Y99 External cause status
ICD-10-CM category Y99 sits in Chapter 20 (External causes of morbidity, V00-Y99). It contains 5 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.
Billable codes in Y99
| Code | Description |
|---|---|
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 |
Search within ICD-10-CM for Y99 and related codes
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