ICD-10-CM category
Y99: External cause status
Codes under Y99 (External cause status). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| Y99.0 | Civilian activity done for income or pay | ✓ |
| Y99.1 | Military activity | ✓ |
| Y99.2 | Volunteer activity | ✓ |
| Y99.8 | Other external cause status | ✓ |
| Y99.9 | Unspecified external cause status | ✓ |
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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