Shellfish Allergy
Find comprehensive information on shellfish allergy diagnosis, including clinical documentation, ICD-10 codes (Z91.01, T78.0XXA), SNOMED CT concepts, and differential diagnosis. Learn about shellfish allergy symptoms, testing (skin prick, IgE blood test), and management strategies. This resource offers guidance for healthcare professionals on accurate medical coding and best practices for documenting shellfish allergy in patient records. Explore resources for allergy testing interpretation and anaphylaxis management related to shellfish allergies.
Immune system reaction to proteins in shellfish (crustaceans and mollusks).
Hives, itching, swelling, vomiting, diarrhea, abdominal pain, difficulty breathing, anaphylaxis.
Restaurants, seafood markets, home kitchens, coastal regions.
ICD-10 Code Families
Complete code families applicable to Z91.013
When to use each related code
| Description | When to use |
|---|---|
| Shellfish allergy | Allergic reaction after shellfish ingestion. Symptoms vary. Code confirmed IgE-mediated reaction or consistent history/oral challenge. |
| Fish allergy | Allergic reaction after finned fish ingestion. IgE or consistent history. Differentiate from shellfish allergy. |
| Food allergy NOS | Suspected food-induced allergic reaction but allergen unknown. Use when specific allergy cannot be confirmed. |
Best-practice checklist
- ✓Shellfish allergy diagnosis: IgE test or skin prick test documented
- ✓Specific shellfish allergen identified (e.g., shrimp, crab, lobster)
- ✓Reaction details: Onset, symptoms, severity (mild, moderate, severe)
- ✓Treatment provided and patient response documented clearly
- ✓ICD-10-CM code Z91.01 (Allergy to shellfish) assigned
Common pitfalls to avoid
Coding shellfish allergy without specifying the type (e.g., shrimp, crab) leads to inaccurate data and potential underreporting for specific allergens.
Miscoding shellfish intolerance as allergy can skew prevalence data and affect treatment decisions. Proper documentation is crucial for accurate coding.
Insufficient clinical documentation to support shellfish allergy diagnosis poses audit risks and may lead to claim denials. Detailed history and test results are essential.
Best-practice tips
- 01Document shellfish specific IgE levels for ICD-10-CM Z91.010
- 02Confirm allergy via oral food challenge, if skin test is equivocal
- 03Detailed clinical history crucial for SNOMED CT 64305001 diagnosis
- 04Standardize documentation to improve CDI for shellfish allergy
- 05Educate patients on allergen avoidance and anaphylaxis management
Step-by-step checklist
- 1
1. IgE/skin-prick test: shellfish allergens (ICD-10 Z88.0)
- 2
2. Document specific shellfish causing reaction (SNOMED CT 419098007)
- 3
3. Evaluate history: symptoms post-ingestion (anaphylaxis, urticaria)
- 4
4. Consider oral food challenge if tests negative but history strong
- 5
5. Patient education: allergen avoidance, epinephrine autoinjector
Ready-to-paste narrative
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).
Clinical accuracy: This information is provided for documentation and coding guidance and should not replace professional medical judgment.
Coding standard: ICD-10-CM, current FY guidelines.