EXHIBIT 32.1

      CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
                       PURSUANT TO 18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

      In connection with the quarterly report on Form 10-Q of Quality Systems,
Inc. (the "Company") for the quarterly period ended September 30, 2003 (the
"Report"), the undersigned hereby certify in their capacities as Chief Executive
Officer and Chief Financial Officer of the Company, respectively, pursuant to 18
U.S.C. section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley
Act of 2002, that:

      1. the Report fully complies with the requirements of Section 13(a) or
15(d) of the Securities Exchange Act of 1934, as amended; and

      2. the information contained in the Report fairly presents, in all
material respects, the financial condition and results of operations of the
Company.

Dated: November 14, 2003        By: /s/ LOUIS SILVERMAN
                                    --------------------------------------------
                                    Louis Silverman
                                    Chief Executive Officer (Principal Executive
                                    Officer)

Dated: November 14, 2003        By: /s/ PAUL HOLT
                                    --------------------------------------------
                                    Paul Holt
                                    Chief Financial Officer (Principal Financial
                                    Officer)

      A signed original of this written statement required by Section 906, or
other document authenticating, acknowledging, or otherwise adopting the
signatures that appear in typed form within the electronic version of this
written statement required by Section 906, has been provided to the Company and
will be retained by the Company and furnished to the Securities and Exchange
Commission or its staff upon request.


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