ICD-10-CM Diagnosis Code G04.90
Diagnosis Code: G04.90 (Raw: G0490)
Description: Encephalitis and encephalomyelitis, unspecified
Classification: International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM)
Fiscal Year: 2026
CMS Section 111 Status: Valid for reporting.
Overview & Clinical Details
ICD-10-CM code G04.90 is designated for Encephalitis and encephalomyelitis, unspecified. In medical documentation and insurance billing, this code is utilized to specify medical diagnosis for patient records, reimbursement workflows, and compliance under CMS Section 111 mandatory insurer reporting guidelines.