Primary hypersomnia
Billable / specific
F51.11 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.
Inclusion terms
Includes (from F51)
- disorders of psychological development
Excludes2
Not included here — may be reported together when both conditions exist.
- alcohol related hypersomnia (F10.182, F10.282, F10.982) (from F51.1)
- 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) (from F51.1)
- hypersomnia NOS (G47.10) (from F51.1)
- hypersomnia due to known physiological condition (G47.10) (from F51.1)
- idiopathic hypersomnia (G47.11, G47.12) (from F51.1)
- narcolepsy (G47.4-) (from F51.1)
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99) (from F51)
- organic sleep disorders (G47.-) (from F51)
Also known as
- Hypersomnia, nonorganic origin
- Hypersomnia, not due to a substance or known physiological condition
- Hypersomnia, primary
- Somnolence, nonorganic origin
Parent code
- F51.1Hypersomnia not due to a substance or known physiological conditionHeader