Representing Patient Allergic Reactions Representing Patient Allergies and Intolerances; Environmental Substances Representing Patient Allergies and Intolerances; Food Substances Representing Patient Allergies and Intolerances; Medications Book traversal links for Allergies and Intolerances ‹ Section I: Vocabulary/Code Set/Terminology Standards and Implementation Specifications Up Representing Patient Allergic Reactions ›