ICD-10 Code G47.00 – Insomnia, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G47.00 – Insomnia, unspecified
What it is
G47.00 identifies insomnia when the record does not specify the type, cause, or duration. Use it for documented sleep difficulty without enough detail for a more specific insomnia code.
Clinical signs
Clinical features vary; refer to documentation. Typical notes may describe trouble falling asleep, staying asleep, or waking too early, with resulting daytime impairment or distress.
When to use this code
Use this code when the provider documents insomnia but does not identify a subtype such as idiopathic, due to a medical condition, or due to a substance. It also fits encounters where the chart simply states “insomnia” and no further clarification is available.
If the documentation later specifies a more exact diagnosis, you should code that instead. Check documentation for cause, chronicity, and any linked conditions before assigning G47.00.
Do not use for
Do not use G47.00 when the record supports a more specific insomnia diagnosis or when sleep complaints are better explained by another disorder. Check documentation for alternate sleep disorders or underlying causes.
Coding tip
Query for the insomnia type or cause whenever the note is vague, because specificity may change the code selection.