F51.1 Hypersomnia not due to a substance or known physiological condition

Non-billable header with 4 child codes.

Excludes2 (not included here)

• 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-)

Applies from F51 Sleep disorders not due to a substance or known physiological condition

Excludes2 (not included here)

• organic sleep disorders (G47.-)

Codes under F51.1

• F51.11 Primary hypersomnia
• F51.12 Insufficient sleep syndrome
• F51.13 Hypersomnia due to other mental disorder
• F51.19 Other hypersomnia not due to a substance or known physiological condition

Code annotations containing back-references to F51.1

Back-references to F51.1

• Type 2 Excludes: G47.1 Hypersomnia ("hypersomnia not due to a substance or known physiological condition (F51.1-)")

Back-references to F51

• Type 2 Excludes: F98 Other behavioral and emotional disorders with onset usually occurring in childhood and adolescence ("sleep disorders not due to a substance or known physiological condition (F51.-)")
• Type 2 Excludes: G47 Sleep disorders ("nonorganic sleep disorders (F51.-)")

Nearby codes

• F51.02 Adjustment insomnia
• F51.03 Paradoxical insomnia
• F51.04 Psychophysiologic insomnia
• F51.05 Insomnia due to other mental disorder
• F51.09 Other insomnia not due to a substance or known physiological condition
• F51.1 Hypersomnia not due to a substance or known physiological condition (this code)
• F51.11 Primary hypersomnia
• F51.12 Insufficient sleep syndrome
• F51.13 Hypersomnia due to other mental disorder
• F51.19 Other hypersomnia not due to a substance or known physiological condition
• F51.3 Sleepwalking [somnambulism]