff Date.


7.   Terms and Conditions of Options

     Options  granted  under the Plan shall be  non-qualified  stock options for
federal income tax purposes, as evidenced by the related Option agreements,  and
shall be subject to the foregoing and the following  terms and conditions and to
such other terms and conditions,  not inconsistent  therewith,  as the Committee
shall determine:




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     (a) Generally.  As of the Spinoff, each unexercised stock option held by an
Eligible  Holder that was granted under the Cognizant  Plan (a "Cognizant  Stock
Option")  shall  be  cancelled,   and  such  Eligible  Holder  shall  receive  a
replacement  stock option pursuant to this Plan. The number of Shares covered by
each replacement  stock option shall be determined by (i) multiplying the number
of shares of Cognizant  common stock  covered by the cancelled  Cognizant  Stock
Option by a fraction, the numerator of which is the average of the Daily Average
Trading Prices of Cognizant common stock for the five  consecutive  trading days
immediately  preceding the first date on which Cognizant  common stock is traded
ex-dividend,  and the  denominator  of which is the average of the Daily Average
Trading Prices of the Shares for the five  consecutive  trading days starting on
the first  date on which the  Shares  are  traded  regular  way (the  "Cognizant
Ratio")  and (ii)  rounding  down the result to a whole  number of  shares.  The
option price of each  replacement  stock option shall be  determined by dividing
the option price of the cancelled Cognizant Stock Option by the Cognizant Ratio.
Unless  otherwise  specified  in this Plan,  all other terms of the  replacement
stock  options  shall remain  substantially  identical to those of the cancelled
Cognizant  Stock Options as set forth in the Cognizant  Plan and related  option
agreement(s).

     (b) Exercisability.  Except as set forth in the Plan, stock options granted
under the Plan shall have  substantially  identical  terms as those of the stock
options originally granted under the Cognizant Plan; provided,  however, that in
no event shall a  replacement  stock option be  exercisable  more than ten years
after the date the original option was granted under the Cognizant Plan.

     (c) Exercise of Options.  Except as otherwise  provided in the Plan or in a
related  Option  agreement,  an Option may be exercised for all, or from time to
time any part, of the Shares for which it is then  exercisable.  For purposes of
Section 7 of the Plan,  the exercise date of an Option shall be the later of the
date a notice of exercise is received by the Company and, if applicable, (A) the
date payment is received by the Company  pursuant to clauses (i),  (ii) or (iii)
in the  following  sentence  or (B) the  date of  sale by a  broker  of all or a
portion of the Shares being  purchased  pursuant to clause (iv) in the following
sentence.  The purchase  price for the Shares as to which an Option is exercised
shall be paid to the Company in full at the time of exercise at the  election of
the Eligible Holder (i) in cash, (ii) in Shares having a Fair Market Value equal
to the aggregate Option Price for the Shares being purchased and satisfying such
other requirements as may be imposed by the Committee,  (iii) partly in cash and
partly in such Shares or (iv) through the delivery of  irrevocable  instructions
to a broker to




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deliver  promptly to the Company an amount equal to the  aggregate  Option Price
for the Shares  being  purchased.  No Eligible  Holder  shall have any rights to
dividends or other rights of a stockholder  with respect to Shares subject to an
Option until the  Eligible  Holder has given  written  notice of exercise of the
Option, paid in full for such Shares and, if applicable, has satisfied any other
conditions imposed by the Committee pursuant to the Plan.

     (d)  Exercisability  Upon  Termination of Service by Death.  If an Eligible
Holder's service with the Company and its  Subsidiaries  terminates by reason of
death after the date of grant of an Option, (i) the unexercised  portion of such
Option shall  immediately  vest in full and (ii) such portion may  thereafter be
exercised  during the shorter of (A) the remaining  stated term of the Option or
(B) five years after the date of death.

     (e) Exercisability Upon Termination of Service by Disability or Retirement.
If an Eligible Holder's service with the Company and its Subsidiaries terminates
by reason of Disability or Retirement after the date of grant of an Option,  (i)
the unexercised  portion of such Option shall  immediately vest in full and (ii)
such portion may thereafter be exercised during the shorter of (A) the remaining
stated term of the Option or (B) five years  after the date of such  termination
of service;  provided,  however, that if an Eligible Holder dies within a period
of five years after such termination of service,  the unexercised portion of the
Option may  thereafter  be  exercised,  during the shorter of (i) the  remaining
stated  term of the  Option or (ii) the  period  that is the  longer of (A) five
years  after the date of such  termination  of service or (B) one year after the
date of death.

