Z21 Asymptomatic human immunodeficiency virus [HIV] infection status

Billable ICD-10-CM code, FY2026.

Applicable to

Excludes1 (never code together)

Code first

Applies from Z21 Asymptomatic human immunodeficiency virus [HIV] infection status

Applicable to

Excludes1 (never code together)

Code first

Risk adjustment (HCC)

MS-DRG index

Defines the logic of DRG(s) 865-866 in MDC 18.

Approximate ICD-9-CM (GEMs)

Medicare Code Edits (MCE v43.1 (April 2026))

Code annotations containing back-references to Z21

Back-references to Z21

Back-references to Z21

Diagnosis Index entries for Z21

Nearby codes