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B20

B20: Human immunodeficiency virus [HIV] disease

Billable / specific codeICD-10-CM

B20 is a billable, specific ICD-10-CM code for human immunodeficiency virus [hiv] disease. It is valid for submission on a claim.

Check B20 with the rest of the claim: free scrubber

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

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

Code first

The underlying condition must be sequenced before this code.

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

Use additional code

Add a secondary code to capture the detail described below.

  • code(s) to identify all manifestations of HIV infection

Includes

Conditions this code covers.

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

Other codes that can never be billed with B20

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • D61.81Pancytopenia
  • I88Nonspecific lymphadenitis
  • Z21Asymptomatic human immunodeficiency virus [HIV] infection status
  • L04Acute lymphadenitis
  • R62.5Other and unspecified lack of expected normal physiological development in childhood
  • R75Inconclusive laboratory evidence of human immunodeficiency virus [HIV]
  • D89.89Other specified disorders involving the immune mechanism, not elsewhere classified
  • B97.3Retrovirus as the cause of diseases classified elsewhere

Risk adjustment

B20 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 1 HIV/AIDS0.301 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

B20 is named in 45 Medicare coverage policies: 45 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52466Nebulizers - Policy Article
  • A52996Billing and Coding: Routine Foot Care
  • A53060Billing and Coding: Ophthalmology: Extended Ophthalmoscopy and Fundus Photography
  • A55717Billing and Coding: Lab: Flow Cytometry

Alphabetic index entries that lead here

  • AIDS(related complex)
  • ARC(AIDS-related complex)
  • HIV
  • Slim disease(in HIV infection)
  • Acquired›immunodeficiency syndrome(AIDS)
  • Disease, diseased›human immunodeficiency virus(HIV)
  • Disease, diseased›slim(HIV)
  • Human›immunodeficiency virus(HIV) disease (infection)
  • Syndrome›HIV infection, acute
  • Dementia›in›human immunodeficiency virus disease(HIV)
  • Disease, diseased›viral, virus›human immunodeficiency(HIV)
  • Encephalitis›due to›human immunodeficiency virus disease(HIV)

Code history

Unchanged in every release from FY2024 to FY2027.

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.