F51.9 – Sleep disorder not due to a substance or known physiological condition, unspecified
ICD-10-CM 2027 diagnosis code · Behavioral syndromes associated with physiological disturbances and physical factors
- Code
F51.9(claims format:F519)- Description
- Sleep disorder not due to a substance or known physiological condition, unspecified
- Short description
- Sleep disorder not due to a sub or known physiol cond, unsp
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 5. Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
- Block
- F50-F59 Behavioral syndromes associated with physiological disturbances and physical factors
- Parent codes
- F51
Notes for F51.9
- Emotional sleep disorder NOS
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
F51 – Sleep disorders not due to a substance or known physiological condition
- organic sleep disorders (G47.-)
Index terms for F51.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Drunkenness, sleep
- Sleep, drunkenness
- Disorder, sleep, emotional
- Disorder, sleep, nonorganic
- Problem, sleep disorder, child
- Disorder, psychogenic NOS, sleep
- Disturbance, sleep, nonorganic origin
- Sleep, disorder or disturbance, child
- Sleep, disturbance, nonorganic origin
- Sleep, disorder or disturbance, nonorganic origin
Related codes in F51
- 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]Billable
- F51.4 – Sleep terrors [night terrors]Billable
- F51.5 – Nightmare disorderBillable
- F51.8 – Other sleep disorders not due to a substance or known physiological conditionBillable
Frequently asked questions
What is ICD-10 code F51.9?
F51.9 is the ICD-10-CM code for sleep disorder not due to a substance or known physiological condition, unspecified, in the block F50-F59 (Behavioral syndromes associated with physiological disturbances and physical factors).
Is F51.9 a billable code?
Yes. F51.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does F51.9 belong to?
It belongs to category F51 – Sleep disorders not due to a substance or known physiological condition.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.