April 23, 2001

Quality Systems Accepted into The Leapfrog Group
TUSTIN, CA — April 23, 2001 — Quality Systems, Inc. (NASDAQ: QSII), today announced that it has joined The Leapfrog Group. The Leapfrog Group is a nationwide initiative sponsored by The Business Roundtable and is a consortium of approximately 80 Fortune 500 companies and other private and public health care purchasers.

The purpose of the group is to advance initiatives designed to help reduce preventable medical errors. The group has selected three areas for its initial focus: implementation of computerized physician order entry; evidence-based hospital referrals; and ICU physician staffing guidelines. Group members have also committed to implement purchasing principles designed to heighten employee awareness in these areas as well as to recognize and reward hospitals who are in compliance.

The Business Roundtable is an association of chief executive officers of leading corporations with a combined workforce of more than 10 million employees in the United States. More information on The Leapfrog Group is available at www.leapfroggroup.org.

Quality Systems, Inc. and its MicroMed division are developers and providers of computer-based practice management, medical records, and e-business applications for medical and dental group practices. Visit www.qsii.com for additional information.

This news release may contain forward-looking statements, including those related to revenue and net income that involve a number of risks and uncertainties. Among the important factors that could impact actual results are volume and timing of systems sales and installations; length of sales cycles and installation process; the possibility that the products will not achieve market acceptance; seasonal patterns of sales and customer buying behavior; the development by competitors of new or superior technologies; delays in product development; undetected errors or bugs in software; product liability; changing economic, political or regulatory influences in the health-care industry; changes in product-pricing policies; competitive pressures; possible regulation of the company's software by the U.S. Food and Drug Administration; general economic conditions; and the risk factors detailed from time to time in Quality Systems' periodic reports and registration statements filed with the Securities and Exchange Commission.