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                                                                   EXHIBIT 10(b)


                                                                  EXECUTION COPY

                                 FIRST AMENDMENT

                  FIRST AMENDMENT, dated as of March 30, 1999 (this
"Amendment"), to the Credit Agreement, dated as of July 10, 1998 (the "July 1998
Credit Agreement"), among COLUMBIA/HCA HEALTHCARE CORPORATION, a Delaware
corporation (the "Company"), the several banks and other financial institutions
from time to time parties hereto (the "Banks"), BANK OF AMERICA NATIONAL TRUST
AND SAVINGS ASSOCIATION, THE BANK OF NEW YORK, THE FIRST NATIONAL BANK OF
CHICAGO, FLEET NATIONAL BANK, TORONTO DOMINION (TEXAS), INC. AND WACHOVIA BANK
OF GEORGIA, N.A. as Co-Agents (collectively, the "Co-Agents"), NATIONSBANK,
N.A., as documentation agent for the Banks hereunder (the "Documentation Agent")
and THE BANK OF NOVA SCOTIA and DEUTSCHE BANK SECURITIES INC., as co-syndication
agents for the Banks hereunder (the "Co-Syndication Agents"); and THE CHASE
MANHATTAN BANK, a New York banking corporation, as agent for the Banks hereunder
(in such capacity, the "Agent").

                              W I T N E S S E T H :

                  WHEREAS, the parties hereto wish to amend certain provisions
of the July 19998 Credit Agreement on the terms set forth herein;

                  NOW, THEREFORE, in consideration of the premises and of the
mutual agreements herein contained, the parties hereto agree as follows:

                  1. Definitions. Unless otherwise defined herein, terms defined
in the July 1998 Credit Agreement shall be used as so defined.

                  2. Amendment to Section 1.1 of the July 1998 Credit Agreement.
Section 1.1 of the July 1998 Credit Agreement is hereby amended as follows:

                  (a) by inserting in such section the following new defined
     terms in proper alphabetical order:

                      "'First Amendment': First Amendment dated March 30, 1999 
                  to the Agreement."

                      "'LifePoint': LifePoint Hospitals, Inc., a Delaware
                  corporation to be formed."

                      "'Triad': Triad Hospitals, Inc., a Delaware corporation to
                  be formed."

                  (b) by deleting the defined term "Subsidiary" in its entirety
     and inserting in lieu thereof the following new defined term in proper
     alphabetical order:

                      "'Subsidiary': as to any Person, a corporation, 
                   partnership or other entity of which shares of stock or
                   other ownership interests having ordinary voting power
                   (other than stock or such other ownership interests having
                   such power only

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                  by reason of the happening of a contingency) to elect a
                  majority of the board of directors or other managers of such
                  corporation, partnership or other entity are at the time
                  owned, directly or indirectly through one or more
                  intermediaries, by such Person. Unless otherwise qualified,
                  all references to a "Subsidiary" or to "Subsidiaries" in this
                  Agreement shall refer to a Subsidiary or Subsidiaries of the
                  Company.".

                  3. Amendment to Section 3.12 of the July 1998 Credit
Agreement. Section 3.12 of the July 1998 Credit Agreement is hereby amended by
deleting the following sentence:

                  "Neither the Company nor any Subsidiary nor any Control Group
                  Person maintains, contributes to or participates in any Plan
                  that is a "defined benefit plan" as defined in ERISA."

                  4. Amendment to Section 3.17 of the July 1998 Credit
Agreement. Section 3.17 of the July 1998 Credit Agreement is hereby amended by
inserting the following clause immediately following the words "September 30,
1999":

                  ", except where the failure to do so could not reasonably be
                  expected to result in a material adverse change in the
                  business or assets or in the condition, financial or
                  otherwise, of the Company and its Subsidiaries on a
                  consolidated basis."

