SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                  SCHEDULE 13D
                    Under the Securities Exchange Act of 1934

                                (AMENDMENT NO. 9)

                              Quality Systems, Inc.
                              ---------------------
                                (Name of Issuer)

                                  Common Stock
                                  ------------
                         (Title of Class of Securities)


                                    747582104
                                    ---------
                                 (CUSIP Number)

                              Paul W. Sweeney, Esq.
                 KIRKPATRICK & LOCKHART PRESTON GATES ELLIS LLP
                          10100 Santa Monica Boulevard
                                  Seventh Floor
                              Los Angeles, CA 90067
                                 (310) 552-5000
                                 --------------
       (Name, Address and Telephone Number of Person Authorized to Receive
                           Notices and Communications)

                                  May 27, 2008
                                  ------------
             (Date of Event which Requires Filing of this Statement)


If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  that is the subject of this  Schedule  13D, and is filing this
schedule because of ss.ss.240.13d-1(e),  240.13d-1(f) or 240.13d-1(g), check the
following box. [ ]

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).



1.   NAME OF REPORTING PERSONS Ahmed Hussein


2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

3.   SEC USE ONLY

4.   SOURCE OF FUNDS PF

5.   CHECK BOX IF DISCLOSURE OF LEGAL  PROCEEDINGS IS REQUIRED  PURSUANT TO ITEM
     2(d) OR 2(e)

6.   CITIZENSHIP OR PLACE OF ORGANIZATION
     United States and Egypt

7.   SOLE VOTING POWER
     4,651,600*

8.   SHARED VOTING POWER
     0

9.   SOLE DISPOSITIVE POWER
     4,651,600*

10.  SHARED DISPOSITIVE POWER
     0

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     4,651,600*

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

13.  PERCENT  OF CLASS  REPRESENTED  BY  AMOUNT  IN ROW (11)
     16.62% (based on 27,392,965  shares of Common Stock outstanding on December
     19, 2007,  according to the Company's  Quarterly  Report on Form 10-Q filed
     with the SEC on February 7, 2008).

14.  TYPE OF REPORTING PERSON
     IN

-----------
*Includes options to purchase 44,000 shares.

                                       2


INTRODUCTION

This Amendment No. 9 ("Amendment No. 9") amends  Amendment No. 8 to the Schedule
13D  filed  with  the  Securities  and  Exchange  Commission  on July  30,  2007
("Amendment  No. 8") by Ahmed Hussein (the "Reporting  Person")  relating to the
shares of common  stock,  par value  $.01 per share  (the  "Common  Stock"),  of
Quality Systems, Inc., a California corporation (the "Company") in the following
respects:

ITEM 4.  PURPOSE OF TRANSACTION

In Amendment  No. 8, the  Reporting  Person  disclosed  his  concerns  about the
structure  of the  Board of  Directors  of the  Company  (the  "Board")  and the
corporate governance of the Company under the control of the Chairman.  In 2006,
the Reporting Person indicated to the Company that he intended to nominate three
individuals  (the  "Hussein  Nominees")  to stand for election to the  Company's
Board at its 2006  Annual  Meeting of  Shareholders  and to  solicit  proxies in
support of their election.  After being  approached by the Company,  the Company
and the Reporting  Person  entered into a settlement  agreement  dated August 8,
2006 (the  "Settlement  Agreement")  whereby the Company  agreed to nominate the
Hussein  Nominees  for  election  to the  Board at the 2006  Annual  Meeting  of
Shareholders and the 2007 Annual Meeting of Shareholders (together,  the "Annual
Meetings").   In  exchange,  the  Reporting  Person  agreed  in  the  Settlement
Agreement,  among other  things,  to refrain  from  submitting  any  shareholder
proposal or director  nominations  at the Annual  Meetings and to terminate  his
pending  litigation,  which was then on appeal,  with the Company concerning the
election of  directors  in  connection  with the 2005 annual  meeting.  Prior to
entering into the Settlement  Agreement,  the Reporting Person told the Company,
that the  Reporting  Person had the  following  expectations  as a result of the
Settlement Agreement:

     1)   removal of the Company's present legal counsel;

     2)   keeping accurate board and committee minutes,  which could be achieved
          by  taping,  stenographing,  or the  taking of the  minutes by a third
          party acceptable to both sides;

     3)   balancing the standing  independent  directors  committees  and making
          sure they are not controlled by the Chairman or management; and

     4)   the Chairman, under the Settlement Agreement,  conducting himself in a
          way consistent with the status of an independent director.

