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ICD-10 diagnosis code

F51.2 Nonorganic disorder of the sleep-wake schedule

This page in Swedish

F51.2 is the ICD-10 code for Nonorganic disorder of the sleep-wake schedule. It is a four-character subcategory of F51 (Nonorganic sleep disorders), the most specific level in the WHO edition. It belongs to the block F50–F59 (Behavioural syndromes associated with physiological disturbances and physical factors) in Chapter V, Mental and behavioural disorders.

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

Definition

A lack of synchrony between the sleep-wake schedule and the desired sleep-wake schedule for the individual's environment, resulting in a complaint of either insomnia or hypersomnia.

What F51.2 includes

Conditions and terms that are coded here.

  • Psychogenic inversion of:
    • circadian rhythm
    • nyctohemeral rhythm
    • sleep rhythm

What F51.2 excludes

Conditions that look similar but belong under another code.

  • disorders of the sleep-wake schedule (organic) G47.2

F51.2 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

F51.2Icke-organisk störning i dygnsrytmen

NorwayICD-10-NO

F51.2Ikke-organisk forstyrrelse av søvn-våkenhetsrytmen

DenmarkICD-10-DK

DF512Ikke-organisk søvnrytmeforstyrrelse

  • DF5120Forstyrret søvnrytme UNS
  • DF5121Forstyrret søvnrytme på grund af tidszoneskift
  • DF5122Forstyrret søvnrytme på grund af skifteholdsarbejde
  • DF5123Forstyrret søvnrytme på grund af forsinket søvntid
FinlandICD-10-FI

F51.2Ei-elimellinen uni-valverytmin häiriö

GermanyICD-10-GM

F51.2Nichtorganische Störung des Schlaf-Wach-Rhythmus

FranceICD-10-FR

F51.2Trouble du rythme veille-sommeil non dû à une cause organique

NetherlandsICD-10-NL

F51.2niet-organische stoornis van slaap-waakritme

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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