2025 ICD-10-CM code G47.429
(Active) Effective Date: N/A Diseases of the nervous system - Sleep disorders 6 Feed
Narcolepsy in conditions classified elsewhere without cataplexy. This code should be used when narcolepsy without cataplexy is a component of other diseases classified elsewhere.
Medical necessity must be established by documenting the impact of both the underlying disease and narcolepsy on the patient's daily life and functioning.
Physicians diagnose narcolepsy based on medical history, symptoms, physical and mental examination, sleep studies (polysomnogram), and multiple sleep latency tests. Treatment may include lifestyle changes, stimulants, SSRIs, tricyclic antidepressants, and sodium oxybate. Treatment for any underlying condition is also necessary.
In simple words: Narcolepsy without cataplexy is a sleep disorder where you feel very sleepy during the day and have trouble sleeping at night.You might fall asleep suddenly, even during normal activities, but without losing muscle control. This code is used when another health problem is the main issue, and the narcolepsy is a secondary concern. The main health problem should be coded first.
Narcolepsy in conditions classified elsewhere without cataplexy refers to a sleep disorder characterized by excessive sleepiness during daytime and trouble sleeping at night, leading an individual to fall asleep suddenly during any activity. It occurs without cataplexy (loss of muscle tone triggered by intense emotion). This code should be used when this disease is a component of other diseases classified elsewhere. The primary disease should be coded first.
Example 1: A patient with multiple sclerosis also experiences excessive daytime sleepiness and sudden sleep attacks without cataplexy. The multiple sclerosis would be coded first, followed by G47.429., A patient with Parkinson's disease is also found to have narcolepsy without cataplexy. Parkinson's disease is coded first, and G47.429 is used as a secondary code., A patient undergoing chemotherapy for cancer experiences symptoms of narcolepsy without cataplexy as a side effect. The cancer diagnosis is coded first, followed by G47.429.
Documentation should include medical history, sleep patterns, symptom details (sleep attacks, daytime sleepiness), results of sleep studies (polysomnogram and MSLT if conducted), presence or absence of cataplexy, and details of the underlying condition.
** This code helps to specify the presence of narcolepsy as a secondary condition and facilitates better tracking of the complex interplay between narcolepsy and other medical conditions.
- Payment Status: Active
- Specialties:Sleep medicine, Neurology, potentially other specialties depending on the underlying condition.
- Place of Service:Inpatient Hospital, On Campus-Outpatient Hospital, Off Campus-Outpatient Hospital, Office, Sleep centers