Other acute disseminated demyelination (G36) ICD-10-CM
The G36 code range covers other acute disseminated demyelination with 5 ICD-10-CM diagnosis codes. 4 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- postinfectious encephalitis and encephalomyelitis NOS G04.01
Codes in the G36 Range 5 codes · 4 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the G36 range.
Neuromyelitis Optica
A syndrome characterized by acute OPTIC NEURITIS; MYELITIS, TRANSVERSE; demyelinating and/or necrotizing lesions in the OPTIC NERVES and SPINAL CORD; and presence of specific autoantibodies to AQUAPORIN 4.
About the G36 Code Range
ICD-10 code section G36 covers various types of acute disseminated demyelination, conditions characterized by the rapid loss of the protective covering (myelin) around nerve fibers in the central nervous system. These codes specifically identify distinct forms of sudden demyelinating diseases that affect the brain and spinal cord.
This section includes codes for Neuromyelitis optica (G36.0), also known as Devic disease or demyelination of the spinal cord, which primarily affects the optic nerves and spinal cord. Another code, G36.1, represents acute and subacute hemorrhagic leukoencephalitis (Hurst disease), which features a severe, often rapidly progressing inflammation and demyelination of brain tissue, sometimes called acute hemorrhagic leukoencephalitis or acute disseminated encephalomyelitis. Additionally, G36.8 covers other specified types of acute demyelination that don’t fit these categories, while G36.9 is used when the specific type of acute disseminated demyelination is not clearly specified. These ICD-10 codes help healthcare providers accurately classify and document these serious nervous system disorders for diagnosis, treatment, and billing purposes.
Questions About This Page
How many billable codes are in the G36 range?
Of the 5 codes in this range, 4 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the G36 range classify?
The range classifies other acute disseminated demyelination. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
