B20 vs I88
B20 (Human immunodeficiency virus [HIV] disease) compared with I88 (Nonspecific lymphadenitis), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. I88 carries an Excludes1 note covering B20: “human immunodeficiency virus [HIV] disease resulting in generalized lymphadenopathy (B20)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| B20Human immunodeficiency virus [HIV] disease | I88Nonspecific lymphadenitis | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | I00-I99 — Diseases of the Circulatory System (I00-I99) |
| Definition | Human immunodeficiency virus [HIV] disease is a billable ICD-10-CM diagnosis code (B20). | Nonspecific lymphadenitis is a non-billable ICD-10-CM category code (I88). |
| Includes | acquired immune deficiency syndrome [AIDS] AIDS-related complex [ARC] HIV infection, symptomatic | — |
| Use additional code | code(s) to identify all manifestations of HIV infection | — |
| Code first | Human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium, if applicable (O98.7-) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources