Is F51 a billable ICD-10-CM code?

No. F51 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does F51 sit in the tabular list?

Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Behavioral syndromes associated with physiological disturbances and physical factors (F50-F59).

F51

F51 — Sleep disorders not due to a substance or known physiological condition

Non-billable headerICD-10-CM

F51 is a non-billable header ICD-10-CM code for sleep disorders not due to a substance or known physiological condition. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

organic sleep disorders (G47.-)

Other codes that can never be billed with F51

These codes carry an Excludes1 note pointing at F51. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading F51 alone.

G47.5Parasomnia
Z72.821Inadequate sleep hygiene

Risk adjustment

F51 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead F51

7 child codes. Green means billable.

Questions about F51

Is F51 a billable ICD-10-CM code?: No. F51 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does F51 sit in the tabular list?: Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Behavioral syndromes associated with physiological disturbances and physical factors (F50-F59).