HL7 Version 3 Standard: Patient Administration; Patient Registry, Release 1 received reaffirmation approval on 2019-06-07.
The Patient topic defines messages exchanged with Patient Registries. The Patient information model is not limited to persons; any type of living subject can be registered as a patient. The model includes full information about the living subject playing the role of patient. The model also includes relationships between the patient and healthcare providers who have primary care and/or preferred care responsibility for the patient.
The Patient Administration domain defines person and patient demographics and visit information about patients. Generally, information is entered into a Patient or Person Registry or into a Patient Administration system and passed to other systems (e.g., other registries, clinical, ancillary and financial systems).
For more information see https://www.hl7.org/implement/standards/product_brief.cfm?product_id=311