Patient presents with suspected shellfish allergy. Onset of symptoms occurred [timeframe] after ingestion of [specific shellfish, e.g., shrimp, crab, lobster, clams, mussels, oysters]. Symptoms reported include [list symptoms, e.g., urticaria, angioedema, pruritus, nausea, vomiting, abdominal pain, diarrhea, dyspnea, wheezing, cough, throat tightness, dizziness, lightheadedness, hypotension, anaphylaxis].  Patient denies [relevant negatives, e.g., fever, chills, headache].  Past medical history includes [relevant PMH, e.g., atopic dermatitis, asthma, other food allergies]. Family history is significant for [relevant FH, e.g., allergies, asthma, eczema]. Physical examination reveals [objective findings, e.g., erythematous rash, wheezing, swollen lipstongue, stridor]. Differential diagnosis includes food intolerance, scombroid poisoning, other food allergies. Based on the clinical presentation and history, a diagnosis of shellfish allergy is made. Diagnostic testing may include skin prick testing or serum-specific IgE antibody testing to confirm the specific shellfish allergen.  Treatment plan includes avoidance of all shellfish and shellfish-containing products. Patient education provided regarding ingredient labels, cross-contamination risks, and emergency management of allergic reactions.  Prescribed epinephrine auto-injector (e.g., EpiPen) and instructed on its proper use.  Follow-up appointment scheduled for [datetime] to reassess symptoms and management plan. ICD-10-CM code: Z91.01 (Allergy to shellfish).  SNOMED CT code: 419099005 (Allergy to shellfish).