F51.9

ICD-10Billable

Sleep disorder not due to a sub or known physiol cond, unsp

Official ICD-10-CM descriptor (FY2026)

Sleep disorder not due to a substance or known physiological condition, unspecified

F51.9 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

Emotional sleep disorder NOS

Related codes in F51

Where this code sits

Chapter: 5. Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
Block: Behavioral syndromes associated with physiological disturbances and physical factors (F50-F59)
Parent code: F51

Krasyn AI Coder

Get code suggestions automatically as you type notes. Free for 50 analyses.

Install for Chrome — free

Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.