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v1.0.0
ICD-10 Guide
ICD-10 CodesB18.1

B18.1

Chronic viral hepatitis B with delta-agent

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 B18.1 is a billable code used to indicate a diagnosis of chronic viral hepatitis b with delta-agent.

Key Diagnostic Point:

Chronic viral hepatitis B with delta-agent is a liver infection caused by the hepatitis B virus (HBV) in conjunction with the hepatitis D virus (HDV). This condition is characterized by the presence of both viruses, leading to a more severe form of hepatitis. The delta agent, or HDV, can only infect individuals who are already infected with HBV, making the co-infection particularly concerning. Chronic hepatitis B can lead to significant liver damage, including cirrhosis and hepatocellular carcinoma. Patients may remain asymptomatic for years, but chronic infection can result in fatigue, jaundice, and abdominal pain. Management of chronic hepatitis B with delta-agent involves regular monitoring of liver function, antiviral therapy, and lifestyle modifications to reduce liver strain. The presence of the delta agent complicates the disease course and treatment, often requiring more aggressive management strategies. Understanding the transmission routes, which include blood-to-blood contact and sexual transmission, is crucial for prevention and control measures.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Co-infection with hepatitis D complicates treatment and management.
  • Requires detailed documentation of both HBV and HDV status.
  • Potential for severe liver complications necessitates careful monitoring.
  • Differentiation from other types of hepatitis requires specific lab results.

Audit Risk Factors

  • Inadequate documentation of co-infection status.
  • Failure to document liver function tests and their results.
  • Lack of evidence for chronicity in patient records.
  • Inconsistent coding of related liver complications.

Specialty Focus

Medical Specialties

Hepatology

Documentation Requirements

Detailed history of liver disease, lab results for HBV and HDV, and treatment plans.

Common Clinical Scenarios

Management of chronic hepatitis B with delta-agent, monitoring for liver complications.

Billing Considerations

Ensure all lab results are documented to support the diagnosis and treatment plan.

Infectious Disease

Documentation Requirements

History of exposure, vaccination status, and treatment response.

Common Clinical Scenarios

Assessment of patients with acute and chronic hepatitis B and delta co-infection.

Billing Considerations

Documenting the patient's risk factors for transmission and co-infections.

Coding Guidelines

Inclusion Criteria

Use B18.1 When
  • According to ICD
  • 10 guidelines, B18
  • 1 should be used when there is a confirmed diagnosis of chronic hepatitis B with delta
  • Documentation must support the chronic nature of the disease and the presence of both HBV and HDV

Exclusion Criteria

Do NOT use B18.1 When
No specific exclusions found.

Related CPT Codes

86803CPT Code

Hepatitis B surface antigen (HBsAg) test

Clinical Scenario

Used to confirm the diagnosis of hepatitis B.

Documentation Requirements

Document the reason for testing and results.

Specialty Considerations

Hepatology specialists should ensure comprehensive testing for both HBV and HDV.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of hepatitis conditions, improving the accuracy of data collection and reimbursement processes. B18.1 provides a clear distinction for chronic hepatitis B with delta-agent, which was less defined in ICD-9.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of hepatitis conditions, improving the accuracy of data collection and reimbursement processes. B18.1 provides a clear distinction for chronic hepatitis B with delta-agent, which was less defined in ICD-9.

Reimbursement & Billing Impact

reimbursement processes. B18.1 provides a clear distinction for chronic hepatitis B with delta-agent, which was less defined in ICD-9.

Resources

Clinical References

  • •
    CDC Hepatitis B Information

Coding & Billing References

  • •
    CDC Hepatitis B Information

Frequently Asked Questions

What is the significance of the delta agent in hepatitis B?

The delta agent (HDV) complicates hepatitis B infection, leading to more severe liver disease and a higher risk of complications such as cirrhosis and liver cancer.