                  5. Amendment to Section 4.3 of the July 1998 Credit Agreement.
Section 4.3 of the July 1998 Credit Agreement is hereby amended by deleting such
section in its entirety and substituting in lieu thereof the following:

                     "4.3 Company Officers' Certificate. The representations and
                  warranties contained in Section 3 (as qualified by the
                  disclosures in (i) the Company's Annual Report on Form 10-K
                  for its fiscal year ended December 31, 1997, (ii) the
                  Company's Quarterly Reports on Form 10-Q for its fiscal
                  quarters ended March 31, 1998, June 30, 1998 and September 30,
                  1998, (iii) the Company's Reports on Form 8-K dated February
                  6, 1998, February 13, 1998, March 6, 1998, May 27, 1998, July
                  30, 1998, October 28, 1998, December 15, 1998 and February 24,
                  1999 and (iv) the Company's Annual Report on Form 10-K for its
                  fiscal year ended December 31, 1998, as filed with the
                  Securities and Exchange Commission, previously distributed to
                  the Agent and made available to the Banks) shall be true and
                  correct in all material respects on the Closing Date and on
                  and as of each Borrowing Date with the same force and effect
                  as though made on and as of such date; no Default shall have
                  occurred (except a Default which shall have been waived in
                  writing or which shall have been cured) and no Default shall
                  exist after giving effect to the Loan to be made; between
                  December 31, 1997 and such Borrowing Date, neither the
                  business nor assets, nor the condition, financial or
                  otherwise, of the Company and its Subsidiaries on a
                  consolidated basis shall have been adversely affected in any
                  material manner as a result of any fire, flood, explosion,
                  accident, drought, strike, lockout, riot, sabotage,
                  confiscation,

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                  condemnation, or any purchase of any property by Governmental
                  Authority, activities or armed forces, acts of God or the
                  public enemy, new or amended legislation, regulatory order,
                  judicial decision or any other event or development whether or
                  not related to those enumerated above (all subject to the
                  disclosures enumerated above); and the Agent shall have
                  received a certificate containing a representation to these
                  effects dated such Borrowing Date and signed by a Responsible
                  Officer.".

                  6. Amendment to Section 5.3 of the July 1998 Credit Agreement.
Section 5.3 of the July 1998 Credit Agreement is hereby amended by deleting such
section in its entirety and substituting in lieu thereof the following:

                     "5.3 Transactions with Affiliates. Neither the Company nor
                  any of its Subsidiaries will enter into any transactions,
                  including, without limitation, the purchase, sale or exchange
                  of property or the rendering of any service, with any of their
                  Affiliates (other than the Company and its Subsidiaries)
                  (excluding the tax-free spin-off distributions of the common
                  stock of Life Point and Triad to the shareholders of the
                  Company and the transitional services agreements to be entered
                  into with LifePoint and Triad in connection therewith) unless
                  such transaction is otherwise permitted under this Agreement,
                  is in the ordinary course of the Company's or such
                  Subsidiary's business and is upon fair and reasonable terms no
                  less favorable to the Company or such Subsidiary, as the case
                  may be, than it would obtain in an arm's-length transaction.".

                  7. Amendment to Section 5.5 of the July 1998 Credit Agreement.
Section 5.5 of the July 1998 Credit Agreement is hereby amended by deleting
subsection 5.5(d) in its entirety and substituting in lieu thereof the
following:

