ICD-10 Code G47.50 – Parasomnia, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G47.50 – Parasomnia, unspecified
What it is
G47.50 identifies parasomnia when the specific type is not documented. Use it for abnormal behaviors or experiences that occur during sleep or sleep-wake transitions, without a more precise diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Notes may describe sleepwalking, sleep terrors, confusional arousals, or other unusual behaviors during sleep that are not better classified.
When to use this code
Use this code when the record clearly supports a parasomnia but does not name a specific subtype. It may also fit when the clinician documents parasomnia and leaves the type unspecified. If another sleep disorder explains the event, code the more specific diagnosis instead.
Do not use for
Do not use G47.50 for insomnia, sleep apnea, or seizures unless the documentation specifically supports parasomnia. Check documentation if the episode is better described by another sleep or neurologic disorder.
Coding tip
Query for the exact parasomnia type when the note is vague, because a more specific code is often available.