What is the ICD-10 code for Human immunodeficiency virus [HIV] disease?

The ICD-10-CM code for Human immunodeficiency virus [HIV] disease is B20 (fiscal year 2026). It is a billable diagnosis code.

What does ICD-10 code B20 mean?

B20 is the ICD-10-CM diagnosis code for Human immunodeficiency virus [HIV] disease. Human immunodeficiency virus [HIV] disease

Is B20 a billable ICD-10 code?

Yes, B20 is a billable ICD-10-CM code that can be used on medical claims.

What chapter is B20 in?

B20 is classified under Chapter 1: Certain infectious and parasitic diseases (A00-B99), Section B20: Human immunodeficiency virus [HIV] disease (B20).

What are the includes and excludes for B20?

Excludes1 (not coded here): asymptomatic human immunodeficiency virus [HIV] infection status (Z21); exposure to HIV virus (Z20.6); inconclusive serologic evidence of HIV (R75). Includes: acquired immune deficiency syndrome [AIDS]; AIDS-related complex [ARC]; HIV infection, symptomatic.

B20 Human immunodeficiency virus [HIV] disease

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The ICD-10-CM code for Human immunodeficiency virus [HIV] disease is B20 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter: 1: Certain infectious and parasitic diseases (A00-B99)
Section: B20: Human immunodeficiency virus [HIV] disease (B20)
Category B20: 1 code (1 billable)
FY2026 Status: Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to B20:

Slim disease (in HIV infection)
ARC (AIDS-related complex)
AIDS (related complex)
HIV
Human › immunodeficiency virus (HIV) disease (infection)
Acquired › immunodeficiency syndrome (AIDS)
Disease, diseased › human immunodeficiency virus (HIV)
Disease, diseased › slim (HIV)

Includes

acquired immune deficiency syndrome [AIDS]
AIDS-related complex [ARC]
HIV infection, symptomatic

Excludes1

Not coded here. These conditions should NOT be coded together with B20.

asymptomatic human immunodeficiency virus [HIV] infection status (Z21)
exposure to HIV virus (Z20.6)
inconclusive serologic evidence of HIV (R75)

Code First

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

Use Additional Code

code(s) to identify all manifestations of HIV infection

U.S. Hospital Utilization

An estimated 100,970 U.S. inpatient stays in 2023 included B20 among the documented diagnoses.
11,570 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Prevalence & Statistics

An estimated 1.2 million people in the United States were living with diagnosed and undiagnosed HIV at the end of 2022. (CDC National Center for HIV, Viral Hepatitis, STD, and TB Prevention (NCHHSTP) — HIV Surveillance Supplemental Report, 2024, 2022)

Official Coding Guidelines

HIV disease/AIDs/HIV-related illness: assign B20

If the term “AIDS” or “HIV disease” is documented or if the patient is treated for any HIV-related illness or is described as having any condition(s) resulting from the patient’s HIV positive status; code B20, Human immunodeficiency virus [HIV], should be assigned.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.1.a.2.a

Admitted for HIV-related condition: B20 principal

If a patient is admitted for an HIV-related condition, the principal diagnosis should be B20, Human immunodeficiency virus [HIV] disease followed by additional diagnosis codes for all reported HIV-related conditions.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.1.a.2.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026