ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesB20

B20

Billable

Human immunodeficiency virus [HIV] disease

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

Code Description

ICD-10 B20 is a billable code used to indicate a diagnosis of human immunodeficiency virus [hiv] disease.

Key Diagnostic Point:

B20 is the ICD-10 code used to classify Human Immunodeficiency Virus (HIV) disease, which is a chronic viral infection that progressively weakens the immune system, leading to increased susceptibility to opportunistic infections and certain cancers. HIV is transmitted through blood, sexual contact, and from mother to child during childbirth or breastfeeding. The disease can be asymptomatic for years, but as it progresses, it can lead to Acquired Immunodeficiency Syndrome (AIDS). Patients with HIV may experience a range of symptoms, including fever, fatigue, swollen lymph nodes, and weight loss. Opportunistic infections such as Pneumocystis pneumonia, tuberculosis, and candidiasis are common in individuals with advanced HIV disease. Antiretroviral therapy (ART) is the cornerstone of HIV management, aiming to suppress viral load, improve immune function, and prevent the progression to AIDS. Regular monitoring of CD4 cell counts is essential to assess immune function and guide treatment decisions. Accurate coding of HIV disease is crucial for appropriate patient management and reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of opportunistic infections associated with HIV
  • Need for ongoing monitoring of CD4 counts and viral load
  • Complexity of antiretroviral therapy regimens
  • Differentiation between HIV and AIDS

Audit Risk Factors

  • Inadequate documentation of opportunistic infections
  • Failure to update HIV status in medical records
  • Incorrect coding of AIDS-related conditions
  • Lack of supporting lab results for CD4 counts

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed history of HIV status, treatment history, and opportunistic infections.

Common Clinical Scenarios

Management of HIV-positive patients, initiation of ART, and treatment of opportunistic infections.

Billing Considerations

Ensure documentation reflects the patient's current HIV status and any complications.

Primary Care

Documentation Requirements

Routine monitoring of HIV patients, including lab results and patient symptoms.

Common Clinical Scenarios

Annual check-ups for HIV patients, management of chronic conditions alongside HIV.

Billing Considerations

Document all relevant comorbidities and treatment adherence.

Coding Guidelines

Inclusion Criteria

Use B20 When
  • According to ICD
  • 10 guidelines, B20 should be used when the patient is diagnosed with HIV disease, and it is essential to document any associated opportunistic infections or conditions
  • The code should not be used if the patient is HIV positive but asymptomatic without any complications

Exclusion Criteria

Do NOT use B20 When
No specific exclusions found.

Related CPT Codes

80061CPT Code

Lipid panel

Clinical Scenario

Used to monitor lipid levels in HIV patients on ART.

Documentation Requirements

Document the reason for lipid monitoring and any relevant patient history.

Specialty Considerations

Endocrinology may also be involved in managing metabolic side effects of ART.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of HIV-related conditions, improving the accuracy of patient records and reimbursement processes. B20 provides a clear distinction between HIV disease and asymptomatic HIV status, enhancing clinical management.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of HIV-related conditions, improving the accuracy of patient records and reimbursement processes. B20 provides a clear distinction between HIV disease and asymptomatic HIV status, enhancing clinical management.

Reimbursement & Billing Impact

reimbursement processes. B20 provides a clear distinction between HIV disease and asymptomatic HIV status, enhancing clinical management.

Resources

Clinical References

  • •
    CDC HIV Surveillance Report

Coding & Billing References

  • •
    CDC HIV Surveillance Report

Frequently Asked Questions

What is the difference between B20 and Z21?

B20 is used for patients with HIV disease who have symptoms or complications, while Z21 is for asymptomatic patients who are HIV positive but do not have any related conditions.