B34 vs B97
B34 (Viral infection of unspecified site) compared with B97 (Viral agents as the cause of diseases classified elsewhere), 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. B34 carries an Excludes1 note covering B97: “viral agents as the cause of diseases classified elsewhere (B97.-)”
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
| B34Viral infection of unspecified site | B97Viral agents as the cause of diseases classified elsewhere | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) |
| Definition | Viral infection of unspecified site is a non-billable ICD-10-CM category code (B34). | Viral agents as the cause of diseases classified elsewhere is a non-billable ICD-10-CM category code (B97). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources