Diagnosis Overview

What is Aids?

Essential facts and insights about AIDS

Key Clinical Considerations:

Presence of HIV infection with certain specified conditions
Progressive systemic illness with no other identifiable cause

Clinical Information

Clinical Criteria & Documentation Requirements

Detailed documentation of HIV status
Specific documentation of AIDS-defining conditions

Coding Guidelines

Usage Guidelines & Examples

B20 is used when the patient has an illness attributable to HIV
Z21 is used when the patient is HIV positive but has no symptoms or illness attributable to HIV

Code Exclusions

Important Exclusions

Patients who are HIV negative
Patients with symptoms of AIDS but not diagnosed with HIV

Related ICD-10 Codes

Primary Codes

B20

Human immunodeficiency virus [HIV] disease

Z21

Asymptomatic human immunodeficiency virus [HIV] infection status

Ancillary Codes

B59

B20

when Pneumocystis pneumonia is present.

Differential Codes

Z21

for patients who are HIV+ but asymptomatic and without AIDS-defining conditions.

B20

for symptomatic HIV or AIDS-defining conditions.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Infectious Disease

Specialty Applications

Patients diagnosed with HIV and exhibiting symptoms of AIDS
Patients who are HIV positive but asymptomatic

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

Patient diagnosed with HIV and exhibiting symptoms of AIDS

Template 2

Patient is HIV positive but currently asymptomatic

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

Can B20 and Z21 be used together?

No, B20 and Z21 should not be used together. B20 is for symptomatic HIV infection while Z21 is for asymptomatic HIV infection.

When should this code be used?

These codes should be used when a patient has been diagnosed with HIV and is either symptomatic (B20) or asymptomatic (Z21).