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Hierarchical view of the hypersensitivity pathological processes as available in SNOMED CT International Edition version 20220831.

Allergic Conditions

Allergic conditions are defined as kinds of hypersensitivity diseases, propensities, and reactions with an immunologic basis and are modeled with a pathologic process of the Allergic process (qualifier value) hierarchy. Allergic process (qualifier value) is a child of both the Hypersensitivity process (qualifier value) and Abnormal immune process (qualifier value), and thus allergic diseases and reactions, unlike their non-allergic counterparts, will classify under both Hypersensitivity condition (finding) and Disorder of immune function. 

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Diagrammatic representation in stated view of concept 419375001 |Allergic reaction caused by oil (disorder)|as in the International Edition version 20220831.

Intolerance

Intolerance (to a substance) is a propensity to an adverse reaction, which is not an allergy or a non-allergic hypersensitivity, and may be idiosyncratic and/or individually specific (as noted in FHIR® Release 4).

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