F51.1
Hypersomnia not due to a substance or known physiological condition
- Release
- FY 2027
- Effective
Hierarchy
Where F51.1 sits in the official hierarchy. Each level is the code it is classified under.
- F51 Parent Sleep disorders not due to a substance or known physiological condition
- F51.1 This code Hypersomnia not due to a substance or known physiological condition
Official Coding Notes
Reproduced verbatim from the FY 2027 ICD-10-CM files. Notes labelled as inherited are declared on a parent code and apply here too.
Excludes2
organic sleep disorders ( G47 .-)
Inherited from F51 — Sleep disorders not due to a substance or known physiological condition
Excludes2
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 )
Excludes2
hypersomnia NOS ( G47.10 )
Excludes2
hypersomnia due to known physiological condition ( G47.10 )
Excludes2
narcolepsy ( G47.4- )
More Specific Codes
4 codes under F51.1
Version History
How F51.1 appears in each release imported from the official files, newest first.
-
FY 2027 Effective
CurrentHypersomnia not due to a substance or known physiological condition
-
FY 2026 Effective
UnchangedHypersomnia not due to a substance or known physiological condition
Related Codes
Other codes under F51
- F51.0 Insomnia not due to a substance or known physiological condition
- F51.3 Sleepwalking [somnambulism] Billable
- F51.4 Sleep terrors [night terrors] Billable
- F51.5 Nightmare disorder Billable
- F51.8 Other sleep disorders not due to a substance or known physiological condition Billable
- F51.9 Sleep disorder not due to a substance or known physiological condition, unspecified Billable
Codes whose official notes reference F51.1
Data Source
Code information on this page is derived from the FY 2027 ICD-10-CM files published by CDC NCHS and CMS.
- Release
- FY 2027
- Effective
- Source file
- icd10cm-code-descriptions-2027.zip
Official ICD-10-CM source files (opens in a new tab)
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