Hypersomnia not due to a substance or known physiological condition

**Excludes2:** - alcohol related hypersomnia (F10.182, F10.282, F10.982) - drug-related hypersomnia (F11.182, F11.282, F11.982, F13.182, F13.282, F13.982, F14.182, F14.282, F14.982, F15.182, F15.282, F15.982, F19.182, F19.282, F19.982) - hypersomnia NOS (G47.10) - hypersomnia due to known physiological condition (G47.10) - idiopathic hypersomnia (G47.11, G47.12) - narcolepsy (G47.4-)