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ICD-10 Coding for Shellfish Allergy(Z91.013, T78.02XA)

Complete ICD-10-CM coding and documentation guide for Shellfish Allergy. Includes clinical validation requirements, documentation requirements, and coding pitfalls.

Also known as:

Seafood AllergyCrustacean AllergyMollusk Allergy

Related ICD-10 Code Ranges

Complete code families applicable to Shellfish Allergy

Z91.01-Z91.02Primary Range

Personal history of allergy to food, other

This range includes codes for documenting a patient's history of allergy to shellfish.

Anaphylactic reaction due to food

This range includes codes for acute anaphylactic reactions due to shellfish ingestion.

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

CodeDescriptionWhen to UseKey Documentation
Z91.013Allergy to seafoodUse when documenting a patient's known allergy to shellfish without an active reaction.
  • Documented history of allergic reaction to shellfish
  • Positive skin prick test or specific IgE test
T78.02XAAnaphylactic reaction due to shellfishUse for documenting an active anaphylactic reaction to shellfish.
  • Acute symptoms such as wheezing, angioedema, or hypotension following shellfish ingestion
  • Confirmed shellfish ingestion prior to reaction

Clinical Decision Support

Always review the patient's clinical documentation thoroughly. When in doubt, choose the more specific code and ensure documentation supports it.

Key Information: ICD-10 code for shellfish allergy

Essential facts and insights about Shellfish Allergy

The ICD-10 code for shellfish allergy is Z91.013 for history and T78.02XA for anaphylactic reactions.

Primary ICD-10-CM Codes for shellfish allergy

Allergy to seafood
Billable Code

Decision Criteria

clinical Criteria

  • Patient has a documented history of shellfish allergy.

Applicable To

  • Crustacean allergy
  • Mollusk allergy

Excludes

  • Anaphylactic reaction due to shellfish (T78.02XA)

Clinical Validation Requirements

  • Documented history of allergic reaction to shellfish
  • Positive skin prick test or specific IgE test

Code-Specific Risks

  • Incorrectly coding mollusk allergy under crustacean-specific codes

Coding Notes

  • Ensure documentation specifies the type of shellfish and the diagnostic method used.

Differential Codes

Alternative codes to consider when ruling out similar conditions to the primary diagnosis.

Anaphylactic reaction due to shellfish

T78.02XA
Use T78.02XA for active anaphylactic reactions, not for history of allergy.

Anaphylactic reaction due to other food

T78.09XA
Use T78.09XA for mollusk-related anaphylactic reactions.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Shellfish Allergy to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code Z91.013.

Impact

Clinical: May lead to inappropriate management recommendations., Regulatory: Non-compliance with coding guidelines., Financial: Potential for denied claims due to lack of specificity.

Mitigation Strategy

Always document the specific type of shellfish., Use templates that prompt for detailed information.

Impact

Reimbursement: Incorrect coding can lead to improper DRG assignment., Compliance: May result in compliance issues with coding standards., Data Quality: Affects the accuracy of patient records and data analytics.

Mitigation Strategy

Ensure documentation specifies the type of shellfish to use the correct code.

Impact

Lack of specificity in documenting the type of shellfish can lead to audit issues.

Mitigation Strategy

Use detailed templates and ensure all relevant information is captured.

Documentation errors, coding pitfalls, and audit risks are interconnected aspects of medical coding and billing. Addressing all three areas helps ensure accurate coding, optimal reimbursement, and regulatory compliance.

Frequently Asked Questions

Common questions about ICD-10 coding for Shellfish Allergy, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Shellfish Allergy

Use these documentation templates to ensure complete and accurate documentation for Shellfish Allergy. These templates include all required elements for proper coding and billing.

Allergy Clinic Visit

Specialty: Allergy and Immunology

Required Elements

  • Patient history of shellfish allergy
  • Type of shellfish (crustacean or mollusk)
  • Diagnostic tests performed
  • Reaction details and management plan

Example Documentation

Patient presents with a history of shrimp allergy. Skin prick test shows a 5mm wheal. Prescribed epinephrine autoinjector and advised to avoid crustaceans.

Examples: Poor vs. Good Documentation

Poor Documentation Example
Allergy to shellfish - avoid.
Good Documentation Example
IgE-mediated allergy to crustaceans (shrimp) confirmed by skin prick test (5mm wheal). Prescribed epinephrine autoinjector.
Explanation
The good example specifies the type of shellfish, diagnostic method, and management plan.

Need help with ICD-10 coding for Shellfish Allergy? Ask your questions below.

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