The Office of the National Coordinator (ONC) releases periodic proposed rules, and final rules, which reference the use of Consolidated CDA (C-CDA). The Companion Guide to Consolidated Clinical Document Architecture (C-CDA) provides supplemental guidance.
As part of the response to COVID-19, a coalition of health and technology leaders has created the Vaccination Credential Initiative (VCI). VCI is committed to empowering individuals access to a trustworthy and verifiable copy of their vaccination records in digital or paper form using open, interoperable standards
The US Core Implementation Guide is based on FHIR Version R4 and defines the minimum set of constraints on the FHIR resources to create the US Core Profiles. It also defines the minimum set of FHIR RESTful interactions for each of the US Core Profiles to access patient data.