7A26

ICD-11 MMS 2026-01

Insufficient sleep syndrome

Description

Insufficient sleep syndrome occurs when an individual persistently fails to obtain the amount of sleep required relative to their own physiological sleep requirements to maintain normal levels of alertness and wakefulness and is thus chronically sleep deprived. The curtailed sleep pattern is present most days for at least several months. The person’s ability to initiate and maintain sleep is unimpaired. Sleep time is often markedly extended on weekend nights or during holidays compared to weekday. Extension of total sleep time results in resolution of the symptoms of sleepiness.

Index terms

  • Insufficient sleep syndrome
  • Behaviourally induced hypersomnia
  • hypersomnia of nonorganic origin
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  • nonorganic origin somnolence
  • primary hypersomnia

Inclusions

  • Behaviourally induced hypersomnia

Excludes

Sibling codes

  • 7A20 – Narcolepsy
  • 7A21 – Idiopathic hypersomnia
  • 7A22 – Kleine-Levin syndrome
  • 7A23 – Hypersomnia due to a medical condition
  • 7A24 – Hypersomnia due to a medication or substance
  • 7A25 – Hypersomnia associated with a mental disorder
  • 7A2Y – Other specified hypersomnolence disorders
  • 7A2Z – Hypersomnolence disorders, unspecified

Foundation entity

Insufficient sleep syndrome – http://id.who.int/icd/entity/1980306606

Part of: 07: Sleep-wake disorders