| Defining URL | http://terminology.hl7.org/NamingSystem/externalCodeSystems |
| Name | ExternalCodeSystems |
| Status | retired |
| Definition | External coding systems registered in HL7 with an HL7 OID |
| Publisher | HL7 |
| Type | Value | Preferred |
| OID | 2.16.840.1.113883.6 | true |
| URI | http://terminology.hl7.org/CodeSystem/externalCodeSystems | true |