Unballoted STU Update Publication of HL7 FHIR® Implementation Guide: Payer Data Exchange (PDex), Release 2.2.0 – US Realm
Learn more at https://www.hl7.org/implement/standards/product_brief.cfm?product_id=550 or see the specification at
http://hl7.org/fhir/us/davinci-pdex/STU2.2