ICD-10-CM · Chapter 20 · V00-Y99
Y99 External cause status
Notes
- A single code from category Y99 should be used in conjunction with the external cause code(s) assigned to a record to indicate the status of the person at the time the event occurred.
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| Y99..0 | Civilian activity done for income or pay | Yes |
| Y99..1 | Military activity | Yes |
| Y99..2 | Volunteer activity | Yes |
| Y99..8 | Other external cause status | Yes |
| Y99..9 | Unspecified external cause status | Yes |
Last reviewed: September 2026