Y99.0 vs Y99.2
Y99.0 (Civilian activity done for income or pay) compared with Y99.2 (Volunteer activity), 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. Y99.0 carries an Excludes1 note covering Y99.2: “volunteer activity (Y99.2)”
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
| Y99.0Civilian activity done for income or pay | Y99.2Volunteer activity | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | V00-Y99 — External Causes of Morbidity (V00-Y99) | V00-Y99 — External Causes of Morbidity (V00-Y99) |
| Definition | Civilian activity done for income or pay is a billable ICD-10-CM diagnosis code (Y99.0). | Volunteer activity is a billable ICD-10-CM diagnosis code (Y99.2). |
| Includes | Civilian activity done for financial or other compensation | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources