Z21
BillableAsymptomatic human immunodeficiency virus [HIV] infection status
Z21 is the ICD-10-CM code for Asymptomatic human immunodeficiency virus [HIV] infection status. It is a billable, specific code valid for reimbursement.
- Status
- Billable
- Chapter
- Z00-Z99
- Edition
- FY2026
Z00-Z99 Factors influencing health status and contact with health services
What this means — in plain language
MedlinePlus · NIHWhat is HIV? HIV stands for human immunodeficiency virus. HIV harms your immune system by destroying a type of white blood cell that helps your body fight infection. This puts you at risk for other infections and diseases. What is AIDS? AIDS stands for acquired immunodeficiency syndrome. It is the final stage of infection with HIV. It happens when the body's immune system is badly damaged because of the virus. Not…
Read more about HIV at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Includes
- •HIV positive NOS
Excludes1 — not coded here
Code first
- •Human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium, if applicable (O98.7-)
Frequently asked questions
- What is ICD-10 code Z21?
- Z21 is the ICD-10-CM code for "Asymptomatic human immunodeficiency virus [HIV] infection status". It falls under Z00-Z99 Factors influencing health status and contact with health services.
- Is Z21 a billable code?
- Yes — Z21 is a billable, specific ICD-10-CM code valid for reimbursement.
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
Look up another ICD-10 code or condition