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v1.0.0
ICD-10 Guide
DiagnosesPenicillin Allergy

Penicillin Allergy

ICD-10 Coding for Penicillin Allergy(Z88.0, T36.0X5A)

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

Diagnosis Overview

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

Key Clinical Considerations:

  • Urticaria, angioedema, or anaphylaxis after penicillin exposure
  • Skin testing for penicillin-specific IgE antibodies
  • Erythema, wheezing, or hypotension during physical examination

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history of penicillin exposure and reaction
  • Use of specific terms like 'penicillin allergy' or 'hypersensitivity'
  • Examples include detailed descriptions of allergic reactions and any testing performed

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for coding allergies to avoid miscoding
  • Common errors include misclassifying the type of allergic reaction

Code Exclusions

Important Exclusions

  • Other drug allergies, such as cephalosporin allergy
  • Alternative codes for non-allergic reactions to penicillin

Related ICD-10 Codes

Primary Codes
Z88.0
Allergy to penicillin
Ancillary Codes
T88.6XXA
Differential Codes
T36.0X5A
T36.0X5
A for active adverse reactions to penicillin.
Z88.0
Z88.0
for historical allergy without current symptoms.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Allergy and Immunology

Specialty Applications

  • All age groups, especially those with a history of antibiotic use
  • Outpatient and inpatient settings

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

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 are the documentation requirements?

Document the patient's history, specific reactions, and any testing results.

What are the billing considerations?

Ensure accurate coding to reflect the severity and type of allergy for proper reimbursement.