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                                                                    EXHIBIT 2.2




                              State of Delaware
                                                                          PAGE 1
                       Office of the Secretary of State

                       --------------------------------

     I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO HEREBY
CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF MERGER,
WHICH MERGES:

     "HDSSUB, INC.", A DELAWARE CORPORATION,

     WITH AND INTO "HEALTH DATA SCIENCES CORPORATION" UNDER THE NAME OF "HEALTH
DATA SCIENCES CORPORATION", A CORPORATION ORGANIZED AND EXISTING UNDER THE LAWS
OF THE STATE OF DELAWARE, AS RECEIVED AND FILED IN THIS OFFICE THE FIRST DAY OF
JULY, A.D. 1996, AT 8:30 O'CLOCK A.M.
     
     A CERTIFIED COPY OF THIS CERTIFICATE HAS BEEN FORWARDED TO THE NEW CASTLE
COUNTY RECORDER OF DEEDS FOR RECORDING.




                                  /s/ Edward J. Freel                    
                                  ------------------------------------   
                   [SEAL]         Edward J. Freel, Secretary of State    
                                                                         
                                                                         
                                  AUTHENTICATION:    8010526             
                                                                         
                                            DATE:    07-01-96            
                                                                         
                                                                         





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                        DELAWARE CERTIFICATE OF MERGER
                                      OF
                                 HDSSUB, INC.
                                WITH AND INTO
                       HEALTH DATA SCIENCES CORPORATION



                           ========================



    The undersigned corporation, organized and existing under and by virtue of
the Delaware General Corporation Law (the "DGCL"), DOES HEREBY CERTIFY:

    1.  HDSSub, Inc. ("HDSSub"), a Delaware corporation, is merging with and
into Health Data Sciences Corporation ("HDS"), a Delaware corporation (the
"Merger").

    2.  The Amended and Restated Merger Agreement has been approved, adopted,
certified, executed and acknowledged by HDS and HDSSub, in accordance with
Section 251(c) of the DGCL.

    3.  HDS will be the surviving Delaware corporation following the Merger,
using the name "Health Data Sciences Corporation."

    4.  The Certificate of Incorporation of HDS will, as amended pursuant to
this Certificate of Merger, continue after the Merger as the Certificate of
Incorporation of the surviving corporation until thereafter duly amended in
accordance with its terms and the DGCL.

    5.  The executed Amended and Restated Merger Agreement pursuant to which
the Merger is being consummated is on file at the principal place of business
of the surviving corporation.  The address of the principal place of business
of the surviving corporation is c/o Medaphis Corporation, 2700 Cumberland
Parkway, Suite 300, Atlanta, Georgia 30339.

    6.  A copy of the Amended and Restated Merger Agreement will be furnished
by the surviving corporation, on request and without cost, to any stockholder
of any constituent corporation.

    7.  Article 4 of HDS's Certificate of Incorporation is hereby amended to 
read in full as follows:

      "The aggregate number of shares that the Corporation shall have authority
      to issue is 1,000, all of which shall be shares of common stock, par value
      $0.01 per share."



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        IN WITNESS WHEREOF, HDS has caused its duly authorized officer to
execute and deliver this Certificate of Merger as of the 29th day of June, 1996.

                               HEALTH DATA SCIENCES CORPORATION
                             
                             
                             
                               By:  /s/ Ralph A. Korpman, M.D.
                                   ------------------------------
                                   Name: Ralph A. Korpman, M.D.
                                   Title: Chairman and Chief Executive Officer
                             

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