ICD-10 Code G47.52 – REM Sleep Behavior Disorder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G47.52 – REM sleep behavior disorder
What it is
G47.52 identifies REM sleep behavior disorder, a parasomnia in which normal muscle paralysis during REM sleep is lost. This allows dream-enactment behaviors during sleep.
Clinical signs
Typical findings include talking, shouting, punching, kicking, or other complex movements during sleep, often with dream recall afterward. Clinical features vary; refer to documentation.
When to use this code
Use G47.52 when the provider documents REM sleep behavior disorder or confirms dream-enactment behavior linked to REM sleep. Apply it when the diagnosis is established in the chart, not just suspected from a single episode.
If the note describes abnormal sleep movements without a clear REM sleep disorder diagnosis, check documentation before coding. You may need a more specific or different sleep disorder code.
Do not use for
Do not use this code for general insomnia, nightmares alone, or nonspecific nighttime movement without evidence of REM sleep behavior disorder. Check documentation.
Coding tip
Look for provider wording that ties the behaviors to REM sleep and dream enactment; if that link is missing, verify the diagnosis before assigning G47.52.