Exhibit 10.38
                                    AGREEMENT

         This Agreement made effective February 27, 1997 between DIANON SYSTEMS,
INC., a Connecticut corporation; and any successor thereto, hereinafter referred
to as the "Company," and RICHARD A. SANDBERG,  residing at 233 Brushy Ridge, New
Canaan, Connecticut 06840.

                                   WITNESSETH

         WHEREAS,  Richard A. Sandberg wishes to resign his position as Chairman
of the Board of Directors of the Company; and

         WHEREAS,  the Company  wishes to continue to employ Richard A. Sandberg
and Richard A. Sandberg wishes to accept such continued employment, in each case
for the purposes, on the terms, for the period and subject to the conditions set
forth below; and

         WHEREAS, the services that Richard A. Sandberg should render under this
Agreement to the Company are unique and valuable; and

         WHEREAS,  the  parties  desire to reduce  the terms and  conditions  of
Richard A. Sandberg's employment to writing; and

         WHEREAS,  the Compensation  Committee has approved and recommended that
the Company enter into this Agreement; and

         WHEREAS, based on the recommendation of the Compensation Committee, the
Board of Directors has ratified and approved this  Agreement and, in particular,
(i) has  ratified,  approved  and  confirmed  the  original  grant to Richard A.
Sandberg  of all options to  purchase  Company  stock held by him as of the date
hereof,  (ii) has approved the vesting in full of all options held by Richard A.
Sandberg as of the date hereof to the extent not previously  vested as set forth
in Section 2 hereof,  and (iii) has approved the purchase of all options held by
Richard A. Sandberg on terms set forth in Section 2 hereof.

         NOW,  THEREFORE,  in  consideration of the terms and conditions and the
mutual  covenants  contained  in this  Agreement,  the  Company  and  Richard A.
Sandberg hereby agree as follows:

         1. Resignation As Chairman

         Richard A. Sandberg  resigns as Chairman of the Board and as an officer
of the Company effective as of February 27, 1997.

         2. Stock Options

         All  options to buy  Company  stock held by Richard A.  Sandberg  as of
February 27, 1997,  (Options") to the extent not previously  vested will vest in
full  effective  February 27, 1997,  provided  that Richard A. Sandberg does not
revoke this Agreement pursuant to Section 24 of this Agreement.  A revocation by
Mr.  Sandberg of this Agreement  pursuant to Section 24 of This Agreement  shall
not affect (i) any Option (or portion  thereof) that was not vested  pursuant to
this  Section 2 and (ii) any  Option  that was  exercised  or sold by Richard A.
Sandberg prior to the date of such revocation.  Richard A. Sandberg may sell any
or all of the  options to the  Company  on or before May 28,  1997 for cash at a
price equal to (i) the number of shares of Company  stock covered by such Option
times (ii) the amount by which 10 7/8 exceeds the exercise price of such Option.
The  options  will  otherwise  be  exercisable  according  to the terms of their
initial grant(s).

         3. Employment As Consultant To The President

         The Company  hereby  employs  Richard A.  Sandberg as Consultant to the
President as of February 28, 1997 and Richard A.  Sandberg  hereby  accepts such
employment  upon the  terms and  conditions  set  forth in this  Agreement.  The
position  of  Consultant  to the  President  is not an officer  position  in the
Company.




         4. Duties and Responsibilities

         Richard A.  Sandberg  will  perform  with  continuous  diligence  those
activities  assigned  to Richard  A.  Sandberg  by the  Company's  President  in
connection  with  special  projects  as the  President  may  from  time  to time
identify.  The parties  acknowledge  that the President  has full  discretion to
determine  the nature of all such  projects  and  location or locations at which
Richard A. Sandberg  shall perform  assigned  activities  under this  Agreement,
provided  that Richard A.  Sandberg  shall not be required to relocate  from his
residence in New Canaan, Connecticut.

         5. Term

         Richard A. Sandberg's  employment as Consultant to the President of the
Company will commence on February 28, 1997 and terminate  according to the terms
of Section 8 of this Agreement.

         6. Compensation

         The Company will compensate Richard A. Sandberg for his services during
the term of his  employment as Consultant to the President  under this Agreement
on a salaried  basis paid in  installments  at an  annualized  rate of $232,000.
Richard  A.  Sandberg  will  not   participate  in  any   management   incentive
compensation program maintained by the Company during the term of his employment
as Consultant to the President under this Agreement.