The  Settlement  Agreement was drafted by the Company's  lawyers.  The Reporting
Person entered into the Settlement  Agreement in good faith. After the new Board
was elected pursuant to the Settlement Agreement,  the Reporting Person believes
that the  Chairman's  interpretation  of the  Settlement  Agreement was to allow
himself total control of the independent  directors'  committees and the ability
to keep present counsel and to engage other counsel of his choosing.

The  Reporting  Person's  advisors  informed  the  Company's  lawyers  that  the
interpretation  of the  Settlement  Agreement  by  the  Chairman,  supported  by
management and the directors he had nominated to the Board, was unreasonable and
inconsistent with the Reporting  Person's  announced  intentions when he entered
into the Settlement Agreement.

                                       3


The Reporting  Person's  advisors  explained  that, if accepted,  the Chairman's
interpretation  of the Settlement  Agreement would have meant that the Reporting
Person would have given up his claims  against the Chairman and other  directors
involved in exchange for no material consideration.  Obviously, that was not the
Reporting  Person's  intention.  The Reporting Person's advisors further pointed
out that any ambiguity in the interpretation of the Settlement Agreement must be
resolved  in the  Reporting  Person's  favor,  as a  matter  of law,  since  the
Company's lawyers were the ones who drafted the Settlement Agreement.

The Company described its understanding of the terms of the Settlement Agreement
in its Proxy Statement filed with the Securities and Exchange Commission on July
9,  2007.  The  Company's   interpretation   of  the  Settlement   Agreement  is
substantially  different from the  understanding of the Reporting Person when he
entered into the  Settlement  Agreement.  The  Reporting  Person  disputed  (and
continues  to dispute)  the  Company's  interpretation.  In order to resolve the
dispute, the Reporting Person offered to enter into binding arbitration with the
Company.  The Company did not  respond in any  material  fashion to the offer of
binding  arbitration  nor did it provide  the  Reporting  Person with all of the
information he and other minority directors requested.

The Reporting  Person remains  concerned  about the corporate  governance of the
Company  and the  structure  of the  Board of  Directors.  One of the  Reporting
Person's concerns is the Company's legal counsel.  The lawyer that the Reporting
Person  intended to be removed as the  Company's  counsel  under the  Settlement
Agreement  was not  removed.  Instead,  he continued to work for the Company and
assumed the various  responsibilities of corporate counsel,  Board counsel,  and
general counsel. The lawyer also acted as corporate secretary.  To the Reporting
Person's  knowledge,  even though he assumed these various roles, the lawyer has
no written  contract  with the  Company  that  defines his  relationship  to the
Company  or spells  out his  duties  and  responsibilities.  The lawyer has also
represented  the  Chairman  and other  Board  members  and was  involved  in the
formation of a Special  Committee that continues to operate after the Settlement
Agreement, and the Reporting Person believes that that seems designed to prevent
the Reporting Person from raising any corporate  governance  issues. The Special
Committee  lacks  transparency  and fails to  divulge  its  minutes to the other
members of the Board. The Reporting  Person believes that the Special  Committee
operates in direct  conflict with open  governance  and  functions  autonomously
without  any  supervision  by the rest of the Board of the  Directors.  It is an
example  of the need for a balanced  Board and  balanced  committees  as well as
impartial legal counsel.

Despite the Reporting  Person's efforts,  The Reporting Person believes that the
Board minutes  continue to be  inaccurate,  incomplete,  and  misleading.  These
minutes are not acceptable to the Reporting Person and to the directors that the
Reporting  Person has nominated to the Board.  A call to tape or stenograph  the
meeting minutes was rejected by the Board. The Chairman, supported by management
and the  directors  he  nominated  to the Board,  refused to allow the  minority
shareholders an expression of their views to be added to the minutes in writing.
The Chairman and his directors have also refused to allow the Reporting Person's
lawyer to attend certain meetings of the Board.

