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ICD-10 diagnosis code

F20.3 Undifferentiated schizophrenia

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F20.3 is the ICD-10 code for Undifferentiated schizophrenia. It is a four-character subcategory of F20 (Schizophrenia), the most specific level in the WHO edition. It belongs to the block F20–F29 (Schizophrenia, schizotypal and delusional disorders) in Chapter V, Mental and behavioural disorders.

Code type
Subcategory (4 characters)
Chapter
V · F00–F99
Classification
WHO ICD-10, 2019 version

Definition

Psychotic conditions meeting the general diagnostic criteria for schizophrenia but not conforming to any of the subtypes in F20.0-F20.2, or exhibiting the features of more than one of them without a clear predominance of a particular set of diagnostic characteristics.

What F20.3 includes

Conditions and terms that are coded here.

  • Atypical schizophrenia

What F20.3 excludes

Conditions that look similar but belong under another code.

  • acute schizophrenia-like psychotic disorder F23.2
  • chronic undifferentiated schizophrenia F20.5
  • post-schizophrenic depression F20.4

F20.3 in national editions

Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.

SwedenICD-10-SE

F20.3Odifferentierad schizofreni

NorwayICD-10-NO

F20.3Udifferensiert schizofreni

  • F20.30Kronisk udifferensiert schizofreni
  • F20.31Episodisk udifferensiert schizofreni med progredierende funksjonssvikt
  • F20.32Episodisk udifferensiert schizofreni med stabil funksjonssvikt
  • F20.33Episodisk udifferensiert schizofreni med remisjon
  • F20.34Udifferensiert schizofreni med inkomplett remisjon
  • F20.35Udifferensiert schizofreni med komplett remisjon
  • F20.38Udifferensiert schizofreni med annet forløp
  • F20.39Udifferensiert schizofreni med usikkert forløp eller for kort observasjonstid (<1 år)
DenmarkICD-10-DK

DF203Udifferentieret skizofreni

  • DF2030Kontinuerlig udifferentieret skizofreni
  • DF2031Episodisk udifferentieret skizofreni med fremadskridende defekt
  • DF2032Episodisk udifferentieret skizofreni med stabil defekt
  • DF2033Episodisk remitterende udifferentieret skizofreni
  • DF2034Udifferentieret skizofreni med inkomplet remission
  • DF2035Udifferentieret skizofreni med komplet remission
  • DF2038Udifferentieret skizofreni med andet forløb
  • DF2039Udifferentieret skizofreni med ubestemt forløb
FinlandICD-10-FI

F20.3Erilaistumaton skitsofrenia

  • F20.30Erilaistumaton skitsofrenia jatkuva
  • F20.31Erilaistumaton skitsofrenia jaksottainen, mihin liittyy etenevä toimintavajaus
  • F20.32Erilaistumaton skitsofrenia jaksottainen, mihin liittyy vakaa toimintavajaus
  • F20.33Erilaistumaton skitsofrenia jaksottainen, välillä toipuminen
  • F20.34Erilaistumaton skitsofrenia epätäydellinen toipuminen
  • F20.35Erilaistumaton skitsofrenia täydellinen toipuminen
  • F20.38Erilaistumaton skitsofrenia muu
  • F20.39Erilaistumaton skitsofrenia taudinkulku epävarma, seuranta-aika liian lyhyt
GermanyICD-10-GM

F20.3Undifferenzierte Schizophrenie

FranceICD-10-FR

F20.3Schizophrénie indifférenciée

NetherlandsICD-10-NL

F20.3ongedifferentieerde schizofrenie

United StatesICD-10-CM

F20.3Undifferentiated schizophrenia

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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