| # | | Name | Source | Ver | Description |
| 1 | | Anonymization Extension - IEHR | fhir.uv.researchdatasharing#current | R4 | This Extension describes the type of anonymization used in a ResearchStudy |
| 2 | | Artifact Author | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | An individiual or organization primarily involved in the creation and maintenance of the {{title}}. |
| 3 | | Body Location Qualifier Extension | hl7.fhir.us.mcode#current | R4 | Qualifier to refine an body location. These include qualifiers for relative location, directionality, number, and plane, and exclude qualifiers for laterality. |
| 4 | | CH VACD Extension Entry Cross Reference | ch.fhir.ig.ch-vacd#current | R4 | Extension to make a reference to an entry in an other document. |
| 5 | | Laterality Qualifier Extension | hl7.fhir.us.mcode#current | R4 | Qualifier to specify laterality. |
| 6 | | Procedure Intent Extension | hl7.fhir.us.mcode#current | R4 | The purpose of a treatment, medication, or procedure. |
| 7 | | ProvenanceExtension-IEHR | fhir.uv.crossborderdataexchange#current | R4 | |
| 8 | | Radiotherapy Dose Delivered To Volume Extension | hl7.fhir.us.mcode#current | R4 | Dose delivered to a given radiotherapy volume. |
| 9 | | Radiotherapy Modality And Technique Extension | hl7.fhir.us.mcode#current | R4 | Extension capturing modality and technique of a given radiotherapy procedure. The allowed combinations of modality and technique are constrained by invariants, one per modality. |
| 10 | | Radiotherapy Modality Extension | hl7.fhir.us.mcode#current | R4 | Extension capturing a modality of external beam or brachytherapy radiation procedures. |
| 11 | | Radiotherapy Number of Sessions Extension | hl7.fhir.us.mcode#current | R4 | The number of sessions in a course of radiotherapy. |
| 12 | | Radiotherapy Technique Extension | hl7.fhir.us.mcode#current | R4 | Extension capturing a technique of external beam or brachytherapy radiation procedures. |
| 13 | | Related Condition Absent Extension | hl7.fhir.us.mcode#current | R4 | A condition that is NOT present, related to the resource. |
| 14 | | Related Condition Extension | hl7.fhir.us.mcode#current | R4 | A condition that has a relationship with the resource. |
| 15 | | Treatment Termination Reason Extension (deprecated) | hl7.fhir.us.mcode#current | R4 | A code explaining the unplanned or premature termination, or normal completion, of a plan of treatment, course of medication, or research study.
This extension is deprecated since it is redundant with the statusReason field. |