Table 1.
Outline of the Hypersomnias of Central Origin not due to a Circadian Rhythm Sleep Disorder, Sleep Related Breathing Disorder, or Other Cause of Disturbed Nocturnal Sleep20
| Narcolepsy with cataplexy |
| Narcolepsy without cataplexy |
| Narcolepsy due to medical condition |
| Narcolepsy, unspecified |
| Recurrent Hypersomnia |
| Kleine-Levin Syndrome |
| Menstrual-related Hypersomnia |
| Idiopathic Hypersomnia with Long Sleep Time |
| Idiopathic Hypersomnia without Long Sleep Time |
| Behaviorally Induced Insufficient Sleep Syndrome |
| Hypersomnia Due to Medical Condition |
| Hypersomnia Due to Drug or Substance |
| Hypersomnia Not Due to Substance or Known Physiological Condition (Nonorganic Hypersomnia, NOS) |
| Physiological (Organic) Hypersomnia, Unspecified (Organic Hypersomnia, NOS) |