This is the ValueSet that contains codes in both AllergyIntolerance Substance/Product, Condition and Negation Codes (http://hl7.org/fhir/ValueSet/allergyintolerance-code) and Common substances for allergy and intolerance documentation including refutations (http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113762.1.4.1186.8).