F51.11
✓ Billable
Primary hypersomnia
ICD-10-CM · FY2026 · Mental, Behavioral and Neurodevelopmental Disorders
Code
F51.11
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Mental, Behavioral and Neurodevelopmental Disorders
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code F51.11?
ICD-10-CM code F51.11 represents Primary hypersomnia. It is a billable diagnosis code in the Mental, Behavioral and Neurodevelopmental Disorders chapter, effective October 1, 2025 – September 30, 2026.
Is F51.11 billable?
Yes. F51.11 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is F51.11 in?
F51.11 belongs to the Mental, Behavioral and Neurodevelopmental Disorders chapter (F01–F99) of ICD-10-CM.
Related codes in the F51 category
F51
Sleep disorders not due to a substance or known physiological condition
Non-billable
F51.0
Insomnia not due to a substance or known physiological condition
Non-billable
F51.1
Hypersomnia not due to a substance or known physiological condition
Non-billable
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
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