                     "(d) ERISA Reports. The Company will furnish the Agent with
                  copies of any request for waiver of the funding standards or
                  extension of the amortization periods required by Sections
                  303 and 304 of ERISA or Section 412 of the Code promptly
                  after any such request is submitted by the Company to the
                  Department of Labor or the Internal Revenue Service, as the
                  case may be. Promptly after a Reportable Event occurs, or
                  the Company or any of its Subsidiaries receives notice that
                  the PBGC or any Control Group Person has instituted or
                  intends to institute proceedings to terminate any pension or
                  other Plan that is a "defined benefit plan" as defined in
                  ERISA, or prior to the Plan administrator's terminating such
                  Plan pursuant to Section 4041 of ERISA, the Company will
                  notify the Agent and will furnish to the Agent a copy of any
                  notice of such Reportable Event which is required to be
                  filed with the PBGC, or any notice delivered by the PBGC
                  evidencing its institution of such proceedings or its intent
                  to institute such proceedings, or any notice to the PBGC
                  that a Plan is to be terminated, as the case may be. The
                  Company will promptly notify each Bank upon learning of the
                  occurrence of any of the following events with respect to
                  any Plan which is a Multiemployer Plan: a partial or
                  complete withdrawal from any Plan which may


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                  result in the incurrence by the Company or any of is
                  Subsidiaries of withdrawal liability in excess of $1,000,000
                  under Subtitle E of Title IV of ERISA, or of the termination,
                  insolvency or reorganization status of any Plan under such
                  Subtitle E which may result in liability to the Company or any
                  of its Subsidiaries in excess of $1,000,000. In the event of
                  such a withdrawal, upon the request of the Agent or any Bank,
                  the Company will promptly provide information with respect to
                  the scope and extent of such liability, to the best of the
                  Company's knowledge.

                  8. Amendment to Section 5.9 of the July 1998 Credit Agreement.
Section 5.9 of the July 1998 Credit Agreement is hereby amended by inserting the
following clause at the end of the paragraph immediately following the words
"United States":

                  "or causing the Company to change its name."

                  9. Amendment to Section 5.10 of the July 1998 Credit
Agreement. Section 5.10 of the July 1998 Credit Agreement is hereby amended by
deleting such section in its entirety and substituting in lieu thereof the
following:

                     "5.10 Sales of Assets. The Company and its Subsidiaries may
                  from time to time sell or otherwise dispose of all or any
                  part of their respective assets; provided, however, that in
                  any fiscal year, the Company and its Subsidiaries will not
                  (a) sell or dispose of (including, without limitation, any
                  disposition resulting from any merger or consolidation
                  involving a Subsidiary of the Company, and any Sale-and-
                  Leaseback Transaction), outside of the ordinary course of
                  business, to Persons other than the Company and its
                  Subsidiaries, assets constituting in the aggregate more than
                  12% of Consolidated Assets of the Company (calculated after
                  giving pro forma effect thereto as if the tax-free spin-off
                  distributions of the common stock of LifePoint and Triad to
                  the shareholders of the Company occurred on the first day of
                  the testing period thereof) and its Subsidiaries as at the
                  end of the immediately preceding fiscal year (excluding the
                  tax-free spin-off distributions of the common stock of
                  LifePoint and Triad to the shareholders of the Company) and
                  (b) exchange with any Persons other than the Company and its
                  Subsidiaries any asset or group of assets for another asset
                  or group of assets unless (i) such asset or group of assets
                  are exchanged for an asset or group of assets of a
                  substantially similar type or nature, (ii) on a pro forma
                  basis both before and after giving effect to such exchange,
                  no Default or Event of Default shall have occurred and be
                  continuing, (iii) the aggregate fair market value (as
                  determined in good faith by the Board of Directors of the
                  Company) of the asset or group of assets being transferred
                  by the Company or such Subsidiary and the asset or group of
                  assets being acquired by the Company or such Subsidiary are
                  substantially equal and (iv) the aggregate of (x) all assets
                  of the Company and its Subsidiaries sold pursuant to
                  subsection 5.10(a) (including, without limitation, any
                  disposition resulting from any merger or consolidation
                  involving a Subsidiary of the Company, and any Sale-
                  and-Leaseback Transaction) (excluding the tax-free spin-off
                  distributions of the common stock of LifePoint and Triad to
                  the shareholders 

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                  of the Company) and (y) the aggregate fair market value (as
                  determined in good faith by the Board of Directors of the
                  Company) of all assets of the Company and its Subsidiaries
                  exchanged pursuant to this subsection 5.10(b) does not
                  exceed 20% of Consolidated Assets of the Company and its
                  Subsidiaries as at the end of the immediately preceding
                  fiscal year (calculated after giving pro forma effect
                  thereto as if the tax-free spin-off distributions of the
                  common stock of LifePoint and Triad to the shareholders of
                  the Company occurred on the first day of the testing period
                  thereof).".

