ICD-10 Code G47.19 – Other hypersomnia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G47.19 – Other hypersomnia
What it is
G47.19 identifies hypersomnia that does not fit a more specific sleep disorder code. Use it when documentation describes excessive sleepiness or prolonged sleep time without a clearer cause.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include persistent daytime sleepiness, long sleep episodes, difficulty waking, or sleep inertia when the chart supports a hypersomnia diagnosis.
When to use this code
Use G47.19 when the provider documents other hypersomnia, idiopathic hypersomnia, or a similar nonspecific hypersomnia diagnosis and no more specific ICD-10-CM code applies. It may also fit cases where excess sleepiness is described but narcolepsy, sleep apnea, and medication-related causes are excluded in the record.
Do not use for
Do not use this code for narcolepsy, sleep apnea, or hypersomnia clearly due to another condition or substance. Check documentation if the chart points to a specific sleep disorder or another primary diagnosis.
Coding tip
Code the documented sleep disorder exactly as stated, and verify whether the provider excluded more specific causes before assigning G47.19.