ICD-10-CM 2027 diagnosis code

G37Other demyelinating diseases of central nervous system

Not billable — use a more specific code

G37 is a header code, so it can't be reported by itself. Choose one of the 8 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About G37

G37 is the ICD-10-CM diagnosis code for other demyelinating diseases of central nervous system. It belongs to block G35-G37 (demyelinating diseases of the central nervous system) and chapter 6 (diseases of the nervous system). It is a header code, so it can't be reported by itself; one of its 8 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: G37.0 (system), G37.1 (callosum), G37.2 (myelinolysis), G37.3 (system), G37.4 (system), G37.5 (system), G37.8 (system) and G37.9 (unspecified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under G37

Notes that apply from higher levels

Instructions written at a parent level also apply to G37.

Broader instructions also apply from Chapter 6: Diseases of the nervous system.

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about G37

Is G37 billable?: No. G37 is a header code. Report one of its more specific subcodes instead.