                  10. Amendment to Section 5.11 of the July 1998 Credit
Agreement. Section 5.11 of the July 1998 Credit Agreement is hereby amended by
deleting such section in its entirety and substituting in lieu thereof the
following:

                      "5.11 Compliance with ERISA. Each of the Company and
                  its Subsidiaries will meet, and will cause all Control Group
                  Persons to meet, all minimum funding requirements applicable
                  to any Plan imposed by ERISA or the Code (without giving
                  effect to any waivers of such requirements or extensions of
                  the related amortization periods which may be granted), and
                  will at all times comply, and will cause all Control Group
                  Persons to comply, in all material respects with the
                  provisions of ERISA and the Code which are applicable to the
                  Plans. At no time shall the aggregate actual and contingent
                  liabilities of the Company under Sections 4062, 4063, 4064 and
                  other provisions of ERISA with respect to all Plans (and all
                  other pension plans to which the Company, any Subsidiary, or
                  any Control Group Person made contributions prior to such
                  time) exceed $7,500,000. Neither the Company nor its
                  Subsidiaries will permit any event or condition to exist which
                  could permit any Plan which is not a Multiemployer Plan to be
                  terminated under circumstances which would cause the lien
                  provided for in Section 4068 of ERISA to attach to the assets
                  of the Company or any of its Subsidiaries."

                  11. Amendment to Section 5.12 of the July 1998 Credit
Agreement. Section 5.12 of the July 1998 Credit Agreement is hereby amended by
deleting the paragraph immediately after clause (f) in its entirety and
substituting in lieu thereof the following:

                  "unless any Loans made and/or to be made to and all other sums
                  payable by the Company under this Agreement shall be secured
                  equally and ratably with (or prior to) such Indebtedness so
                  long as such Indebtedness shall be so secured. Notwithstanding
                  the foregoing, the Company and any one or more Subsidiaries
                  may, without securing the Loans made and/or to be made to and
                  all other sums payable by the Company under this Agreement,
                  create, issue or assume Indebtedness which would otherwise be
                  subject to the foregoing restrictions in an aggregate
                  principal amount which, together with all other such
                  Indebtedness of the Company and its Subsidiaries (not
                  including (i) Indebtedness permitted to be secured pursuant to
                  the foregoing clauses (a) through (f) and the aggregate
                  Attributable Debt or (ii) Indebtedness incurred by one or more
                  Subsidiaries of the 


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                  Company and thereafter assumed by Life Point and/or Triad
                  (and/or their respective Subsidiaries) in connection with
                  the tax-free spin-off distributions of the common stock of
                  LifePoint and Triad to the shareholders of the Company),
                  including Indebtedness in respect of Sale-and-Lease-back
                  Transactions (other than those permitted by subsection
                  5.13(b)), does not exceed 10% of Consolidated Net Tangible
                  Assets of the Company and its Subsidiaries (calculated after
                  giving pro forma effect thereto as if the tax-free spin-off
                  distributions of the common stock of LifePoint and Triad to
                  the shareholders of the Company occurred on the first day of
                  the testing period thereof).".

                  12. Effective Date; Conditions Precedent. This Amendment will
become effective on March 30, 1999 (the "Effective Date") subject to the
compliance by the Company with its agreements herein contained and to the
satisfaction on or before the Effective Date of the following further
conditions:

                      (a) Loan Documents. The Agent shall have received copies
         of this Amendment, executed and delivered by a duly authorized officer
         of the Company, with a counterpart for each Bank, and executed and
         delivered by the Required Banks.

