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Home/Diagnosis/ICD-10 Coding for AIDS

ICD-10 Coding for AIDS

B20
Z21

Complete ICD-10-CM coding and documentation guide for icd-10 coding for aids includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
Acquired Immunodeficiency Syndrome
HIV Disease
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Key Information: ICD-10 Coding for AIDS

Essential facts and insights about ICD-10 Coding for AIDS

Use ICD-10 code B20 for human immunodeficiency virus [hiv] disease, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Human immunodeficiency virus [HIV] disease

Billable Code
B20
Billable

Diagnostic Criteria

clinical:
  • • Presence of AIDS-defining illness or CD4 count <200 cells/μL.
documentation:
  • • Physician documentation of symptomatic HIV or AIDS-related condition.

Applicable To

  • • AIDS
  • • HIV disease resulting in other conditions

Important Notes

  • • Once a patient has been diagnosed with AIDS, always use B20, not Z21.

Asymptomatic human immunodeficiency virus [HIV] infection status

Billable Code
Z21
Billable

Diagnostic Criteria

clinical:
  • • HIV positive status without symptoms or AIDS-defining conditions.

Applicable To

  • • HIV positive without symptoms

Important Notes

  • • Do not use Z21 if the patient has ever been diagnosed with AIDS.
Ancillary Codes

Additional codes that may be used with this diagnosis

B59

Pneumocystosis

Use with B20 when Pneumocystis pneumonia is present.

Frequently Asked Questions

What is the ICD-10 code for AIDS?

The ICD-10 code for AIDS is B20, used for symptomatic HIV/AIDS or AIDS-defining illnesses. For asymptomatic HIV+ status, use Z21.

When should Z21 be used instead of B20?

Z21 is used for asymptomatic HIV+ status without AIDS-defining conditions. B20 is for symptomatic HIV/AIDS.

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