ICD-10 Code G04.39 – Other acute necrotizing hemorrhagic encephalopathy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G04.39 – Other acute necrotizing hemorrhagic encephalopathy
What it is
G04.39 identifies a rare inflammatory brain disorder marked by acute necrosis and hemorrhage. Use it when the record specifically documents other acute necrotizing hemorrhagic encephalopathy.
Clinical signs
Clinical features vary; refer to documentation. Reports may describe acute neurologic decline, altered mental status, seizures, or focal deficits, with imaging or pathology supporting hemorrhagic necrotizing encephalopathy.
When to use this code
Use this code when the provider documents this exact encephalopathy diagnosis or clearly equivalent wording. It may apply after neurologic evaluation, neuroimaging, or pathology confirms the condition. Check documentation if the term is abbreviated or uncertain.
Do not use for
Do not use it for nonspecific encephalopathy, encephalitis, or hemorrhage without necrotizing brain involvement. If the record names a different neurologic disorder, code that diagnosis instead.
Coding tip
Code from the provider’s final diagnosis, and query if “hemorrhagic encephalopathy” is mentioned without the necrotizing qualifier.