G47.4Header code — not billable
Narcolepsy and cataplexy
- Chapter
- 6. Diseases of the nervous system
- Category
- G47
- Effective date
- October 1, 2026
Related codes in category G47
G47Sleep disordersG47.0InsomniaG47.00Insomnia, unspecifiedYesG47.01Insomnia due to medical conditionYesG47.09Other insomniaYesG47.1HypersomniaG47.10Hypersomnia, unspecifiedYesG47.11Idiopathic hypersomnia with long sleep timeYesG47.12Idiopathic hypersomnia without long sleep timeYesG47.13Recurrent hypersomniaYesG47.14Hypersomnia due to medical conditionYesG47.19Other hypersomniaYes
Frequently asked questions
What is ICD-10 code G47.4?
G47.4 is an ICD-10-CM diagnosis code for Narcolepsy and cataplexy.
Is G47.4 a billable code?
No. G47.4 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is G47.4 in?
G47.4 falls under Chapter 6: Diseases of the nervous system.
When did G47.4 become effective?
G47.4 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to G47.4?
G47.4 belongs to category G47, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.