F51.9Billable
Sleep disorder not due to a substance or known physiological condition, unspecified
Short description: Sleep disorder not due to a sub or known physiol cond, unsp
- Chapter
- 5. Mental, Behavioral and Neurodevelopmental disorders
- Category
- F51
- Effective date
- October 1, 2026
Related codes in category F51
F51Sleep disorders not due to a substance or known physiol condF51.0Insomnia not due to a substance or known physiol conditionF51.01Primary insomniaYesF51.02Adjustment insomniaYesF51.03Paradoxical insomniaYesF51.04Psychophysiologic insomniaYesF51.05Insomnia due to other mental disorderYesF51.09Oth insomnia not due to a substance or known physiol condYesF51.1Hypersomnia not due to a substance or known physiol condF51.11Primary hypersomniaYesF51.12Insufficient sleep syndromeYesF51.13Hypersomnia due to other mental disorderYes
Frequently asked questions
What is ICD-10 code F51.9?
F51.9 is an ICD-10-CM diagnosis code for Sleep disorder not due to a substance or known physiological condition, unspecified.
Is F51.9 a billable code?
Yes. F51.9 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is F51.9 in?
F51.9 falls under Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.
When did F51.9 become effective?
F51.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to F51.9?
F51.9 belongs to category F51, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.