Z21 — Asymptomatic human immunodeficiency virus [HIV] infection status
Part of Chapter 21: Factors influencing health status and contact with health services , block Persons with potential health hazards related to communicable diseases (Z20-Z29) .
Official Notes
Inclusion Terms
HIV positive NOS
Code First
Human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium, if applicable ( O98.7- )
Excludes1
acquired immunodeficiency syndrome ( B20 )
Excludes1
contact with human immunodeficiency virus [HIV] ( Z20.6 )
Excludes1
exposure to human immunodeficiency virus [HIV] ( Z20.6 )
Excludes1
human immunodeficiency virus [HIV] disease ( B20 )
Excludes1
inconclusive laboratory evidence of human immunodeficiency virus [HIV] ( R75 )
Child Codes
Z21 has no child codes in the FY 2027 release -- it is used on its own.
Referenced By
Official notes on these codes cite Z21.
- B20 Human immunodeficiency virus [HIV] disease Billable
- O98.7 Human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium
- R75 Inconclusive laboratory evidence of human immunodeficiency virus [HIV] Billable
- Z20.6 Contact with and (suspected) exposure to human immunodeficiency virus [HIV] Billable
- Z78 Other specified health status
FY 2027 effective October 1, 2026 · CDC NCHS and CMS