This value set includes codes from the following code systems:
SNOMED_CT
where constraint Equal (<<105590001 |Substance OR <<373873005 |Pharmaceutical / biologic product| OR <<716186003 |No known allergy| OR 196461000000101 |Transfer-degraded drug allergy| OR 196471000000108 |Transfer-degraded non-drug allergy)v3 Code System NullFlavor
where concept Equal NI