                      (b) Company Officers' Certificate. The representations and
         warranties contained in Section 3 of the July 1998 Credit Agreement
         (as qualified by the disclosures in (i) the Company's Annual Report on
         Form 10-K for its fiscal year ended December 31, 1997, (ii) the
         Company's Quarterly Reports on Form 10-Q for its fiscal quarters ended
         March 31, 1998, June 30, 1998, September 30, 1998 and (iii) the
         Company's Reports on Form 8-K dated February 6, 1998, February 13,
         1998, March 6, 1998, May 27, 1998, July 30, 1998, October 28, 1998,
         December 15, 1998 and February 24, 1998 and (iv) the Company's Annual
         Report on Form 10-K for its fiscal year ended December 31, 1998, as
         filed with the Securities and Exchange Commission, previously
         distributed to the Agent and made available to the Banks) shall be
         true and correct in all material respects on the Effective Date with
         the same force and effect as though made on and as of such date; on
         and as of the Effective Date and after giving effect to this
         Amendment, no Default shall have occurred (except a Default which
         shall have been waived in writing or which shall have been cured); and
         the Agent shall have received a certificate containing a
         representation to these effects dated the Effective Date and signed by
         a Responsible Officer.

                      (c) Fifth Amendment to February 1997 Five-Year Agreement
         and Amendment. The February 1997 Five-Year Agreement and Amendment
         shall have been amended in a manner corresponding to the amendments
         hereof.

                  13. Legal Obligation. The Company represents and warrants to
each Bank that this Amendment constitutes the legal, valid and binding
obligation of the Company, enforceable against it in accordance with its terms,
subject to the effects of bankruptcy, insolvency, fraudulent conveyances,
reorganization, moratorium and other similar laws relating

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to or affecting creditors' rights generally, general equitable principles
(whether considered in a proceeding in equity or at law) and an implied covenant
of good faith and fair dealing.

                  14. Continuing Effect; Application. Except as expressly
amended hereby, the July 1998 Credit Agreement shall continue to be and shall
remain in full force and effect in accordance with its terms.

                  15. Expenses. The Company agrees to pay or reimburse the Agent
for all of its reasonable out-of-pocket costs and expenses incurred in
connection with the development, preparation and execution of, and any
amendment, supplement or modification to, this Amendment and any other documents
prepared in connection herewith, and the consummation of the transactions
contemplated hereby and thereby, including, without limitation, the reasonable
fees and disbursements of counsel to the Agent.

                  16. GOVERNING LAW. THIS AMENDMENT AND THE RIGHTS AND 
OBLIGATIONS OF THE PARTIES UNDER THIS AMENDMENT SHALL BE GOVERNED BY, AND
CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

                  17. Counterparts. This Amendment may be executed by one or
more of the parties to this Amendment on any number of separate counterparts and
all of said counterparts taken together shall be deemed to constitute one and
the same instrument. A set of the copies of this Amendment signed by all the
parties shall be lodged with the Company and the Agent.


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                  IN WITNESS WHEREOF, the parties hereto have caused this
Amendment to be duly executed and delivered by their proper and duly authorized
officers as of the day and year first above written.



                                   COLUMBIA/HCA HEALTHCARE CORPORATION


                                   By: /s/ David G. Anderson
                                      -----------------------------------------
                                       Name: David G. Anderson
                                       Title: Vice President - Finance and
                                              Treasurer



                                   THE CHASE MANHATTAN BANK, as Agent and as a
                                   Bank


                                   By: /s/ Dawn Lee Lum
                                      -----------------------------------------
                                       Name: Dawn Lee Lum
                                       Title: Vice President



                                   ABN AMRO BANK N.V., as a Bank


                                   By: /s/ Steven L. Hipsman
                                      -----------------------------------------
                                       Name: Steven L. Hipsman
                                       Title: Vice President


