F99 Mental disorder, not otherwise specified
ICD-10-CM category F99 sits in Chapter 5 (Mental, behavioral and neurodevelopmental disorders, F01-F99). It contains 1 billable code 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.
The category code
F99 itself is billable for FY2027: no more specific code exists under it.Billable codes in F99
| Code | Description |
|---|---|
F99 | Mental disorder, not otherwise specified |
Search within ICD-10-CM for F99 and related codes
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