F51 ICD-10-CM Code: Sleep disorders not due to a substance or known physiological condition
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
F51Sleep disorders not due to a substance or known physiological condition
ICD-10-CM diagnosis code · United States clinical modification
Where F51 sits
- 1
Chapter 5
Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
- 2
Section
Behavioral syndromes associated with physiological disturbances and physical factors (F50-F59)
- 3
Category F51
Sleep disorders not due to a substance or known physiological condition
- 4
Code F51
Sleep disorders not due to a substance or known physiological condition
Codes under F51
F51 is a non-billable category. Choose the child code that best matches the documented diagnosis.
F51.0Insomnia not due to a substance or known physiological conditionF51.1Hypersomnia not due to a substance or known physiological conditionF51.3Sleepwalking [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, unspecifiedNotes for this code
Inclusion terms
No inclusion terms are listed for F51.
Code first
No “code first” instruction is listed for F51.
Use additional code
No “use additional code” instruction is listed for F51.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for F51.
Excludes2
Conditions not included here that may be reported separately when present.
- organic sleep disorders (G47.-)
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code F51 mean?
F51 is the FY 2027 U.S. ICD-10-CM code for “Sleep disorders not due to a substance or known physiological condition.”
Is F51 a billable or specific ICD-10-CM code?
No. F51 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is F51 located in ICD-10-CM?
F51 is listed in Chapter 5, Mental, Behavioral and Neurodevelopmental disorders (F01-F99), within Behavioral syndromes associated with physiological disturbances and physical factors (F50-F59) (F50–F59), under category F51, Sleep disorders not due to a substance or known physiological condition.
What coding notes are listed for F51?
No inclusion terms are listed for F51 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. Excludes2 notes: organic sleep disorders (G47.-).