EXHIBIT 21

QUALITY SYSTEMS, INC.

LIST OF SUBSIDIARIES

1. NextGen Healthcare Information Systems, LLC

2. NextGen RCM Services, LLC

3. QSI Management, LLC

4. Quality Systems India Healthcare Pvt. Ltd.

5. ViaTrack Systems, LLC

6. Matrix Management Solutions, LLC

7. Mirth, LLC

8. Mirth Limited

9. Gennius, Inc.