Hypersomnolence disorders

Definition

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.

9 subordinate codes

• 7A20Narcolepsy
• 7A21Idiopathic hypersomnia
• 7A22Kleine-Levin syndrome
• 7A23Hypersomnia due to a medical condition
• 7A24Hypersomnia due to a medication or substance
• 7A25Hypersomnia associated with a mental disorder
• 7A26Insufficient sleep syndrome
• 4B4YOther specified diseases of the immune system
• 4B4ZDiseases of the immune system, unspecified

Nearby in Sleep-wake disorders

• 7A00-7A0ZInsomnia disorders
• 7A40-7A4ZSleep-related breathing disorders
• 7A60-7A6ZCircadian rhythm sleep-wake disorders
• 7A80-7A8ZSleep-related movement disorders
• 7B00-7B0ZParasomnia disorders
• 4B4YOther specified diseases of the immune system
• 4B4ZDiseases of the immune system, unspecified