{"caseSensitive":true,"concept":[{"code":"allergy","definition":"A propensity for hypersensitive reaction(s) to a substance.  These reactions are most typically type I hypersensitivity, plus other \"allergy-like\" reactions, including pseudoallergy.","display":"Allergy"},{"code":"intolerance","definition":"A propensity for adverse reactions to a substance that is judged to be not allergic or \"allergy-like\".  These reactions are typically (but not necessarily) non-immune.  They are to some degree idiosyncratic and/or patient-specific (i.e. are not a reaction that is expected to occur with most or all patients given similar circumstances).","display":"Intolerance"}],"contact":[{"telecom":[{"system":"url","value":"http://hl7.org/fhir"},{"system":"email","value":"fhir@lists.hl7.org"}]}],"content":"complete","date":"2021-01-05T10:01:24+11:00","description":"Identification of the underlying physiological mechanism for a Reaction Risk.","experimental":false,"extension":[{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-wg","valueCode":"pc"},{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status","valueCode":"normative"},{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm","valueInteger":3}],"id":"allergy-intolerance-type","identifier":[{"system":"urn:ietf:rfc:3986","value":"urn:oid:2.16.840.1.113883.4.642.4.132"},{"system":"urn:ietf:rfc:3986","use":"old","value":"urn:oid:2.16.840.1.113883.4.642.1.122"},{"system":"urn:ietf:rfc:3986","use":"old","value":"urn:oid:2.16.840.1.113883.4.642.2.52"}],"jurisdiction":[{"coding":[{"code":"001","display":"World","system":"http://unstats.un.org/unsd/methods/m49/m49.htm"}]}],"meta":{"lastUpdated":"2026-03-31T17:43:31.836+00:00"},"name":"AllergyIntoleranceType","publisher":"HL7 (FHIR Project)","resourceType":"CodeSystem","status":"active","text":{"div":"<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: CodeSystem allergy-intolerance-type</b></p><a name=\"allergy-intolerance-type\"> </a><a name=\"hcallergy-intolerance-type\"> </a><p>This case-sensitive code system <code>http://hl7.org/fhir/allergy-intolerance-type</code> defines the following codes:</p><table class=\"codes\"><tr><td style=\"white-space:nowrap\"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style=\"white-space:nowrap\">allergy<a name=\"allergy-intolerance-type-allergy\"> </a></td><td>Allergy</td><td>A propensity for hypersensitive reaction(s) to a substance.  These reactions are most typically type I hypersensitivity, plus other &quot;allergy-like&quot; reactions, including pseudoallergy.</td></tr><tr><td style=\"white-space:nowrap\">intolerance<a name=\"allergy-intolerance-type-intolerance\"> </a></td><td>Intolerance</td><td>A propensity for adverse reactions to a substance that is judged to be not allergic or &quot;allergy-like&quot;.  These reactions are typically (but not necessarily) non-immune.  They are to some degree idiosyncratic and/or patient-specific (i.e. are not a reaction that is expected to occur with most or all patients given similar circumstances).</td></tr></table></div>","status":"generated"},"title":"Allergy Intolerance Type","url":"http://hl7.org/fhir/allergy-intolerance-type","valueSet":"http://hl7.org/fhir/ValueSet/allergy-intolerance-type","version":"6.0.0-ballot4"}