EXHIBIT 99.1

CERTIFICATIONS 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, 2002 (the "Report"), the undersigned hereby certifies in his capacity as Chief Executive Officer of the Company, 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 13, 2002                                                            

By: /s/    Patrick L. Johnson                     

             Patrick L. Johnson

             Chief Executive Officer and President

        In connection with the quarterly report on Form 10-Q of Quality Systems, Inc. (the "Company") for the quarterly period ended September 30, 2002 (the "Report"), the undersigned hereby certifies in his capacity as Chief Financial Officer of the Company, 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 13, 2002

By: /s/    JEFFREY J. RITCHEY                                         

             Jeffrey J. Ritchey

             Chief Financial Officer