Narcolepsy

Definition

Narcolepsy is a disorder characterised by daily periods of irrepressible need to sleep or daytime lapses into sleep occurring for at least several months, accompanied by abnormal manifestations of REM sleep. Multiple sleep latency testing (MSLT) demonstrates a mean sleep latency of <8 minutes and two or more sleep-onset REM periods (SOREMP’s), or one or more SOREMP’s on MSLT and a SOREMP on the preceding overnight polysomnography (PSG). Nighttime sleep is often disturbed, and brief daytime naps are typically refreshing.

3 subordinate codes

• 7A20.0Narcolepsy, Type 1
• 7A20.1Narcolepsy, Type 2
• 4B4ZDiseases of the immune system, unspecified

Nearby in Hypersomnolence disorders

• 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