Is F51.0 a billable code?
No. F51.0 is a header code that groups 6 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
F51.0: Insomnia not due to a substance or known physiological condition
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
F51.0 groups related diagnoses under insomnia not due to a substance or known physiological condition. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under F51.0
- F51.01Primary insomnia
- F51.02Adjustment insomnia
- F51.03Paradoxical insomnia
- F51.04Psychophysiologic insomnia
- F51.05Insomnia due to other mental disorder
- F51.09Other insomnia not due to a substance or known physiological condition
Other codes in F51 Sleep disorders not due to a substance or known physiological condition
- F51.1Hypersomnia not due to a substance or known physiological conditionheader
- F51.3Sleepwalking [somnambulism]
- F51.4Sleep terrors [night terrors]
- F51.5Nightmare disorder
- F51.8Other sleep disorders not due to a substance or known physiological condition
- F51.9Sleep disorder not due to a substance or known physiological condition, unspecified
F51.0 questions
What does F51.0 mean?
F51.0 is the ICD-10-CM code for Insomnia not due to a substance or known physiological condition. It is in chapter 5, Mental, behavioral and neurodevelopmental disorders (F01-F99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.