         7. Fringe Benefits

         During the term of his employment as Consultant to the President  under
this  Agreement,  the Company  will  provide  Richard A.  Sandberg  benefits and
emoluments as authorized for all other salaried Grade 19 management employees of
the Company as they may be modified from time to time by the Company,  including
at the time of the execution of this  Agreement,  health and medical  insurance,
life insurance, sick leave, vacation,  holidays, car allowance,  retirement plan
participation and stock purchase plan participation.

         8. Termination

         Richard A. Sandberg's employment as Special Consultant to the President
under  this  Agreement  will  terminate  on the  first  of any of the  following
occurrences:

         (a)      Richard A. Sandberg's death;

         (b)      Richard A,  Sandberg's  disability  for a period of 90 days or
                  more unless waived by the Board of Directors;

         (c)      mutual  agreement of the parties  reduced to writing signed by
                  both parties;

         (d)      voluntary resignation by Richard A. Sandberg;

         (e)      February 27, 1998,  absent renewal of this Agreement by mutual
                  agree-ment of the parties  memorialized in a writing signed by
                  both parties;

         (f)      termination by the Company for Cause,  i.e., gross negligence,
                  insub-ordination, or willful misconduct.

         9. Compensation After Termination

         (a) Richard A. Sandberg will not receive  compensation from the Company
after the  termination  of his  employment as Consultant to the President  under
this Agree-ment, other than unused vacation, except as described under paragraph
(b) of this Section of this Agreement, if applicable. Nothing in this Agreement,
however,  is intended to impair any rights  vested  under the law in any benefit
plan of the Company.

         (b) If Richard A. Sandberg's  employment as Consultant to the President
of the Company  terminates  because of the occurrence of the event  described in
paragraph (e) of Section 8 of this Agreement:


         (i)      For a period of six months  beginning  with February 28, 1998,
                  the Company will pay Richard A. Sandberg  severance pay at his
                  rate of base pay on that date;

         (ii)     During said six month  period,  the Company  will pay the full
                  premium cost of medical  continuation  coverage for Richard A.
                  Sandberg  and/or his  dependents for any months in said period
                  during which Richard A.  Sandberg  and/or his  dependents  are
                  eligible and elect to continue such coverage;

         (iii)    During said six month period, the Company will provide Richard
                  A. Sandberg any Company car allowance  Richard A. Sandberg was
                  receiving on February 28, 1998; and

         (iv)     For  purposes  of stock  option  exercise,  a  termination  of
                  Richard A. Sandberg's  employment pursuant to paragraph (e) of
                  Section  8 of this  Agreement  shall be a  termination  by the
                  Company.

         10. Return of Property

         On the date  Richard A.  Sandberg's  employment  as  Consultant  to the
President terminates pursuant to Section 8 of this Agreement,  or at any earlier
point in time  when a  request  is made by the  Company  for  same,  Richard  A.
Sandberg  will turn over to the Company all notes,  reports,  memoranda,  books,
records,  chemicals,  devices and  documents,  whether in written,  typewritten,
computerized or any other form, which are in Richard A. Sandberg's possession or
under his control,  whether  prepared by him or others related to the Company or
relating to the business of the Company. Richard A. Sandberg will also return to
the  Company at the time his  employment  terminates,  or on an earlier  Company
request,  any Company keys,  parking card, credit card,  business cards or other
materials  related to this  employment  with the Company or the operation of the
Company.  Richard A. Sandberg will return to the Company any car this  Agreement
permits him to use for six months after the  termination of his employment  with
the Company at the conclusion of said six month period.

         11. Confidential Information

         Richard  A.  Sandberg  acknowledges  his  pre-existing  and  continuing
obligation not to use or disclose,  other than as authorized by the Company, any
trade  secrets or other  confidential  information  he has acquired  through his
association with the Company.

