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2. ICD-10 Codes
3. Chapter - G00-G99
4. Section - G00-G09
5. Category - G04
6. G04.01

G04.01 - Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)

• Applicable to Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)
• The 2025 edition of ICD10-CM G04.01 became effective on October 1, 2024.
• This is the American ICD10-CM version of G04.01 - other international versions of ICD10 G04.01 may differ.
• G04.01 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

Type 1 Excludes

• post chickenpox encephalitis (B01.1)
• post measles encephalitis (B05.0)
• post measles myelitis (B05.1)

The following codes above G04.01 contain annotation back-references that may be applicable to G04.01:

• 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.