This is the ValueSet that contains codes in both 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) 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).