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v1.0.0
ICD-10 Guide
DiagnosesBehcet'S Disease

Behcet'S Disease

ICD-10 Coding for Behçet's Disease(M35.2)

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

Diagnosis Overview

What is Behcet'S Disease?
Essential facts and insights about Behçet's Disease

Key Clinical Considerations:

  • Recurrent oral ulcers
  • Genital ulcers
  • Uveitis or retinal vasculitis
  • Skin lesions such as erythema nodosum
  • Positive pathergy test

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history of recurrent symptoms
  • Detailed description of lesions and their locations
  • Results of diagnostic tests such as slit-lamp examination
  • Evidence of systemic involvement

Coding Guidelines

Usage Guidelines & Examples

  • Ensure correct use of M35.2 for Behcet's disease versus other inflammatory conditions.
  • Common errors include misclassifying symptoms as separate diagnoses.

Code Exclusions

Important Exclusions

  • Other autoimmune diseases such as lupus or sarcoidosis.
  • Alternative codes for similar symptoms without a confirmed diagnosis of Behcet's disease.

Related ICD-10 Codes

Primary Codes
M35.2
Behcet's disease
Ancillary Codes
H20.8
L98.9
Differential Codes
K12.0

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Ophthalmology

Specialty Applications

  • Patients with recurrent symptoms, particularly in ophthalmology settings.
  • Clinical settings include outpatient clinics and specialty ophthalmology 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

What are the documentation requirements?

Document all clinical findings, patient history, and diagnostic test results.

What are the billing considerations?

Ensure accurate coding based on clinical documentation and follow payer guidelines.