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ICD-10 Guide
DiagnosesAcute Hepatic Encephalopathy

Acute Hepatic Encephalopathy

ICD-10 Coding for Acute Hepatic Encephalopathy(K76.82, K72.00)

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

Diagnosis Overview

What is Acute Hepatic Encephalopathy?
Essential facts and insights about Acute Hepatic Encephalopathy

Key Clinical Considerations:

  • Altered mental status ranging from confusion to coma
  • Elevated ammonia levels in the blood (hyperammonemia)
  • Presence of liver disease or dysfunction, such as cirrhosis or acute liver failure
  • Neurological examination revealing asterixis or other motor disturbances
  • Severity can be staged using the West Haven criteria, ranging from minimal hepatic encephalopathy to overt hepatic encephalopathy

Clinical Information

Clinical Criteria & Documentation Requirements

  • Document the patient's mental status changes and neurological findings
  • Use specific terms like 'hepatic encephalopathy' and 'hyperammonemia' in the medical record
  • Examples include: 'Patient exhibits confusion and disorientation consistent with hepatic encephalopathy'
  • Document medical necessity for hospitalization or treatment interventions
  • Include quality measures such as monitoring ammonia levels and neurological assessments

Coding Guidelines

Usage Guidelines & Examples

  • Use K76.82 for acute hepatic encephalopathy due to liver failure; K72.00 for hepatic encephalopathy due to chronic liver disease
  • Do not use K76.82 if the encephalopathy is due to non-hepatic causes, such as metabolic disorders
  • K72.01 (acute hepatic failure with coma) may be used in cases of severe liver failure with altered consciousness
  • Common errors include misclassifying chronic hepatic encephalopathy as acute; ensure clinical context is clear
  • In complex cases, consider the underlying liver condition and associated symptoms for accurate code selection

Code Exclusions

Important Exclusions

  • Do not code K76.82 for encephalopathy due to renal failure or other non-hepatic causes
  • Use appropriate codes for metabolic or toxic encephalopathies instead
  • Conditions are excluded to ensure accurate representation of hepatic-related encephalopathy
  • Avoid confusion with chronic hepatic encephalopathy codes; ensure acute vs. chronic is clear
  • Related conditions such as hepatic coma should be coded separately if applicable

Related ICD-10 Codes

Primary Codes
K76.82
Acute hepatic encephalopathy
K72.00
Hepatic encephalopathy due to chronic liver disease
Ancillary Codes
K74.60
F10.129
Differential Codes
G92.8
K76.82
K76.82
when there is no liver failure.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Gastroenterology

Specialty Applications

  • Patients with liver cirrhosis, acute liver failure, or severe liver dysfunction
  • Common in adults, particularly those with a history of alcohol abuse or viral hepatitis
  • Clinical settings include inpatient care, especially in intensive care units
  • Gastroenterology specialty is primarily involved in diagnosis and management
  • Treatment contexts include acute management of hepatic encephalopathy and long-term care strategies

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 acute hepatic encephalopathy based on elevated ammonia levels and altered mental status.'

Template 2

Template: 'Clinical presentation consistent with hepatic encephalopathy including confusion and asterixis.'

Template 3

Template: 'Diagnostic criteria met as evidenced by ammonia levels > 50 µg/dL and neurological examination findings.'

Template 4

Template: 'Treatment plan initiated for acute hepatic encephalopathy with lactulose and monitoring of ammonia levels.'

Template 5

Template: 'Follow-up care for hepatic encephalopathy including regular assessments of mental status and liver function.'

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 mental status changes, ammonia levels, and liver function tests.

How does this differ from similar diagnoses?

Acute hepatic encephalopathy is characterized by rapid onset and is directly related to liver dysfunction, unlike chronic forms.

What are common billing considerations?

Ensure documentation supports the diagnosis and reflects the severity for appropriate reimbursement.

What procedures are typically associated?

Commonly associated procedures include ammonia level testing and neurological assessments.

Are there any quality reporting implications?

Quality measures may include monitoring ammonia levels and assessing cognitive function regularly.