This page is part of the FHIR Specification v4.3.0-snapshot1: R4B Snapshot to support the Jan 2022 Connectathon. About the R4B version of FHIR. The current officially released version is 4.3.0. For a full list of available versions, see the Directory of published versions . Page versions: R4B R4 R3 R2

• Using Codes
• Code Systems
• Value Sets
• Concept Maps
• Identifier Systems

4.3.7 Using Unique Ingredient Identifier (UNII) with FHIR

Vocabulary Work Group

Maturity Level: 3

Standards Status: Trial Use

4.3.7.1 Summary

Source	FDA Substance Registration System
System	The URI to identify UNII codes is http://fdasis.nlm.nih.gov
Version	If it is desired to exchange the version, use the date of the file in the UNII list download in the format YYYYMMDD
Code	Use the value of the UNII column in the UNII List
Display	Use the value of the PT (Preferred Term) column in the UNII List
Inactive	Todo: Describe how it is determined which concepts are inactive
Subsumption	No Subsumption relationships are defined by UNII
Filter Properties	None are described yet

4.3.7.2 Version Issues

To be investigated

4.3.7.3 Copyright/License Issues

UNII has no copyright acknowledgement needed, nor are there any license terms to adhere to.

4.3.7.4 NDF-RT Filter Properties

No need for filters identified yet.

4.3.7.5 Implicit Value Sets

No need for implicit value sets identified yet.