This is the ValueSet that contains codes in both AllergyIntolerance Substance/Product, Condition and Negation Codes (http://hl7.org/fhir/ValueSet/allergyintolerance-code) and Allergen Concepts (Medications, Foods, and Environmental Substances) including refutations. (http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113762.1.4.1267.43).