| # | Name | Source | Ver | Description | |
| 1 | Contact address | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | The address of the contributor. | |
| 2 | Contact detail reference | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | A reference to a resource that is a more detailed representation of the contact detail information. | |
| 3 | Contact Reference | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | A reference to a Person, Group, Device, or Organization that is the contact. | |
| 4 | Contribution time | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | When the contribution was made by this contributor. | |
| 5 | Extended Contact Availability | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | The details provided in this contact may be used according to the attached availability guidelines. |
| 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 D |
Produced 06 Apr 2023