B20Human immunodeficiency virus [HIV] disease

B20 is the ICD-10-CM diagnosis code for human immunodeficiency virus [HIV] disease. It belongs to block B20 (human immunodeficiency virus [HIV] disease) and chapter 1 (certain infectious and parasitic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Don't report B20 together with the conditions in its Excludes1 note: asymptomatic human immunodeficiency virus [HIV] infection status (Z21), exposure to HIV virus (Z20.6) and inconclusive serologic evidence of HIV (R75).

Code first: Human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium, if applicable (O98.7-).

Use an additional code(s) to identify all manifestations of HIV infection.

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 969 (HIV with Extensive O.R. Procedures with MCC, relative weight 7.1775), DRG 970 (HIV with Extensive O.R. Procedures without MCC, relative weight 3.1469), DRG 974 (HIV with Major Related Condition with MCC, relative weight 3.0506), DRG 975 (HIV with Major Related Condition with CC, relative weight 1.3252), DRG 976 (HIV with Major Related Condition without CC/MCC, relative weight 0.8124) and DRG 977 (HIV with or without Other Related Condition, relative weight 1.3911), in MDC 25 (Human Immunodeficiency Virus Infections), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 042 (human immunodeficiency virus [HIV] disease).