ICD-10 Code G36.1 – Acute and subacute hemorrhagic leukoencephalitis [Hurst] (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G36.1 – Acute and subacute hemorrhagic leukoencephalitis [Hurst]
What it is
G36.1 identifies acute or subacute hemorrhagic leukoencephalitis, also called Hurst disease. It is a rare, severe inflammatory disorder of the central nervous system that affects white matter and may include hemorrhage.
Clinical signs
Clinical features vary; refer to documentation. Typical descriptions include rapid neurologic decline, encephalopathy, focal deficits, seizures, and findings consistent with acute demyelinating disease. Imaging and specialist assessment usually support the diagnosis.
When to use this code
Use G36.1 when the provider documents acute or subacute hemorrhagic leukoencephalitis, Hurst disease, or an equivalent confirmed diagnosis. You may also use it when the record clearly links the episode to this specific inflammatory demyelinating condition. Check documentation if the chart only says encephalitis, leukoencephalopathy, or hemorrhage without this diagnosis.
Do not use for
Do not use this code for nonspecific encephalitis, other demyelinating disorders, or cerebrovascular hemorrhage without documented hemorrhagic leukoencephalitis. If the record is unclear, check documentation.
Coding tip
Code only when the provider names Hurst disease or acute hemorrhagic leukoencephalitis explicitly; otherwise, query for clarification.