For example, HL7 (Health Level Seven International) is a set of standards, formats and definitions for the exchange, management and integration of data that supports clinical patients. health care and the management, delivery and evaluation of health care services. The HL7 standards, developed and promulgated by the health IT standards authority HL7 International, are the de facto standards in health IT, although some HL7 users have called on Congress to create standards stricter legal interoperability requirements for the healthcare IT sector. The EHR system functional model created by HL7 includes advanced decision support functionality for the healthcare industry. Designed to contribute to national interoperability of health IT systems. This model is designed to provide guidance to healthcare professionals as well as healthcare-related researchers in the preparation, acquisition and transition of EHRs. The updated version of HL7 enabled interoperability between electronic patient administration systems (PAS), electronic practice management systems (EPM), laboratory information systems (LIS), systems dietary, pharmaceutical and billing as well as the electronic medical record (EMR) or electronic health record (EHR)