Exhibit 10.2.1 - Board Service Agreement - Lou Silverman.

                        [QUALITY SYSTEMS INC. LETTERHEAD]

May 31, 2005

Mr. Lou Silverman
18191 Von Karman Avenue
Suite 450
Irvine, CA 92612

      Re: Board Service Agreement

Dear Lou:

      Congratulations  on your recent  appointment to the Quality Systems,  Inc.
(the "Company")  Board of Directors (the "Board").  This letter will confirm the
agreement  between you and the Company that, in the event your  employment  with
the Company is terminated for any reason,  you shall tender  resignation of your
Board  position  to be  effective  concurrently  with  the  termination  of your
employment.  Your  agreement to resign under the  aforementioned  terms shall be
binding  throughout  your current term as a director and any and all  subsequent
terms.  Your  resignation  shall be  effective  whether or not it is accepted or
acted upon by the Board.

      This letter  agreement is not  intended to alter the existing  terms of an
existing  employment  agreement between you and the Company, if any, and, to the
extent  that  there  is any  inconsistency  between  the  terms  of this  letter
agreement and any such existing  employment  agreement,  the existing employment
agreement shall govern.

      If you agree to the  foregoing,  please  sign below and return one copy of
this letter to the Company's  Secretary,  which  thereupon  shall  constitute an
understanding with respect to the subject matter contained herein and shall be a
binding agreement between you and the Company.

                                             Very truly yours,

                                             QUALITY SYSTEMS, INC.


                                             s/PAUL HOLT
                                             -----------
                                             Paul Holt, Chief Financial Officer

AGREED TO AND ACCEPTED:


s/ LOU SILVERMAN
--------------------------------
Lou Silverman

Date: May 31, 2005