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ICD-10 Guide
DiagnosesWernicke'S Encephalopathy

Wernicke'S Encephalopathy

ICD-10 Coding for Wernicke's Encephalopathy(E51.2)

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

Diagnosis Overview

What is Wernicke'S Encephalopathy?
Essential facts and insights about Wernicke's Encephalopathy

Key Clinical Considerations:

  • Ocular abnormalities (e.g., ophthalmoplegia, nystagmus)
  • Ataxia (gait disturbances)
  • Confusion or altered mental status

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history of alcohol use or malnutrition
  • Neurological examination findings
  • Evidence of thiamine deficiency

Coding Guidelines

Usage Guidelines & Examples

  • Follow ICD-10-CM guidelines for specificity in coding.
  • Common errors include misdiagnosing with other encephalopathies.

Code Exclusions

Important Exclusions

  • Other types of encephalopathy (e.g., hepatic, metabolic)
  • Alternative codes for thiamine deficiency without encephalopathy

Related ICD-10 Codes

Primary Codes
G31.2
Wernicke's encephalopathy
Ancillary Codes
F10.20
Differential Codes
G93.41
G92.8

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Neurology

Specialty Applications

  • Patients with chronic alcoholism or malnutrition
  • Emergency departments and neurology clinics

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 clinical signs, patient history, and diagnostic tests.

What are the billing considerations?

Ensure accurate coding and documentation to support medical necessity.