F51.19 Other hypersomnia not due to a substance or known physiological condition
ICD-10-CM · CMS code reference
Official ICD-10-CM description: Other hypersomnia not due to a substance or known physiological condition
Coding notes
From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.
Excludes2
Not part of this code, but both can be coded when both are documented.
- 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-)
- organic sleep disorders (G47.-)
Related codes
F51.09Other insomnia not due to a substance or known physiological condition ICD-10-CMF51.11Primary hypersomnia ICD-10-CMF51.12Insufficient sleep syndrome ICD-10-CMF51.13Hypersomnia due to other mental disorder ICD-10-CMF51.3Sleepwalking [somnambulism] ICD-10-CMF51.4Sleep terrors [night terrors] ICD-10-CMF51.5Nightmare disorder ICD-10-CMF51.8Other sleep disorders not due to a substance or known physiological condition ICD-10-CM
Common questions
Is F51.19 a billable code?
Yes. F51.19 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.