ICD-10-CM 2027
ICD-10 code for acute hemorrhagic leukoencephalitis
Acute and subacute hemorrhagic leukoencephalitis [Hurst]
From the official ICD-10-CM alphabetic index entry “Leukoencephalitis › acute (subacute) hemorrhagic”. Page updated September 29, 2026.
About coding acute hemorrhagic leukoencephalitis
The ICD-10-CM code for acute hemorrhagic leukoencephalitis is G36.1 (Acute and subacute hemorrhagic leukoencephalitis [Hurst]). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on G36.1.
Within G36 (other acute disseminated demyelination), G36.1 is specifically for acute and subacute hemorrhagic leukoencephalitis [Hurst]. Related codes cover Neuromyelitis optica [Devic] (G36.0), other specified acute disseminated demyelination (G36.8) and acute disseminated demyelination, unspecified (G36.9).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 058 (Multiple Sclerosis and Cerebellar Ataxia with MCC, relative weight 1.8438), DRG 059 (Multiple Sclerosis and Cerebellar Ataxia with CC, relative weight 1.2002) and DRG 060 (Multiple Sclerosis and Cerebellar Ataxia without CC/MCC, relative weight 0.9247), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific acute hemorrhagic leukoencephalitis codes (official index)
- postimmunization or postvaccinal G04.02 — Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis
Common questions about acute hemorrhagic leukoencephalitis ICD-10 codes
What is the ICD-10 code for acute hemorrhagic leukoencephalitis?
- G36.1 — Acute and subacute hemorrhagic leukoencephalitis [Hurst]. More specific codes apply when the documentation supports them: G04.02.
What is the ICD-10 code for postimmunization or postvaccinal acute hemorrhagic leukoencephalitis?
- G04.02 — Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis.
Is G36.1 billable?
- Yes. G36.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G36.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G36.1 as a principal diagnosis.
Is G36.1 a CC or MCC?
- G36.1 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.