EXHIBIT 10.12


                       SIXTH AMENDMENT TO CREDIT AGREEMENT

     This Amendment, dated as of December 15, 1998 (this "Amendment") is entered
into by and  between  MEDE  AMERICA  CORPORATION,  a Delaware  corporation  (the
"Company")  and BANK OF AMERICA  NATIONAL  TRUST AND  SAVINGS  ASSOCIATION  (the
"Bank").

                                    RECITALS

     The  Company  and the Bank are  parties to a Credit  Agreement  dated as of
December 18, 1995,  as amended (the "Credit  Agreement"),  pursuant to which the
Bank  extended  a  revolving  credit  facility.  Capitalized  terms used and not
otherwise  defined  or  amended  in  this  Amendment  shall  have  the  meanings
respectively assigned to them in the Credit Agreement.

     The Company has requested that the Bank modify the financial  covenants and
waive  non-compliance  with  the  financial  covenants  for  the  period  ending
September 30, 1998. In order to induce the Bank to agree to the  foregoing,  the
Bank has  requested,  and the Company has agreed,  to pay an Amendment  fee. The
Company  has  requested  that the Bank  enter  into this  Amendment  in order to
approve and reflect  the  foregoing,  and the Bank has agreed to do so, all upon
the terms and provisions and subject to the conditions hereinafter set forth.

                                    AGREEMENT

     In  consideration  of the foregoing and the mutual  covenants and agreement
hereinafter set forth, the parties hereto mutually agree as follows:

A.    AMENDMENTS

     1.  Amendment of Section 7.15.  Section 7.15 is hereby amended and restated
as follows:

          7.15 Maximum  Leverage  Ratio.  The Leverage  Ratio at the end of each
     quarterly period shall not exceed the ratio set forth below for the periods
     set forth below:

                  Quarter Ending                Maximum Ratio
                  --------------                -------------

                  September 30, 1998                 3.00
                  December 31, 1998                  6.80
                  March 31, 1999                     6.20
                  June 30, 1999                      4.50
                  September 30, 1999 and
                           and thereafter            4.10





          For purposes of calculating the Leverage Ratio  hereunder,  (i) EBITDA
     shall include EBITDA of the Company and its Subsidiaries adjusted, on a pro
     forma  basis,  to  include  the  EBITDA  for the  applicable  period of any
     business  acquired by the  Company;  and (ii)  Indebtedness  shall  include
     Indebtedness of the Company and its Subsidiaries.

     2.  Amendment of Section 7.16.  Section 7.16 is hereby amended and restated
as follows:

          7.16 Minimum Interest  Coverage Ratio.  The Minimum Interest  Coverage
     Ratio for each  fiscal  quarter  shall not be less than the ratio set forth
     below at the end of each fiscal quarter for the periods set forth below:

                  Quarter Ending                 Maximum Ratio
                  --------------                 -------------

                  September 30, 1998                3.00
                  December 31, 1998                 1.65
                  March 31, 1999                    1.70
                  June 30, 1999                     2.20
                  September 30, 1999
                    and thereafter                  2.30

     For purposes of calculating the Minimum Interest  Coverage Ratio hereunder,
EBITDA and cash interest  expense shall include,  respectively,  EBITDA and cash
interest  expense of the Company and its Subsidiaries  adjusted,  on a pro forma
basis, to include the EBITDA and incremental projected cash interest expenses if
any,  with respect to the  acquisition  of any business  acquired by the Company
during the two fiscal  quarters  prior to the date of calculation of the Minimum
Interest Coverage Ratio.

B.   WAIVER.

     The Company has requested and the Bank has agreed to waive  compliance with
     Sections 7.15 and 7.16 for the period ending September 30, 1998.

C.   REPRESENTATIONS AND WARRANTIES

     The Company hereby represents and warrants to the Bank that:

     1. No Event of Default specified in the Credit Agreement and no event which
with  notice or lapse of time or both would  become such an Event of Default has
occurred and is continuing;

     2. The representations and warranties of the Company pursuant to the Credit
Agreement  are  true on and as of the date  hereof  as if made on and as of said
date;

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     3. The making and  performance  by the Company of this  Amendment have been
duly authorized by all corporate action; and

     4. No consent, approval, authorization,  permit or license from any federal
or state  regulatory  authority  is  required in  connection  with the making or
performance of the Credit Agreement as amended hereby.

D.   CONDITIONS PRECEDENT

     This Amendment will become  effective as of December 15, 1998 provided that
the Bank shall have received in form and substance satisfactory to the Bank, all
of the following:

     1. Executed counterparts of this Amendment.

     2. Payment of an amendment fee in the amount of $54,000.

E.   MISCELLANEOUS

     1. This  Amendment  may be signed in any  number of  counterparts,  each of
which shall be an original,  with same effect as if the  signatures  thereto and
hereto were upon the same instrument.

     2.   Except  as herein  specifically  amended,  all  terms,  covenants  and
provisions  of the Credit  Agreement  shall  remain in full force and effect and
shall be performed by the parties  hereto  according to its terms and provisions
and all  references  therein or in the Exhibits  shall  henceforth  refer to the
Credit Agreement as amended by this Amendment.

     3.   This Amendment  shall be governed by and construed in accordance  with
the laws of the State of New York.


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     IN WITNESS  WHEREOF,  the parties  hereto have executed and delivered  this
Amendment as of the date first written.


                                     MEDE AMERICA CORPORATION

                                     By: _______________________________________

                                     Title: ____________________________________



                                    BANK OF AMERICA NATIONAL TRUST
                                         AND SAVINGS ASSOCIATION

                                     By: _______________________________________

                                     Title: ____________________________________



ACKNOWLEDGED AND AGREED:


WELSH, CARSON, ANDERSON & STOWE V, L.P.


By:   WCAS V PARTNERS
      Its General Partner

      By: ________________________
             Its General Partner



WELCH, CARSON, ANDERSON & STOWE VI, L.P.

By:   WCAS VI PARTNERS
      Its General Partner
      By: __________________________
             Its General Partner












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WILLIAM BLAIR LEVERAGED CAPITAL FUND
  LIMITED PARTNERSHIP

By:      WILLIAM BLAIR LEVERAGED CAPITAL
         MANAGEMENT, L.P.

         By:   WILLIAM BLAIR & COMPANY,
               General Partner

               By: ______________________
















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