Unspecified mental disorder (F99) ICD-10-CM
The F99 section covers unspecified mental disorder with 1 ICD-10-CM diagnosis codes, of which 1 are billable in fiscal year 2027. The section is organized into the 1 code ranges listed below.
Code Ranges in This Section 1 ranges · 1 codes
| Code Range | Title | Codes | Billable |
|---|---|---|---|
| F99 | Mental disorder, not otherwise specified (F99) | 1 | 1 |
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the F99 Code Range
Mental disorders involve disruptions in thoughts, feelings, or behavior that cause distress or interfere with functioning.
This block contains a single category, F99, for a mental disorder that is not otherwise specified. It has no categories separating particular types of mental disorder.
Questions About This Page
How many codes are in the F99 range?
The F99 range contains 1 ICD-10-CM diagnosis codes in FY 2027. 1 of them are billable, and the rest are category headers that organize the section.
What conditions does F99 cover?
The range covers unspecified mental disorder. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
