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ICD-10 diagnosis code

G47.1 Disorders of excessive somnolence [hypersomnias]

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G47.1 is the ICD-10 code for Disorders of excessive somnolence [hypersomnias]. It is a four-character subcategory of G47 (Sleep disorders), the most specific level in the WHO edition. It belongs to the block G40–G47 (Episodic and paroxysmal disorders) in Chapter VI, Diseases of the nervous system.

Code type
Subcategory (4 characters)
Chapter
VI · G00–G99
Classification
WHO ICD-10, 2019 version

G47.1 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

G47.1Hypersomni (överdriven sömnighet)

  • G47.1AIdiopatisk hypersomni med lång sömntid
  • G47.1BIdiopatisk hypersomni med kort sömntid
  • G47.1WAnnan specificerad hypersomni (inklusive sekundär hypersomni)
  • G47.1XHypersomni, ospecificerad
NorwayICD-10-NO

G47.1Eksessiv somnolens

DenmarkICD-10-DK

DG471Hypersomni

  • DG4710Organisk hypersomni UNS
  • DG4711Periodisk hypersomni
  • DG4712Idiopatisk hypersomni med lang søvntid
  • DG4713Idiopatisk hypersomni uden lang søvntid
  • DG4714Hypersomni betinget af lægemiddel eller andet aktivt stof
  • DG4715Hypersomni betinget af sygdom klassificeret andetsteds
FinlandICD-10-FI

G47.1Liikaunisuutta aiheuttava häiriö

GermanyICD-10-GM

G47.1Krankhaft gesteigertes Schlafbedürfnis

FranceICD-10-FR

G47.1Troubles du sommeil par somnolence excessive [hypersomnies]

NetherlandsICD-10-NL

G47.1stoornissen met bovenmatige slaperigheid [hypersomnia]

United StatesICD-10-CM

Listed through more specific codes:

  • G47.10Hypersomnia, unspecified
  • G47.11Idiopathic hypersomnia with long sleep time
  • G47.12Idiopathic hypersomnia without long sleep time
  • G47.13Recurrent hypersomnia
  • G47.14Hypersomnia due to medical condition
  • G47.19Other hypersomnia

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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