B20

Billable
ChapterA00–B99
Rankcategory
Official Description

Human immunodeficiency virus [HIV] disease

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

CH1 Parent Instructions

Includes
  • diseases generally recognized as communicable or transmissible
Excludes1(Not coded here)
  • certain localized infections - see body system-related chapters
Excludes2(Not included here)
  • carrier or suspected carrier of infectious disease (Z22.-)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)
Use Additional Code
  • code to identify resistance to antimicrobial drugs (Z16.-)

Instructional Notes

Includes
  • acquired immune deficiency syndrome [AIDS]
  • AIDS-related complex [ARC]
  • HIV infection, symptomatic
Excludes1(Not coded here)
  • 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

Clinical Hierarchy

CH1Certain infectious and parasitic diseases (A00-B99)
B20Human immunodeficiency virus [HIV] disease

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to B20:

chapterCH1
Certain infectious and parasitic diseases (A00-B99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to B20. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

15 raw paths
Acquired1 unique routes
immunodeficiency syndrome (AIDS)→B20
AIDS (related complex)1 unique routes
Direct index entry→B20
ARC (AIDS-related complex)1 unique routes
Direct index entry→B20
Dementia (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety)2 unique routes
in (due to)(2 variants)
human immunodeficiency virus (HIV) disease→B20(2 variants)
with behavioral disturbance→B20
Disease, diseased3 unique routes
human immunodeficiency virus (HIV)→B20
slim (HIV)→B20
viral, virus
human immunodeficiency (HIV)→B20
Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute)1 unique routes
due to
human immunodeficiency virus (HIV) disease→B20
HIV1 unique routes
Direct index entry→B20
Human3 unique routes
immunodeficiency virus (HIV) disease (infection)→B20(3 variants)
dementia→B20(2 variants)
with behavioral disturbance→B20
Slim disease (in HIV infection)1 unique routes
Direct index entry→B20
Syndrome1 unique routes
HIV infection, acute→B20

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 969
HIV with Extensive O.R. Procedures with MCC
DRG 970
HIV with Extensive O.R. Procedures without MCC
DRG 974
HIV with Major Related Condition with MCC
DRG 975
HIV with Major Related Condition with CC
DRG 976
HIV with Major Related Condition without CC/MCC
DRG 977
HIV with or without Other Related Condition

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Human immunodeficiency virus [HIV] disease.

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