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Hypersomnolence disorders

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

Hypersomnolence disorders are characterised by a complaint of daytime sleepiness that is not due to another sleep-wake disorder (e.g. disturbed nocturnal sleep, misaligned circadian rhythm, or breathing disorder). Individuals with excessive sleepiness may show irritability, concentration and attention deficits, reduced vigilance, distractibility, reduced motivation, anergia, dysphoria, fatigue, restlessness, and lack of coordination.

sections/codes in this section (7A20-7A2Z)

• Narcolepsy  (7A20)
• Idiopathic hypersomnia  (7A21)
• Kleine-Levin syndrome  (7A22)
• Hypersomnia due to a medical condition  (7A23)
• Hypersomnia due to a medication or substance  (7A24)
• Hypersomnia associated with a mental disorder  (7A25)
• Insufficient sleep syndrome  (7A26)
• Other specified hypersomnolence disorders  (7A2Y)
• Hypersomnolence disorders, unspecified  (7A2Z)

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