1. Home
  2. ICD-10-CM Codes
  3. Z00–Z99
  4. Z20-Z29
  5. Asymptomatic human immunodeficiency virus infection status (Z21)

Asymptomatic human immunodeficiency virus infection status (Z21)

Instructional Notations

Inclusion Terms Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.

  • HIV positive NOS

Code First Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.

  • Human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium, if applicable O98.7

Type 1 Excludes Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • 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