ICD-10 Code G47.59 – Other parasomnia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G47.59 – Other parasomnia
What it is
G47.59 identifies parasomnias that do not fit a more specific sleep-disorder code. Use it for unusual behaviors, experiences, or movements occurring during sleep or sleep-wake transitions when documentation supports a parasomnia but not another named type.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include abnormal behaviors during sleep, partial arousals, confusion on awakening, or events reported by a bed partner that are consistent with a parasomnia.
When to use this code
Use this code when the clinician documents a parasomnia and the record does not support a more specific diagnosis such as sleepwalking, night terrors, or REM sleep behavior disorder. It is appropriate when the chart describes an atypical or unspecified parasomnia pattern. Check documentation if the subtype is unclear.
Do not use for
Do not use G47.59 if the documentation identifies a more specific parasomnia code or if the event is better explained by seizure activity, substance use, or another sleep disorder. Do not code it for nonspecific insomnia alone.
Coding tip
Before assigning G47.59, look for the exact parasomnia type in the note; if the subtype is named, code the more specific diagnosis instead.