                                   By: /s/ Robert A. Budnek
                                      -----------------------------------------
                                       Name: Robert A. Budnek
                                       Title: Vice President



                                   BANK OF AMERICA NATIONAL TRUST AND
                                   SAVINGS ASSOCIATION, as Co-Agent


                                   By: /s/ Kevin Wagley
                                      -----------------------------------------
                                       Name: Kevin Wagley
                                       Title: Vice President

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                                   THE BANK OF NEW YORK, as Co-Agent


                                   By: /s/ Ann Marie Hughes
                                      -----------------------------------------
                                       Name: Ann Marie Hughes
                                       Title: Vice President



                                   THE BANK OF NOVA SCOTIA, as Co-Syndication
                                   Agent and as a Bank


                                   By: /s/ W.J. Brown
                                      -----------------------------------------
                                       Name: W.J. Brown
                                       Title: Vice President



                                   DEUTSCHE BANK SECURITIES, INC., as 
                                   Co-Syndication Agent


 By: /s/ Iain Stewart              By: /s/ Steven N. Warden
    --------------------------        -----------------------------------------
     Name: Iain Stewart                Name: Steven N. Warden
     Title: Vice President             Title: Managing Director



                                   DEUTSCHE BANK AG, NEW YORK AND/OR
                                   CAYMAN ISLANDS BRANCH(ES), as a Bank


By: /s/ Stephan A. Wiedemann       By: /s/ Susan L. Pearson
   ---------------------------        -----------------------------------------
    Name: Stephan A. Wiedemann         Name: Susan L. Pearson
    Title: Director                    Title: Director



                                   FIRST AMERICAN NATIONAL BANK, as a Bank


                                   By: /s/ Sandy Hamrick
                                      -----------------------------------------
                                       Name: Sandy Hamrick
                                       Title: Senior Vice President


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                                   THE FIRST NATIONAL BANK OF CHICAGO,
                                   as Co-Agent


                                   By: /s/ L. Richard Schiller
                                      -----------------------------------------
                                       Name: L. Richard Schiller
                                       Title: Vice President



                                   FIRST UNION NATIONAL BANK, as a Bank


                                   By: /s/ Joseph H. Tower
                                      -----------------------------------------
                                       Name:
                                       Title:



                                   FLEET NATIONAL BANK, as Co-Agent


                                   By: /s/ Maryann S. Smith
                                      -----------------------------------------
                                       Name: Maryann Smith
                                       Title: Vice President


                                   KEYBANK NATIONAL ASSOCIATION, as a Bank


                                   By: /s/ Thomas J. Purcell
                                      -----------------------------------------
                                       Name: Thomas J. Purcell
                                       Title: Vice President



                                   NATIONSBANK, N.A. as Documentation Agent 
                                   and as a Bank


                                   By: /s/ Kevin Wagley
                                      -----------------------------------------
                                       Name: Kevin Wagley
                                       Title: Vice President

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                                   SUNTRUST BANK, NASHVILLE, N.A., as a Bank


                                   By: /s/ Mark D. Mattson
                                      -----------------------------------------
                                       Name: Mark D. Mattson
                                       Title: Vice President

               

                                   TORONTO DOMINION (TEXAS), INC., as Co-Agent


                                   By: /s/ Alva J. Jones
                                      -----------------------------------------
                                       Name: Alva J. Jones
                                       Title: Vice President



                                   UNION PLANTERS BANK OF MIDDLE TENNESSEE,
                                   N.A., as a Bank


                                   By: /s/ William A. Collier
                                      -----------------------------------------
                                       Name: William A. Collier
                                       Title: Vice President



                                   WACHOVIA BANK OF GEORGIA, N.A., as Co-Agent


                                   By: /s/ Kenneth Washington
                                      -----------------------------------------
                                        Name: Kenneth Washington
                                        Title: Vice President