ICD-10 Code G47.419 – Narcolepsy without cataplexy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G47.419 – Narcolepsy without cataplexy
What it is
G47.419 identifies narcolepsy without cataplexy, a sleep disorder marked by excessive daytime sleepiness. The diagnosis applies when cataplexy is not documented.
Clinical signs
Common findings include irresistible sleep attacks, persistent daytime sleepiness, and disrupted sleep-wake control. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents narcolepsy and specifically states that cataplexy is absent. It also fits cases where narcolepsy is confirmed but cataplexy is not mentioned in the record. Check documentation if the type is unclear.
Do not use for
Do not use this code for narcolepsy with cataplexy or for nonspecific daytime sleepiness without a narcolepsy diagnosis. Avoid it when documentation supports another sleep disorder.
Coding tip
Confirm whether cataplexy is present or absent before assigning the code.