[%settitle Defined Systems%] [%file newheader%] [%file newnavbar%] <%txheader systems%>

Code Systems

The following names (URIs) may be used in the system element of the Coding datatype. For URIs specified here for code systems defined as part of FHIR, they SHALL be used in preference to any other identifying mechanisms. If a code system is not listed here, the correct URI may be determined by working through the following list, in order:

• HL7 Terminology's (THO) most recent published version
• THO continuous integration build
• Ask on the HL7 Terminology Services Management Group (TSMG) mailing list

Important Notes:

• This list of names is incomplete and subject to change. Some values may be dropped, and others will likely be added in the coming months as HL7 institutes formal processes around URIs in vocabulary
• The external terminology content provided in the Defined Externally tab is provided for convenience and should not be considered authoritative nor normative.
• Please access the External Code Systems page of HL7 Terminology for authoritative information regarding the correct use of external terminologies with FHIR and other HL7 standards including HL7 endorsed system URI and OID identifiers.
• Any URL in http://example.org is reserved for testing and documentation purposes.

Note that the HL7 code systems are available as FHIR resources - see the Downloads Page (as part of the FHIR definitions).

Don't see what you're looking for here? See Registering Code Systems for further advice.

External Code systems

This is a subset of a much larger list of known code systems, and only details code systems for which FHIR specific usage documentation is provided. For other code systems, see terminology.hl7.org.

Internal Code systems

These code systems are tightly bound to the resource definitions, and a defined by and considered part of FHIR itself.

<%internalsystemlist%>

[%file newfooter%] try { var currentTabIndex = sessionStorage.getItem('fhir-codesystem-tab-index'); } catch(exception){ } if (!currentTabIndex) currentTabIndex = '0'; $( '#tabs' ).tabs({ active: currentTabIndex, activate: function( event, ui ) { var active = $('.selector').tabs('option', 'active'); currentTabIndex = ui.newTab.index(); document.activeElement.blur(); try { sessionStorage.setItem('fhir-codesystem-tab-index', currentTabIndex); } catch(exception){ } } });