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ICD-10 Guide
DiagnosesAspirin Allergy

Aspirin Allergy

ICD-10 Coding for Aspirin Allergy(Z88.6, T39.015A)

PRIMARY SPECIALTYCardiology
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Aspirin Allergy?
Essential facts and insights about Aspirin Allergy

Key Clinical Considerations:

  • History of hypersensitivity reactions to aspirin, including urticaria, angioedema, or anaphylaxis.
  • Laboratory findings may include elevated serum tryptase levels during an acute reaction.
  • Physical examination may reveal signs of an allergic reaction such as rash, swelling, or respiratory distress.
  • Imaging or procedural findings are typically not applicable for aspirin allergy diagnosis.
  • Severity criteria may include the classification of reactions as mild, moderate, or severe based on symptoms and response to treatment.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Document the patient's history of aspirin use and any previous allergic reactions.
  • Specific terminology such as 'aspirin hypersensitivity' or 'aspirin-induced asthma' must be used.
  • Examples include noting the type of reaction (e.g., anaphylaxis) and the time frame of onset after aspirin ingestion.
  • Medical necessity documentation should include the rationale for avoiding aspirin in treatment plans.
  • Quality measures may require documentation of allergy status in the patient's problem list.

Coding Guidelines

Usage Guidelines & Examples

  • Use Z88.6 for patients with a documented allergy to aspirin, especially when prescribing alternative medications.
  • Do not use this code for patients with aspirin intolerance without an allergic component.
  • Compare with T39.015A for acute aspirin poisoning, which is a different clinical scenario.
  • Common coding errors include misclassifying aspirin intolerance as an allergy; ensure clear documentation supports the diagnosis.
  • In complex cases, consider patient history and symptomatology to select the most appropriate code.

Code Exclusions

Important Exclusions

  • Exclude patients with non-allergic aspirin intolerance, which may present differently.
  • Alternative codes for excluded conditions may include Z91.19 for other specified personal history of allergies.
  • Conditions are excluded to ensure accurate representation of true allergic reactions.
  • Common exclusion mistakes include failing to differentiate between intolerance and allergy; clear documentation is essential.
  • Related but distinct conditions include NSAID allergies and other drug allergies.

Related ICD-10 Codes

Primary Codes
Z88.6
Allergy to aspirin
T39.015A
Poisoning by aspirin, initial encounter
Ancillary Codes
T39.015A
Z88.6
.
Differential Codes
Z91.12

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Cardiology

Specialty Applications

  • Applies to patients with a history of allergic reactions to aspirin.
  • Patient populations include all ages, with a focus on those with cardiovascular conditions requiring antiplatelet therapy.
  • Clinical settings include outpatient allergy clinics, cardiology practices, and emergency departments.
  • Specialty-specific applications are relevant in cardiology, particularly for patients requiring alternative antiplatelet therapy.
  • Treatment contexts include preoperative assessments and management of cardiovascular disease.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Template: 'Patient diagnosed with aspirin allergy based on history of urticaria after ingestion.'

Template 2

Template: 'Clinical presentation consistent with aspirin allergy including anaphylaxis symptoms.'

Template 3

Template: 'Diagnostic criteria met as evidenced by elevated tryptase levels during allergic reaction.'

Template 4

Template: 'Treatment plan initiated for aspirin allergy with avoidance of aspirin and alternative medications.'

Template 5

Template: 'Follow-up care for aspirin allergy including monitoring for alternative antiplatelet therapy.'

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What documentation is required for this diagnosis?

Document the patient's allergic reaction history, including symptoms and treatment responses.

How does this differ from similar diagnoses?

Aspirin allergy involves an immune response, while intolerance may not.

What are common billing considerations?

Ensure accurate coding to reflect the allergy status for reimbursement and treatment planning.

What procedures are typically associated?

Related CPT codes may include allergy testing and consultations.

Are there any quality reporting implications?

Quality measures may require documentation of allergy status in treatment plans.