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G04.9

Non-billable

Encephalitis, myelitis and encephalomyelitis, unspecified

G04.9 is the ICD-10-CM code for Encephalitis, myelitis and encephalomyelitis, unspecified. It is a non-billable category code — use a more specific child code such as G04.90 for billing.

Status
Header (non-billable)
Chapter
G00-G99
Parent
G04
Subcodes
2
Edition
FY2026

G00-G99 Diseases of the nervous system

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code G04.9?
G04.9 is the ICD-10-CM code for "Encephalitis, myelitis and encephalomyelitis, unspecified". It falls under G00-G99 Diseases of the nervous system.
Is G04.9 a billable code?
No — G04.9 is a non-billable header code. Use a more specific child code (such as G04.90) for billing.
What are the subcodes of G04.9?
G04.9 has 2 more specific child codes, including G04.90, G04.91.

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

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