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ICD-10 Guide
DiagnosesAllergy To Codeine

Allergy To Codeine

ICD-10 Coding for Allergy to Codeine(Z88.6, T40.2X5A)

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

Diagnosis Overview

What is Allergy To Codeine?
Essential facts and insights about Allergy to Codeine

Key Clinical Considerations:

  • History of hypersensitivity reactions to codeine, including but not limited to urticaria, angioedema, or anaphylaxis.
  • Laboratory findings may include elevated serum tryptase levels during an acute allergic reaction.
  • Physical examination findings may reveal rash, respiratory distress, or gastrointestinal symptoms following codeine administration.
  • Imaging or procedural findings are generally not applicable unless complications arise from an allergic reaction.
  • Severity criteria include the degree of reaction (mild, moderate, severe) and the need for emergency intervention.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Document the patient's history of allergy to codeine, including specific reactions experienced.
  • Use precise terminology such as 'codeine allergy' or 'hypersensitivity to codeine' in the medical record.
  • Examples include: 'Patient reports a history of anaphylaxis after codeine use' or 'Patient experienced urticaria after administration of codeine.'
  • Medical necessity documentation should include the rationale for avoiding codeine in treatment plans.
  • Quality measures may require documentation of allergy status in medication reconciliation processes.

Coding Guidelines

Usage Guidelines & Examples

  • Use Z88.6 when the patient has a documented allergy to codeine, particularly in contexts where codeine is contraindicated.
  • Do NOT use this code if the patient has a history of side effects that are not allergic reactions (e.g., nausea without urticaria).
  • Compare with T40.2X5A, which is used for poisoning by codeine, indicating a different clinical scenario.
  • Common coding errors include misclassifying side effects as allergies; ensure clear documentation of allergic reactions.
  • In complex cases, consider additional codes for related conditions or complications arising from the allergy.

Code Exclusions

Important Exclusions

  • Conditions explicitly excluded include non-allergic side effects such as constipation or nausea.
  • Alternative codes for excluded conditions may include Z91.010 for other opioid allergies.
  • Exclusions are based on the need to differentiate between true allergic reactions and adverse effects.
  • Common exclusion mistakes include coding for side effects without clear documentation of an allergic reaction.
  • Related but distinct conditions include opioid intolerance or sensitivity, which do not meet the criteria for allergy.

Related ICD-10 Codes

Primary Codes
Z88.6
Allergy to codeine
T40.2X5A
Poisoning by codeine, initial encounter
Ancillary Codes
T78.2XXA
Z88.6
for severe allergic reactions like anaphylaxis.
R23.0
Differential Codes
T40.2X5A
Z88.6

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Emergency Medicine

Specialty Applications

  • This applies to patients with a documented allergy to codeine, particularly in emergency settings.
  • Patient populations include all ages, with particular attention to those with a history of allergies.
  • Clinical settings include emergency departments, outpatient clinics, and inpatient care where codeine may be prescribed.
  • Specialty-specific applications are relevant in pain management, emergency medicine, and allergy/immunology.
  • Treatment contexts include scenarios where alternative pain management strategies are required due to the allergy.

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 allergy to codeine based on reported symptoms of urticaria and respiratory distress.'

Template 2

Template: 'Clinical presentation consistent with allergy to codeine including anaphylaxis after administration.'

Template 3

Template: 'Diagnostic criteria met as evidenced by patient history and physical examination findings.'

Template 4

Template: 'Treatment plan initiated for allergy to codeine with alternative analgesics prescribed.'

Template 5

Template: 'Follow-up care for allergy to codeine including monitoring for alternative medication efficacy.'

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?

Detailed documentation of the patient's allergic reaction to codeine, including symptoms and severity.

How does this differ from similar diagnoses?

Key differentiating factors include the nature of the reaction (allergic vs. non-allergic) and the specific substance involved.

What are common billing considerations?

Reimbursement factors include ensuring accurate coding to reflect the allergy status and avoiding codeine prescriptions.

What procedures are typically associated?

Related CPT codes may include those for allergy testing or alternative pain management interventions.

Are there any quality reporting implications?

Quality measures may require documentation of allergy status in medication reconciliation and treatment planning.