F51.0
Non-billableInsomnia not due to a substance or known physiological condition
F51.0 is the ICD-10-CM code for Insomnia not due to a substance or known physiological condition. It is a non-billable category code — use a more specific child code such as F51.01 for billing.
F01-F99 Mental, Behavioral and Neurodevelopmental disorders
A condition of unsatisfactory quantity and/or quality of sleep, which persists for a considerable period of time, including difficulty falling asleep, difficulty staying asleep, or early final wakening. Insomnia is a common symptom of many mental and physical disorders, and should be classified here in addition to the basic disorder only if it dominates the clinical picture.
What this means — in plain language
MedlinePlus · NIHWhat is sleep? While you are sleeping your brain and body functions are still active. Sleep is a natural process that helps your body restore energy, supports learning and memory, and keeps you healthy. It's not just the number of hours of sleep you get that matters. The quality of your sleep is also important. During the night, your brain cycles through different stages of non-rapid eye movement (non-REM) sleep and…
Read more about Sleep Disorders at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Excludes2 — not included here
- •alcohol related insomnia (F10.182, F10.282, F10.982)
- •drug-related insomnia (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)
- •insomnia NOS (G47.0-)
- •insomnia due to known physiological condition (G47.0-)
- •organic insomnia (G47.0-)
- •sleep deprivation (Z72.820)
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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