ICD-10-CM 2027
ICD-10 code for insufficient sleep syndrome
From the official ICD-10-CM alphabetic index entry “Syndrome › insufficient sleep”. Page updated September 29, 2026.
About coding insufficient sleep syndrome
The ICD-10-CM code for insufficient sleep syndrome is F51.12 (Insufficient sleep syndrome).
Within F51.1 (hypersomnia not due to a substance or known physiological condition), F51.12 is specifically for insufficient sleep syndrome. Related codes cover primary hypersomnia (F51.11), hypersomnia due to other mental disorder (F51.13) and other hypersomnia not due to a substance or known physiological condition (F51.19).
Don't report F51.12 together with the conditions in its Excludes1 note: sleep deprivation (Z72.820).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Don't confuse with (Excludes1 for F51.12)
- sleep deprivation (Z72.820)
Common questions about insufficient sleep syndrome ICD-10 codes
What is the ICD-10 code for insufficient sleep syndrome?
- F51.12 — Insufficient sleep syndrome.
Is F51.12 billable?
- Yes. F51.12 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F51.12 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F51.12 as a principal diagnosis.
Is F51.12 a CC or MCC?
- No. F51.12 is neither a CC nor an MCC under MS-DRG v44.0.