HORSHAM, Pa.--(BUSINESS WIRE)--NextGen Healthcare Information Systems, LLC., a wholly owned subsidiary of Quality Systems, Inc. (NASDAQ: QSII) and a leading provider of healthcare information systems and connectivity solutions, today announced it is amongst the first Healthcare Information Technology (HIT) vendors to achieve full accreditation with the Practice Management System Accreditation Program (PMSAP) from the Electronic Healthcare Network Accreditation Commission (EHNAC). EHNAC’s PMSAP