Allergen Class CodeSystem Code system¶
| Canonical | ../CodeSystem/nexus-allergen-class |
|---|---|
| Status | draft · 1.26.0 |
| Content | complete |
| Source | FSH · JSON |
What kind of thing an allergen is, carried as a second coding on AllergyIntolerance.code beside
the substance's own SNOMED CT code.
This determines AllergyIntolerance.category rather than duplicating it -- each class maps onto
exactly one R4 category, and drug and class both map onto medication. That is the point of
the system: a reaction to one drug and a reaction to a whole drug class are the same R4 category
and are not the same fact, and cross-sensitivity checking needs to tell them apart.
Read it by matching Coding.system. The substance coding and the class coding share one
CodeableConcept and are in no guaranteed order.
| Code | Display | Definition |
|---|---|---|
drug |
Drug | A single medicinal substance. Maps to AllergyIntolerance.category = medication. |
class |
Drug class | A class of medicinal substances rather than one of them -- penicillins, sulfonamides. Maps to AllergyIntolerance.category = medication, the same category a single drug maps to… |
food |
Food | A food or food constituent. Maps to AllergyIntolerance.category = food. |
env |
Environmental | A non-ingested environmental substance -- pollens, latex, animal dander, venoms. Maps to AllergyIntolerance.category = environment. |
vaccine |
Vaccine | A vaccine or a vaccine constituent. Maps to AllergyIntolerance.category = biologic. |