ICD-10 Guide

Tinea

ICD-10 Coding for Tinea(B35.1, B35.3)

PRIMARY SPECIALTYPodiatry

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Tinea?

Essential facts and insights about Tinea

Key Clinical Considerations:

Itchy, scaly rash on the feet or between toes
KOH preparation showing hyphae or spores
Erythema, scaling, and possible fissuring on physical exam

Clinical Information

Clinical Criteria & Documentation Requirements

Patient history including symptoms and duration
Specific terminology such as 'tinea pedis' or 'athlete's foot'
Documentation of physical exam findings and diagnostic tests

Coding Guidelines

Usage Guidelines & Examples

Follow guidelines for appropriate use of ICD codes for fungal infections.
Common errors include misclassifying the type of tinea.

Code Exclusions

Important Exclusions

Other dermatophyte infections not affecting the feet
Alternative codes for non-fungal foot conditions

Specialty Focus

Primary Specialty

Podiatry

Specialty Applications

Adults and children with dermatophyte infections
Podiatry clinics and dermatology practices

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

Documentation requirements?

Include patient history, physical exam findings, and diagnostic test results.

Billing considerations?

Ensure accurate coding to reflect the specific type of tinea for proper reimbursement.

Tinea

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

Documentation requirements?

Billing considerations?

Tinea

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

Documentation requirements?

Billing considerations?