2026 ICD-10-CM · F99
Unspecified mental disorder
F99 is the catch-all code for mental disorder not otherwise classified. It should be used sparingly and only when more specific documentation is unavailable.
Parent codes in F99
1 parent codes
This reference is provided for billing and documentation guidance only. It is not medical advice. For clinical decision-making, consult the current CMS ICD-10-CM Official Guidelines for Coding and Reporting, and verify code applicability against the patient's documented clinical findings.
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