B20 — Human immunodeficiency virus [HIV] disease

B20

ICD-10 Chapter 1: Infectious & Parasitic Diseases — illustrative image — Chapter 1: Infectious and parasitic diseases (A00–B99) — illustrative image

What this code means

Disease caused by the human immunodeficiency virus (HIV), which weakens the immune system over time.

Also called: hiv disease, hiv infection.

When this code is used

Used when HIV disease (HIV with related conditions) is documented.

Where it sits in ICD-10-CM

Code B20 belongs to Chapter 1: Infectious and parasitic diseases, which covers codes A00–B99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Related symptoms

Frequently asked questions

What is ICD-10-CM code B20?

B20 is the ICD-10-CM diagnosis code for “Human immunodeficiency virus [HIV] disease”. Disease caused by the human immunodeficiency virus (HIV), which weakens the immune system over time.

When is code B20 used?

Used when HIV disease (HIV with related conditions) is documented. It belongs to Chapter 1 of ICD-10-CM (Infectious and parasitic diseases).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.