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F51.1 Hypersomnia not due to a substance or known physiological condition
BackF51Sleep disorders not due to a substance or known physiological conditionCategory7 →F51.0Insomnia not due to a substance or known physiological conditionCategory6 →F51.01Primary insomniaCategoryF51.02Adjustment insomniaCategoryF51.03Paradoxical insomniaCategoryF51.04Psychophysiologic insomniaCategoryF51.05Insomnia due to other mental disorderCategoryF51.09Other insomnia not due to a substance or known physiological conditionCategoryF51.1Hypersomnia not due to a substance or known physiological conditionCategory4 →F51.11Primary hypersomniaCategoryF51.12Insufficient sleep syndromeCategoryF51.13Hypersomnia due to other mental disorderCategoryF51.19Other hypersomnia not due to a substance or known physiological conditionCategoryF51.3Sleepwalking [somnambulism]CategoryF51.4Sleep terrors [night terrors]CategoryF51.5Nightmare disorderCategoryF51.8Other sleep disorders not due to a substance or known physiological conditionCategoryF51.9Sleep disorder not due to a substance or known physiological condition, unspecifiedCategory
Category
F51.1
Hypersomnia not due to a substance or known physiological condition
EXCLUDES
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-)
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-)
- Chapter
- V · Mental, Behavioral and Neurodevelopmental disorders
- Section
- F50-F59
- Valid from
Source
CMS ICD-10-CM Tabular List, edition FY2026.