F51.1
Non-billableHypersomnia not due to a substance or known physiol cond
Hypersomnia not due to a substance or known physiological condition
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Includes
Conditions included under this code
- disorders of psychological development
Excludes 2
Conditions not included here, but the patient may have both
- •symptoms, signs and abnormal clinical laboratory findings, not elsewhere classifiedR00-R99
- •organic sleep disordersG47
- •alcohol related hypersomnia, ,F10.182, F10.282, F10.982
- •drug-related hypersomnia, , , , , , , , , , , , , ,F11.182, F11.282, F11.982, F13.182, F13.282, F13.982, F14.182, F14.282, F14.982, F15.182, F15.282, F15.982, F19.182, F19.282, F19.982
- •hypersomnia NOSG47.10
- •hypersomnia due to known physiological conditionG47.10
- •idiopathic hypersomnia,G47.11, G47.12
- •narcolepsyG47.4
Child Codes (4)
Related Codes(6)
F51.0Insomnia not due to a substance or known physiol condition
F51.3Sleepwalking [somnambulism]
F51.4Sleep terrors [night terrors]
F51.5Nightmare disorder
F51.8Oth sleep disord not due to a sub or known physiol cond
F51.9Sleep disorder not due to a sub or known physiol cond, unsp
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(2)
Frequently Asked Questions
What is the ICD-10 code for hypersomnia not due to a substance or known physiol cond?
The ICD-10-CM code for hypersomnia not due to a substance or known physiol cond is F51.1. The full clinical description is "Hypersomnia not due to a substance or known physiological condition". F51.1 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code F51.1 mean?
ICD-10-CM code F51.1 represents “Hypersomnia not due to a substance or known physiological condition”. It is classified under Chapter 5: Mental, Behavioral and Neurodevelopmental Disorders and is a non-billable header code. Use a more specific child code for billing purposes.
Is F51.1 a billable code?
No, F51.1 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 4 child codes under F51.1.
What chapter is F51.1 in?
F51.1 is in Chapter 5: Mental, Behavioral and Neurodevelopmental Disorders (codes F01-F99).
What are the subcategories under F51.1?
F51.1 has 4 child codes, including: F51.11 (Primary hypersomnia), F51.12 (Insufficient sleep syndrome), F51.13 (Hypersomnia due to other mental disorder), F51.19 (Oth hypersomnia not due to a substance or known physiol cond).
What are the UMLS CUIs for F51.1?
F51.1 is linked to 1 UMLS Concept Unique Identifier: C2874964. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does F51.1 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like hypersomnia not due to a substance or known physiol cond affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of F51.1?
F51.1 maps to the ICD-11 code: 7A26 (Insufficient sleep syndrome).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.