ICD-10-CM · Chapter 21 · Z00-Z99
Z21 Asymptomatic human immunodeficiency virus [HIV] infection status
Includes
- HIV positive NOS
Excludes 1 (cannot be coded together)
- acquired immunodeficiency syndrome (B20)
- contact with human immunodeficiency virus [HIV] (Z20.6)
- exposure to human immunodeficiency virus [HIV] (Z20.6)
- human immunodeficiency virus [HIV] disease (B20)
- inconclusive laboratory evidence of human immunodeficiency virus [HIV] (R75)
Code First
- Human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium, if applicable (O98.7-)
This category is a complete, billable diagnosis code.
No additional specificity is required — submit Z21 directly on claims and documentation without a subcode extension.
Last reviewed: September 2026