G04
Non-billableEncephalitis, myelitis and encephalomyelitis
G04 is the ICD-10-CM code for Encephalitis, myelitis and encephalomyelitis. It is a non-billable category code — use a more specific child code such as G04.0 for billing.
- Status
- Header (non-billable)
- Chapter
- G00-G99
- Subcodes
- 6
- Edition
- FY2026
G00-G99 Diseases of the nervous system
Includes
- •acute ascending myelitis
- •meningoencephalitis
- •meningomyelitis
Excludes1 — not coded here
- •encephalopathy NOS (G93.40)
Excludes2 — not included here
Frequently asked questions
- What is ICD-10 code G04?
- G04 is the ICD-10-CM code for "Encephalitis, myelitis and encephalomyelitis". It falls under G00-G99 Diseases of the nervous system.
- Is G04 a billable code?
- No — G04 is a non-billable header code. Use a more specific child code (such as G04.0) for billing.
- What is excluded from G04?
- Excludes1 (not coded here): encephalopathy NOS (G93.40).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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