         12. Activity Against Company's Interest

         For the period of the  employment  of Richard A. Sandberg as Consultant
to the  President  of the  Company  and for a  period  of two  years  after  the
termination of that employment, Richard A. Sandberg will not engage or otherwise
be involved,  either directly or indirectly, in the recruitment of the Company's
employees or take any other action  ad-verse to the  management  of the Company.
Notwithstanding  the foregoing,  the parties agree that Richard A. Sandberg will
not violate his  obligations  under this  paragraph  by voting his shares in the
Company,  by voting on matters  before the Board of  Directors of the Company so
long as he  continues  to be a Director  of the  Company;  or by engaging in any
non-Company  business  activity  other  than  those he  commits to avoid in this
Agreement.

         13. Non Competition

         Richard A. Sandberg will not compete with any business  activity of the
Company  during his  employment  with the  Company and for a period of two years
after  the  termination  of that  employment.  Competition  includes  ownership,
management  (including serving as an officer or director),  operation,  control,
employment  or  consultation  of, by or to any business  organization  or entity
which  directly  or  indirectly  offers  the same or similar  services  as those
offered or  actively  being  developed  by the  Company  on the date  Richard A.
Sandberg's  employment  with the  Company  terminates.  The  obligation  in this
paragraph shall not be violated by Richard A. Sandberg's  ownership of shares of
stock in a  corporation  involved in such  activities  provided  such shares are
publicly  traded,  Richard A.  Sandberg  owns less than two percent of the total
number of issued and outstanding shares and Richard A. Sandberg is not otherwise
connected  with or active in, the  business  of such  corporation.  The  parties
recognize  that the Company's  business is carried on by telephone and from time
to time in person in each of the 50 States of the United  States of America  and
therefore that Richard A. Sandberg's  Agreement not to compete must apply in all
such 50 States.




         14. Remedies For Breach Of Certain Covenants

         The parties  acknowledge  that because  Richard A. Sandberg has been an
officer and director of the Company and as such was and remains  conversant with
and had access to, the business,  affairs, records, trade secrets, customers and
customer  lists,  suppliers,   supplier  lists,  patents,   technical  know-how,
chemicals,  devices, sales or distribution agents and representatives,  sales or
distribution  agents and  representatives  lists,  and other  con-fidential  and
proprietary  information of the Company, his compliance with Sections 10, 11, 12
and 13 of this  Agreement  is  necessary  to  protect  the  goodwill  and  other
proprietary  interests  of the  Company  and a  breach  of  said  covenants  and
agreements in this Agreement will result in continuing and irreparable damage to
the Company for which there will be no adequate  remedy at law.  Therefore,  the
parties  acknowledge  that in the event of a breach  of  Richard  A.  Sandberg's
commitments in Sections 10, 11, 12 or 13 of this Agreement, the Company shall be
entitled,  if it so elects, to institute and prosecute  proceedings in any court
of competent  jurisdiction  either in law or in equity to obtain damages for any
breach of this Agreement and/or to enforce the specific  performance  thereof by
Richard A. Sandberg and/or to enjoin Richard A. Sandberg from retaining  Company
property, using confidential Company information,  competing with the Company or
soliciting or recruiting its employees or otherwise acting against the Company's
interests.

         15. Release And Waiver

         Richard   A.   Sandberg,   on  behalf  of   himself,   his   executors,
administrators  and assigns,  hereby releases the Company,  its affiliates,  and
their  respective  directors,   officers,  agents,  employees,   benefit  plans,
fiduciaries and  administrators  of such benefit plans and their  successors and
assigns  (hereinafter  "Released  Parties") from any and all claims or causes of
action of any kind,  other than vested  rights under  benefit plans or claims to
enforce  this  Agreement,  arising  on or  before  the  effective  date  of this
Agreement,  which  Richard A. Sandberg has, had or may have against any of them,
whether or not now known,  including but not limited to, any claims arising from
Richard  A.  Sandberg's  employment  or  officership  with the  Company,  or the
termination  thereof,  including  without  limitation  any claims  under the Age
Discrimination In Employment Act.