It is the  Reporting  Person's  opinion  that even if taken at face  value,  the
minutes of the Board meetings amply demonstrate:

                                       4


     1)   The Board's  inability  to govern the  Company or oversee  management,
          given the  control by the  Chairman  over the  independent  directors.
          Change in management favored by almost all the independent  directors,
          and that was even promised by the Chairman,  was not implemented.  The
          Chairman  said  that it was not the right  time to do so,  but gave no
          rationale for his change of mind and no time table.

     2)   The  inability  of the Board to address  the status of the  Chairman's
          independence,  independently of the Chairman. The Reporting Person and
          the directors who were nominated by him realize the Chairman's actions
          are totally inconsistent with the Chairman's claim of the status of an
          independent director. They called for an independent evaluation of the
          status of the  Chairman.  The  Board has  refused,  and  continues  to
          refuse, to address the issue in any material way.

     3)   The Chairman on numerous  occasions acted in a controlling,  executive
          fashion  without the Board's  knowledge.  The  Chairman's  actions are
          totally  inconsistent  with his claim of independence.  Management and
          the directors  nominated to the Board by the Chairman acted  zealously
          to cover up for the Chairman's actions.

     4)   Correspondence by the Reporting Person and others raising the issue of
          the Chairman's  independence and his executive actions was attacked on
          a personal  level by one of the  directors  nominated by the Chairman.
          This  particular   director  attacked  other  directors'   competence,
          integrity, and motives in raising governance issues.

          This particular  director  alleged that the Reporting  Person violated
          certain laws when the Reporting  Person chaired the Audit Committee of
          the Company.

          The  Reporting  Person  explained to the  directors  that they legally
          could  not allow  such an  unfounded  accusation  and that they had to
          investigate  this director's  claims in order to safeguard the Company
          and to satisfy  disclosure  requirements if there are grounds for such
          unfounded accusation. The Chairman and those directors he nominated to
          the Board voted  against  requiring  this  director  to  disclose  the
          alleged  basis  of his  unfounded  accusation.  Instead  of  receiving
          reasonable  answers,  the Reporting  Person received some threats from
          this director and from the Special Committee discussed above.

     5)   The agenda of the Board meetings and minutes are controlled. The Board
          meetings are conducted by the Chairman to allow no viable dissent. The
          Chairman  uses his  controlling  position to  effectively  silence all
          opposing opinions at Board meetings.  He does so by, among other ways,
          not allowing  adequate  time for  questions,  regularly  declaring the
          Reporting  Person  to be out of  order,  refusing  to let  him  speak,
          refusing to answer his  questions,  and  threatening to eject him from
          Board  meetings  and from the Board.  The  lawyers  for the  Reporting
          Person received hostile  correspondence  from the lawyer  representing
          the Special Committee.

     6)   The Company  failed to develop a coherent  strategy and business  plan
          approved by the Board.  The Reporting  Person fails to understand  the
          business  justification or underlying concepts for the budget approved
          by the Board.

                                       5


     7)   Failure to meet performance targets is not addressed in a material way
          by the  Board.  Instead,  the  Board is  willing  to  increase  equity
          compensation for management, as described below.

     8)   The Board  fails to discuss why the  Company  headquarters,  its legal
          representation and its board and committee meetings are held in Orange
          County,  California,  when in excess of 90% of the  business is on the
          East Coast.

In fiscal year 2007, the  independent  directors voted 4-3, in favor of awarding
management  significantly  more  options ten months into the fiscal year without
changing  the  previously  set  business  goals  to be  met by  management.  The
Chairman,  who the Reporting  Person as well as other  directors  believe should
clearly not be considered independent, cast the deciding vote.

The Reporting Person believes that:

1) Disclosure to the  shareholders of this change in  management's  compensation
was unsatisfactory because it was lacking in clarity. The Reporting Person could
see no business reason to  significantly  alter the number of options awarded to
management,   given  that  the   performance  of  the  Company  failed  to  meet
projections.

2) The  growth  of the  Company  has  suffered  from  abuse of  governance.  The
Reporting Person and the directors that he nominated to the Board,  felt concern
about the legality of changing the number of options  awarded to management  ten
months into the year.

The Reporting  Person believes that the Chairman has recently  solicited a major
transaction for the Company, and involved at least one member of management. The
Chairman's actions appear to have spanned three or four months without informing
the Board or the  Transaction  Committee.  There was no prior  discussion by the
Transaction Committee or the Board about the possibility of such a transaction.

