Interoperable Digital Identity and Patient Matching, published by HL7 International / Patient Administration. This guide is not an authorized publication; it is the continuous build for version 3.0.0-current built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-identity-matching-ig/ and changes regularly. See the Directory of published versions

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: FAST Identity Assurance Level Code System

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{
  "resourceType" : "CodeSystem",
  "id" : "fast-identity-assurance-level",
  "language" : "en",
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: CodeSystem fast-identity-assurance-level</b></p><a name=\"fast-identity-assurance-level\"> </a><a name=\"hcfast-identity-assurance-level\"> </a><p>This case-sensitive code system <code>http://hl7.org/fhir/us/identity-matching/CodeSystem/fast-identity-assurance-level</code> defines the following codes:</p><table class=\"codes\"><tr><td style=\"white-space:nowrap\"><b>Code</b></td><td><b>Display</b></td></tr><tr><td style=\"white-space:nowrap\">IAL1<a name=\"fast-identity-assurance-level-IAL1\"> </a></td><td>Identity Assurance Level 1</td></tr><tr><td style=\"white-space:nowrap\">IAL2<a name=\"fast-identity-assurance-level-IAL2\"> </a></td><td>Identity Assurance Level 2</td></tr><tr><td style=\"white-space:nowrap\">IAL3<a name=\"fast-identity-assurance-level-IAL3\"> </a></td><td>Identity Assurance Level 3</td></tr><tr><td style=\"white-space:nowrap\">AAL1<a name=\"fast-identity-assurance-level-AAL1\"> </a></td><td>Authenticator Assurance Level 1</td></tr><tr><td style=\"white-space:nowrap\">AAL2<a name=\"fast-identity-assurance-level-AAL2\"> </a></td><td>Authenticator Assurance Level 2</td></tr><tr><td style=\"white-space:nowrap\">AAL3<a name=\"fast-identity-assurance-level-AAL3\"> </a></td><td>Authenticator Assurance Level 3</td></tr><tr><td style=\"white-space:nowrap\">FAL1<a name=\"fast-identity-assurance-level-FAL1\"> </a></td><td>Federation Assurance Level 1</td></tr><tr><td style=\"white-space:nowrap\">FAL2<a name=\"fast-identity-assurance-level-FAL2\"> </a></td><td>Federation Assurance Level 2</td></tr><tr><td style=\"white-space:nowrap\">FAL3<a name=\"fast-identity-assurance-level-FAL3\"> </a></td><td>Federation Assurance Level 3</td></tr></table></div>"
  },
  "extension" : [
    {
      "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode" : "pa"
    },
    {
      "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
      "valueCode" : "informative",
      "_valueCode" : {
        "extension" : [
          {
            "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
            "valueCanonical" : "http://hl7.org/fhir/us/identity-matching/ImplementationGuide/hl7.fhir.us.identity-matching"
          }
        ]
      }
    }
  ],
  "url" : "http://hl7.org/fhir/us/identity-matching/CodeSystem/fast-identity-assurance-level",
  "identifier" : [
    {
      "system" : "urn:ietf:rfc:3986",
      "value" : "urn:oid:2.16.840.1.113883.4.642.40.81.16.2"
    }
  ],
  "version" : "3.0.0-current",
  "name" : "FASTAssuranceLevelCS",
  "title" : "FAST Identity Assurance Level Code System",
  "status" : "active",
  "experimental" : true,
  "date" : "2026-08-20T16:01:25+00:00",
  "publisher" : "HL7 International / Patient Administration",
  "contact" : [
    {
      "name" : "HL7 International / Patient Administration",
      "telecom" : [
        {
          "system" : "url",
          "value" : "http://www.hl7.org/Special/committees/pafm"
        }
      ]
    }
  ],
  "description" : "NIST SP 800-63-3 assurance levels used to qualify a CSP-issued identity.",
  "jurisdiction" : [
    {
      "coding" : [
        {
          "system" : "urn:iso:std:iso:3166",
          "code" : "US"
        }
      ]
    }
  ],
  "caseSensitive" : true,
  "content" : "complete",
  "count" : 9,
  "concept" : [
    {
      "code" : "IAL1",
      "display" : "Identity Assurance Level 1"
    },
    {
      "code" : "IAL2",
      "display" : "Identity Assurance Level 2"
    },
    {
      "code" : "IAL3",
      "display" : "Identity Assurance Level 3"
    },
    {
      "code" : "AAL1",
      "display" : "Authenticator Assurance Level 1"
    },
    {
      "code" : "AAL2",
      "display" : "Authenticator Assurance Level 2"
    },
    {
      "code" : "AAL3",
      "display" : "Authenticator Assurance Level 3"
    },
    {
      "code" : "FAL1",
      "display" : "Federation Assurance Level 1"
    },
    {
      "code" : "FAL2",
      "display" : "Federation Assurance Level 2"
    },
    {
      "code" : "FAL3",
      "display" : "Federation Assurance Level 3"
    }
  ]
}