F99 is the ICD-10 code for Mental disorder, not otherwise specified. It is a three-character category that is not subdivided further. It belongs to the block F99–F99 (Unspecified mental disorder) in Chapter V, Mental and behavioural disorders.
- Code type
- Category (3 characters)
- Chapter
- V · F00–F99
- Classification
- WHO ICD-10, 2019 version
What F99 includes
Conditions and terms that are coded here.
- Mental illness NOS
What F99 excludes
Conditions that look similar but belong under another code.
- organic mental disorder NOS F06.9
F99 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
F99Psykisk störning ej specificerad på annat sätt
- F99.9Psykisk störning ej specificerad på annat sätt
F99Uspesifisert psykisk forstyrrelse eller lidelse
DF99Psykiske lidelser eller forstyrrelser ikke nærmere specificeret
- DF999Psykisk lidelse eller forstyrrelse UNS
F99Tarkemmin määrittämätön mielenterveyden häiriö
F99Psychische Störung ohne nähere Angabe
F99Trouble mental, sans autre indication
F99psychische stoornis, niet nader omschreven
F99Mental disorder, not otherwise specified
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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