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2. ICD-10 Codes
3. Chapter - G00-G99
4. Section - G00-G09
5. Category - G04
6. G04.9

G04.9 - Encephalitis, myelitis and encephalomyelitis, unspecified

• Applicable to Encephalitis, myelitis and encephalomyelitis, unspecified
• The 2025 edition of ICD10-CM G04.9 became effective on October 1, 2024.
• This is the American ICD10-CM version of G04.9 - other international versions of ICD10 G04.9 may differ.
• G04.9 is a Non-Billable / Non-Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• G04.9 Code should not be used for billing or reimbursement purposes as there are multiple ICD-10 CM codes below it that contain a greater level of detail.

The following codes above G04.9 contain annotation back-references that may be applicable to G04.9:

• Chapter: G00-G99 - Diseases of the nervous system
• Section: G00-G09 - Inflammatory diseases of the central nervous system
• Category: G04 - Encephalitis, myelitis and encephalomyelitis

Browse other similar CM codes:

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.