Coding and coverage · ICD-10-CM

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

Not billable (header)Chapter 5

Report one of the more specific codes below.

Check coverage with this diagnosis

Codes under this one

  • F51.0 Insomnia not due to a substance or known physiological conditionHeader
  • F51.1 Hypersomnia not due to a substance or known physiological conditionHeader
  • F51.3 Sleepwalking [somnambulism]
  • F51.4 Sleep terrors [night terrors]
  • F51.5 Nightmare disorder
  • F51.8 Other sleep disorders not due to a substance or known physiological condition
  • F51.9 Sleep disorder not due to a substance or known physiological condition, unspecified

Instructional notes

Chapter 5

Excludes2Not included here: the patient may have both; report both when both are present.
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
Includes
  • disorders of psychological development

This code

Excludes2Not included here: the patient may have both; report both when both are present.
  • organic sleep disorders (G47.-)

Chapter 5: Mental, Behavioral and Neurodevelopmental disorders · F50-F59 Behavioral syndromes associated with physiological disturbances and physical factors (F50-F59)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.