ICD-10 Code G47.51 – Confusional arousals (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G47.51 – Confusional arousals
What it is
Confusional arousals are partial awakenings from sleep with confusion, reduced awareness, and slow response. The person may appear awake but is not fully alert.
Clinical signs
Episodes often occur during the first part of the night and may include disorientation, staring, or inappropriate behavior. Clinical features vary; refer to documentation.
When to use this code
Use G47.51 when the record documents confusional arousals as the diagnosed sleep disorder. Code it when the provider clearly identifies these episodes rather than another parasomnia or seizure-like event.
If the note describes nocturnal confusion without a confirmed diagnosis, check documentation before assigning the code. Make sure the record supports a sleep-related arousal disorder.
Do not use for
Do not use this code for general delirium, daytime confusion, or unspecified sleep disturbance. Check documentation if the event is better explained by another sleep disorder.
Coding tip
Look for explicit provider wording such as “confusional arousals” or “sleep-related confusion” before coding G47.51.