All ICD10 Codes

F51

Non-Billable
ChapterF01–F99
Rankcategory
Official Description

Sleep disorders not due to a substance or known physiological condition

Use a more specific code (5 billable, 2 non-billable)
F51.0Insomnia not due to a substance or known physiological conditionhas subcodesF51.1Hypersomnia not due to a substance or known physiological conditionhas subcodesF51.3Sleepwalking [somnambulism]F51.4Sleep terrors [night terrors]F51.5Nightmare disorderF51.8Other sleep disorders not due to a substance or known physiological conditionF51.9Sleep disorder not due to a substance or known physiological condition, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 5: Mental, Behavioral and Neurodevelopmental Disorders (F01-F99).

CH5 Parent Instructions

Includes
  • disorders of psychological development
Excludes2(Not included here. Code separately if applicable.)
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Instructional Notes

Excludes2(Not included here. Code separately if applicable.)
  • organic sleep disorders (G47.-)

Clinical Hierarchy

BillableHas subcodes
CH5Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
F50-F59Behavioral syndromes associated with physiological disturbances and physical factors (F50-F59)
F51Sleep disorders not due to a substance or known physiological conditionNot billable
F51.0Insomnia not due to a substance or known physiological conditionSubcodes
F51.1Hypersomnia not due to a substance or known physiological conditionSubcodes
F51.3Sleepwalking [somnambulism]Billable
F51.4Sleep terrors [night terrors]Billable
F51.5Nightmare disorderBillable
F51.8Other sleep disorders not due to a substance or known physiological conditionBillable
F51.9Sleep disorder not due to a substance or known physiological condition, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to F51:

chapterCH5
Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Sleep disorders not due to a substance or known physiological condition.

Search PCS Codes