     (f) Effect of Other Termination of Service. If an Eligible Holder's service
with the  Company  and its  Subsidiaries  terminates  for any reason  other than
death,  Disability  or  Retirement  after  the  date of grant  of an  Option  as
described  above,  the  unexercised  portion  of an  Option  may  thereafter  be
exercised  during  the  period  ending  ninety  days  after  the  date  of  such
termination  of  service,  but only to the  extent  to  which  such  Option  was
exercisable at the time of such termination of service.

8.   Terms and Conditions of Restricted Stock

     As  of  the  Spinoff  Date,  Cognizant  Restricted  Stock  and  IMS  Health
Restricted  Stock  held by an  Eligible  Holder  shall  be  forfeited,  and such
Eligible  Holder shall receive  replacement  restricted  stock  pursuant to this
Plan.  The number of shares of  





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restricted  stock shall equal (i) the number of shares of  forfeited  IMS Health
Restricted  Stock  plus  (ii)  the  number  of  shares  of  forfeited  Cognizant
Restricted Stock multiplied by a fraction, the numerator of which is the average
of the Daily  Average  Trading  Prices of  Cognizant  common  stock for the five
consecutive  trading days  starting on the  ex-dividend  trading  date,  and the
denominator  of which is the average of the Daily Average  Trading Prices of the
Shares for the five consecutive trading days starting on the first date on which
the Shares are traded regular way. Unless otherwise  specified in this Plan, all
other  terms of the  replacement  restricted  stock shall  remain  substantially
identical to those of the forfeited  Cognizant  Restricted Stock as set forth in
the  applicable   Cognizant  Plans  and  related   Cognizant   Restricted  Stock
agreement(s).

9.   Adjustments Upon Certain Events

     Notwithstanding  any  other  provisions  in the Plan to the  contrary,  the
following provisions shall apply to all Awards granted under the Plan:

     (a) Generally.  In the event of any change in the outstanding  Shares after
the  Effective  Date by reason of any Share  dividend or split,  reorganization,
recapitalization,  merger, consolidation,  spin-off,  combination or exchange of
Shares or other  corporate  exchange,  or any  distribution  to  shareholders of
Shares other than regular cash dividends,  the Committee, in its sole discretion
and without  liability to any person,  may make such substitution or adjustment,
if any, as it deems to be  equitable,  as to (i) the number or kind of shares or
other  securities  issued  or  reserved  for  issuance  pursuant  to the Plan or
pursuant to  outstanding  Awards,  (ii) the Option  Price and/or (iii) any other
affected terms of such Awards.

     (b) Change in Control.  In the event of a Change in Control,  the Committee
in its sole  discretion  and  without  liability  to any  person  may take  such
actions,  if any, as it deems  necessary or desirable  with respect to any Award
(including,  without  limitation,  (i) the  acceleration  of an Award,  (ii) the
payment of a cash amount in exchange  for the  cancellation  of an Award  and/or
(iii) the requiring of the issuance of substitute Awards that will substantially
preserve  the value,  rights and  benefits  of any  affected  Awards  previously
granted hereunder) as of the date of the consummation of the Change in Control.

10.  Successors and Assigns

     The Plan shall be binding on all  successors and assigns of the Company and
an Eligible Holder,  including without  limitation,  





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the estate of such Eligible Holder and the executor, administrator or trustee of
such estate,  or any receiver or trustee in bankruptcy or  representative of the
Eligible Holder's creditors.

11.  Amendments or Termination

     The Board may  amend,  alter or  discontinue  the Plan,  but no  amendment,
alteration or discontinuation shall be made which would impair the rights of any
Eligible  Holder  under any Award  theretofore  granted  without  such  Eligible
Holder's consent.

12.  Nontransferability of Awards

     An Award shall not be  transferable  or assignable  by the Eligible  Holder
otherwise  than by will or by the laws of descent and  distribution.  During the
lifetime  of an Eligible  Holder,  an Award  shall be  exercisable  only by such
Eligible Holder.  An Award exercisable after the death of an Eligible Holder may
be exercised by the legatees,  personal  representatives  or distributees of the
Eligible Holder. Notwithstanding anything to the contrary herein, the Committee,
in its sole  discretion,  shall have the  authority to waive this Section 12 (or
any part  thereof) to the extent that this  Section 12 (or any part  thereof) is
not  required  under the rules  promulgated  under any law,  rule or  regulation
applicable to the Company.

13.  Choice of Law

     The Plan shall be governed by and construed in accordance  with the laws of
the State of New York  applicable  to contracts  made and to be performed in the
State of New York.

14.  Effectiveness of the Plan

     The Plan shall be effective as of the Spinoff Date.