         16. Covenant Not To Sue

         Richard  A.  Sandberg  on  behalf of  himself,  his  heirs,  executors,
administrators  and assigns,  further  agrees never  directly or  indirectly  to
commence or prosecute, or to permit or advise to be commenced or prosecuted, any
action,  proceeding,  or charge  against  any  Released  Party,  in any state or
federal  court,  administrative  agency or  arbitral  forum with  respect to any
matter other than to enforce this Agreement,  whether or not now known,  for any
claim  whatsoever  (including but not limited to, any claim arising from Richard
A.  Sandberg's  employment or officership  with the Company,  or the termination
thereof) based upon any act,  transaction,  practice,  conduct, or omission that
occurred  prior to the effective  date of this  Agreement,  which he now has, or
claims  to  have,  or which at any  time  heretofore  had,  or which at any time
hereafter may have.  This covenant  includes but is not limited to, rights under
the Age  Discrimination in Employment Act or any other federal,  state, or local
laws prohibiting age, race, sex,  national origin,  religion,  or other forms of
discrimination,  claims for breach of contract or  promissory  estoppel or tort,
and claims  growing  out of any legal  restrictions  on the  Company's  right to
terminate its employees or officers.

         17. Non Admission

         The parties  recognize and agree that this Agreement does not and shall
not constitute an admission of liability or wrongdoing by Richard A. Sandberg or
the Company or its present or former affiliates,  directors,  officers,  agents,
employees.


         18. No Abridgment of Indemnification

         Nothing  in  this  Agreement  is  intended  to  limit  or  abridge  any
indemnification  the Company would otherwise  provide Richard A. Sandberg of and
from any claims based on his actions as an officer or director of the Company.





         19. Intent To Be Enforced As Fully As Possible

         In the event  that any of the  terms or  provisions  of this  Agreement
shall  violate  any  statutory   provision  or  may  be  otherwise  unlawful  or
inoperative,  it is the intent of the parties that this Agreement operate and be
of  full  force  and  effect  insofar  as it does  not  violate  said  statutory
provisions or is otherwise  lawful and that this Agreement be carried out as far
as possible in a manner consistent with its intent.

         20. Litigation Costs

         In the event Richard A. Sandberg does not exercise his rights to revoke
this  Agreement  in  accordance  with  Section 24 and files a claim,  lawsuit or
complaint  against the Company in any court or governmental  agency with respect
to the claims released under this Agreement, Richard A. Sandberg shall be liable
for all costs and expenses including legal fees,  incurred by any Released Party
in defense of that action.

         21. Voluntariness

         Richard  A.  Sandberg   represents  that  he  has  carefully  read  and
completely  understands  this  Agreement  and  that  he has  entered  into  this
Agreement  voluntarily after having had an opportunity to consult with his legal
advisors,  which  he has  been  encouraged  to do in  writing  by  the  Company.
(Attachment A)

         22. Time To Review

         Richard A.  Sandberg  acknowledges  that he has been  advised he has 21
days to review the waivers and  releases  contained  in this  Agreement if he so
chooses.

         23. Adequacy Of Consideration

            Richard A. Sandberg  acknowledges that the commitments,  waivers and
releases he gives in this  Agreement are in exchange for valuable  consideration
to which he is not otherwise entitled.

         24. Revocation Option

         Richard A.  Sandberg  shall have seven (7) days after the  execution of
this  Agreement  to revoke the waivers and  releases in this  Agreement  and the
Agreement  shall not be  effective  unless and until  those  seven (7) days have
lapsed without Richard A. Sandberg so revoking.

         25. Entire Agreement

         This Agreement  constitutes the entire  Agreement of the parties on the
subject   matter   hereof  and   supersedes   any  and  all  prior   agreements,
understandings or commit-ments,  oral or written,  including without limitation,
the Executive  Severance  Agreement  between the Company and Richard A. Sandberg
dated March 9, 1989.




         26. Governing Law

         This  Agreement  shall  be  governed  by  the  laws  of  the  State  of
Connecticut.

                                          RICHARD A. SANDBERG




      2/27/97                                  /s/Richard A. Sandberg
- --------------------------                -------------------------------------
Dated                                     Signature



                                          DIANON SYSTEMS, INC.




     2/27/97                                     /s/Kevin C. Johnson
- --------------------------                -------------------------------------
Dated                                     Signature




/29203





                                                                    Attachment A




Mr. Richard A. Sandberg


Dear Richard:

The law  requires us to inform you in writing  that you should  consult a lawyer
before executing the Agreement we have proposed to become effective  between you
and the Company on February 27, 1997,  because it includes  releases and waivers
of potential rights.

Sincerely,

/s/Kevin C. Johnson

Kevin Johnson