Demyelinating diseases of the central nervous system (G35-G37) ICD-10-CM
The G35–G37 section covers demyelinating diseases of the central nervous system with 27 ICD-10-CM diagnosis codes, of which 21 are billable in fiscal year 2027. The section is organized into the 3 code ranges listed below.
Code Ranges in This Section 3 ranges · 27 codes
| Code Range | Title | Codes | Billable |
|---|---|---|---|
| G35 | Multiple sclerosis (G35) | 11 | 8 |
| G36 | Other acute disseminated demyelination (G36) | 5 | 4 |
| G37 | Other demyelinating diseases of central nervous system (G37) | 11 | 9 |
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the G35–G37 Code Range
Demyelinating diseases involve the loss of myelin in the central nervous system. This group includes multiple sclerosis and other forms of demyelination.
G35 groups multiple sclerosis by its named form: relapsing-remitting, primary progressive, secondary progressive, or unspecified. G36 groups other acute disseminated demyelination by named condition, with options for other specified and unspecified forms. G37 groups other demyelinating diseases by named form or central nervous system site, such as the corpus callosum or pons. It also has other specified and unspecified options.
FY 2027 changes: The FY 2027 ICD-10-CM update, effective October 1, 2026, deleted G35.
Questions About This Page
How many codes are in the G35-G37 range?
The G35-G37 range contains 27 ICD-10-CM diagnosis codes in FY 2027. 21 of them are billable, and the rest are category headers that organize the section.
What conditions does G35-G37 cover?
The range covers demyelinating diseases of the central nervous system. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
