ICD-10 Code G47.09 – Other Insomnia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G47.09 – Other insomnia
What it is
G47.09 identifies insomnia that does not fit a more specific insomnia category. Use it when the record documents persistent difficulty sleeping, but the chart does not support another defined sleep disorder.
Clinical signs
Clinical features usually include trouble falling asleep, staying asleep, or waking too early, with resulting daytime impairment. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents insomnia and does not specify acute, chronic, or another more exact type. It also fits cases where the sleep complaint is clearly insomnia, but the available documentation is limited.
Choose the most specific code available if the note identifies a different insomnia subtype or an underlying cause. If the record is unclear, check documentation before assigning G47.09.
Do not use for
Do not use it when the chart supports a more specific insomnia code or when the sleep problem is secondary to another documented disorder. Do not assign it for general fatigue, poor sleep hygiene, or a nonspecific sleep complaint.
Coding tip
Confirm that the provider actually documents insomnia, not just sleep difficulty, and code the most specific sleep diagnosis supported by the note.