The directors did not question the Chairman's  apparent  unilateral  actions and
hastily responded by forming a Special Committee  composed of the Chairman,  the
CEO of the Company, the President of the NextGen Healthcare  Information Systems
division, and another director, to handle the transaction.  The Reporting Person
considers the formation of this committee to handle this particular  transaction
to be a clear violation of the Bylaws of the Company.

The new Special Committee employed lawyers and other professionals.  The Special
Committee  did not give  progress  reports  when  asked.  The  Reporting  Person
understands now that the potential  transaction has been aborted.  The Reporting
Person is still  trying to  evaluate  the  possible  damage  this event may have
caused.

The Company's lawyers consistently denied information requested by the Reporting
Person or his lawyers,  which the Reporting Person feels is necessary to fulfill
his fiduciary  responsibilities and to protect his interests and the interest of
shareholders, other than the Chairman.

In another recent transaction,  the Board authorized the President of NextGen to
act as the  Transaction  Committee  of the Board over  strong  objection  by the
Reporting  Person, as the chair of the Transaction  Committee.  The President of

                                       6


NextGen  proceeded to conclude a transaction  that was hastily rubber stamped by
the Transaction Committee and the Board.

The Reporting  Person,  as well as the directors who were nominated to the Board
by the  Reporting  Person,  believes  that  the  transaction  was  conducted  by
management and improperly  supervised by the Chairman.  While the Chairman,  the
CEO of the  Company,  and the  President  of NextGen  had ample  opportunity  to
conduct their due diligence, other members of the Board, including the Reporting
Person as the Chairman of the Transaction Committee,  were denied the ability to
fulfill their fiduciary function.

The transaction was ultimately consummated at an extremely large multiple of the
unaudited 2007 EBITDA.  Company  management  justified the transaction  based on
unusually high  expectations for performance in 2008 but nevertheless  paid over
90% of the  maximum  possible  price up  front.  Ancillary  costs  for  employee
retention  contracts plus incentive  options will be incurred in addition to the
sale price.

The final vote by the Board was 5-3 with  management,  the Chairman,  and two of
his nominees  voting for the  transaction  that was not overseen in any material
way by the independent  directors.  The transaction did not have the approval of
the majority of the  independent  directors of the Company at the board meeting,
where the transaction was approved.

The Reporting  Person  believes that the  Chairman's  executive and  controlling
actions  are  totally  inconsistent  with his  claim  of  being  an  independent
director.

The Chairman is the chair of the  Nominating  Committee.  The  Chairman  will be
controlling  the  nominating  process.  The  Reporting  Person  does not plan to
support the slate of directors nominated by the Company.

The Reporting Person holds the Common Stock for investment. The Reporting Person
does not have any present plan or proposal that would relate to or result in any
of the matters set forth in  subparagraphs  (a) - (j) of Item 4 of Schedule 13D,
except  as set  forth  herein.  The  Reporting  Person  intends  to  review  his
investment in the Company on a continuing  basis.  Depending on various  factors
including,  without  limitation,  the Company's  financial  performance  and his
investment  strategy,  the price levels of the Common  Stock,  conditions in the
securities  markets  and  general  economic  and  industry  conditions,   future
developments  at the  Company,  his views of the manner in which the  Company is
governed in the future,  and he may in the future take such actions with respect
to his  investment  in the Company as he deems  appropriate  including,  without
limitation:

o  continuing to hold his shares for investment;

o  purchasing additional shares of Common Stock;

o  selling some or all of his shares;

o  commencing legal proceedings against certain directors of the Company;

                                       7


o  continuing to call on the present  independent  directors  of  the Company to
investigate the Chairman's independence, independently of the Chairman;

o  continuing to call on the Company's directors to tape or stenograph the Board
meetings or to assign the job of corporate  secretary  to a neutral  third party
acceptable to all directors;

o  pursuing  discussions  with other shareholders  and third  parties  regarding
alternatives  for  corporate  governance  involving  the  Company or to maximize
shareholder value therein;

o  seeking to change  the  composition of and/or seek further  representation on
the Board and solicit proxies or written consents from other shareholders of the
Company; or

o  changing  his intention  with respect to any and  all matters referred  to in
this Item 4.

                                       8


                                    SIGNATURE

After  reasonable  inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Dated:  May 27, 2008.


                                    /s/ Ahmed Hussein
                                    --------------------------
                                    Ahmed Hussein