EXHIBIT 31.1 CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER
REQUIRED BY
RULE 13A-14(a) OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED,
AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Steven T.
 Plochocki, certify that:1.
I have reviewed this Form 10-K of Quality Systems, Inc.;2.
Based on my knowledge, this report does not contain any untrue
 statement of a material fact or omit to state a material fact necessary to
 make the statements made, in light of the circumstances under which such
 statements were made, not misleading with respect to the period covered by
 this report;3.
Based on my knowledge, the financial statements, and other
financial
 information included in this report, fairly present in all material respects
 the financial condition, results of operations and cash flows of the
 registrant as of, and for, the periods presented in this report;4.
The registrants other certifying officer(s) and I are
responsible
 for establishing and maintaining disclosure controls and procedures (as
 defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control
 over financial reporting (as defined in Exchange Act Rules 13a-15(f) and
 15d-15(f)) for the registrant and have:(a) Designed such disclosure controls
 and procedures, or caused such disclosure controls and procedures to be
 designed under our supervision, to ensure that material information relating
 to the registrant, including its consolidated subsidiaries, is made known to
 us by others within those entities, particularly during the period in which
 this report is being prepared;(b) Designed such internal control
over
 financial reporting, or caused such internal control over financial reporting
 to be designed under our supervision, to provide reasonable assurance
 regarding the reliability of financial reporting and the preparation of
 financial statements for external purposes in accordance with generally
 accepted accounting principles;(c) Evaluated the effectiveness of
the
 registrants disclosure controls and procedures and presented in this report
 our conclusions about the effectiveness of the disclosure controls and
 procedures, as of the end of the period covered by this report based on such
 evaluation; and(d) Disclosed in this report any
change
 in the registrants internal control over financial reporting that occurred
 during the registrants most recent fiscal quarter (the registrants fourth
 fiscal quarter in the case of an annual report) that has materially affected,
 or is reasonably likely to materially affect, the registrants internal
 control over financial reporting; and5.
The registrants other
certifying
 officer(s) and I have disclosed, based on our most recent evaluation of internal
 control over financial reporting, to the registrants auditors and the audit
 committee of the registrants board of directors (or persons performing the
 equivalent functions):(a) All significant deficiencies and
 material weaknesses in the design or operation of internal control over
 financial reporting which are reasonably likely to adversely affect the
 registrants ability to record, process, summarize and report financial
 information; and(b) Any fraud, whether or not
material,
 that involves management or other employees who have a significant role in
 the registrants internal control over financial reporting.  By: /s/
 Steven PlochockiDate: May
 29, 2009

Steven T.
 Plochocki,Chief
 Executive Officer(Principal
 Executive Officer) 96