| # | Name | Source | Ver | Description | |
| 1 | NamingSystem Check Digit | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | allow for a check digit and a check digit scheme to be conveyed as part of Naming System. The rules of the ID Type determine if the check digit is part of the ID value or sent separately. | |
| 2 | Replaces | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | This indicates a separate conformance resource instance that is superseded by the current instance. | |
| 3 | Resource Approval Date | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | The date on which the asset content was approved by the publisher. Approval happens once when the content is officially approved for usage. | |
| 4 | Resource Effective Period | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | The period during which the resource content was or is planned to be effective. | |
| 5 | Resource Last Review Date | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | The date on which the asset content was last reviewed. Review happens periodically after that, but doesn't change the original approval date. |
| 1 | 2 | 3 | 4 | 5 | |
| Extension | C D | C D | C D | C D | C D |
| Extension.extension | C | C | C | C | C |
| Extension.url | F | F | F | F | F |
| Extension.value[x] | C | C | C | C | C |
Produced 06 Apr 2023