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G47.42

Non-billable

Narcolepsy in conditions classified elsewhere

G47.42 is the ICD-10-CM code for Narcolepsy in conditions classified elsewhere. It is a non-billable category code — use a more specific child code such as G47.421 for billing.

Status
Header (non-billable)
Chapter
G00-G99
Parent
G47.4
Subcodes
2
Edition
FY2026

G00-G99 Diseases of the nervous system

Code first

  • •underlying condition

Frequently asked questions

What is ICD-10 code G47.42?
G47.42 is the ICD-10-CM code for "Narcolepsy in conditions classified elsewhere". It falls under G00-G99 Diseases of the nervous system.
Is G47.42 a billable code?
No — G47.42 is a non-billable header code. Use a more specific child code (such as G47.421) for billing.
What are the subcodes of G47.42?
G47.42 has 2 more specific child codes, including G47.421, G47.429.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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