FHIR Release 3 (STU) CI-Build

This page is part of the FHIR Specification (v3.0.2: STU 3). The current version which supercedes this version is 5.0.0 . For a full list Continuous Integration Build of available versions, see FHIR (will be incorrect/inconsistent at times).
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Using Codes Code Systems Value Sets Concept Maps Identifier Systems

4.2.12.641 4.3.2.228 Code System CodeSystem http://hl7.org/fhir/identity-assuranceLevel

  Maturity Level : 2
Vocabulary Responsible Owner: Patient Administration icon Work Group Informative Normative Use Context : Any Country: World
This is a code system defined by the FHIR project. Summary
  • Defining URL: Narrative http://hl7.org/fhir/identity-assuranceLevel
  • XML Name:
  • IdentityAssuranceLevel JSON
  • Definition: TTL The level of confidence that this link represents the same actual person, based on NIST Authentication Levels.
OID:
Official URL : Committee: http://hl7.org/fhir/identity-assuranceLevel Work Group Version : 6.0.0-ballot3
active as of 2021-01-04 2.16.840.1.113883.4.642.1.641 (for OID based terminology systems) Computable Name : IdentityAssuranceLevel Source Resource
XML / JSON Flags : CaseSensitive, Complete. All codes ValueSet: Identity Assurance Level OID : 2.16.840.1.113883.4.642.4.657

This Code system is used in the following FHIR core-defined or referenced value sets:

4.2.12.641.1 4.3.2.228.1 Content Definition 4.2.12.641.2 IdentityAssuranceLevel

The level of confidence that this link represents the same actual person, based on NIST Authentication Levels.

4.3.2.228.2 Content

Generated Narrative: CodeSystem identity-assuranceLevel

Last updated: 2025-12-17T09:50:17.012Z

This case-sensitive code system http://hl7.org/fhir/identity-assuranceLevel defines the following codes:

Code Display Definition Copy
level1 Level 1 Little or no confidence in the asserted identity's accuracy. btn   btn
level2 Level 2 Some confidence in the asserted identity's accuracy. btn   btn
level3 Level 3 High confidence in the asserted identity's accuracy. btn   btn
level4 Level 4 Very high confidence in the asserted identity's accuracy. btn   btn

 

See the full registry of value sets code systems defined as part of FHIR.

Explanation of the columns that may appear on this page:

Level A few code lists that FHIR defines are hierarchical - each code is assigned a level. In this scheme, some codes are under other codes, and imply that the code they are under also applies See Code System for further information.
Source The source of the definition of the code (when the value set draws in codes defined elsewhere)
Code The code (used as the code in the resource instance). If the code is in italics, this indicates that the code is not selectable ('Abstract')
Display The display (used in the display element of a Coding ). If there is no display, implementers should not simply display the code, but map the concept into their application
Definition An explanation of the meaning of the concept
Comments Additional notes about how to use the code