ICD-10-CM 2027 diagnosis code

G36Other acute disseminated demyelination

Not billable — use a more specific code

G36 is a header code, so it can't be reported by itself. Choose one of the 4 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 G36

G36 is the ICD-10-CM diagnosis code for other acute disseminated demyelination. 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 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: G36.0 ([Devic]), G36.1 ([Hurst]), G36.8 (demyelination) and G36.9 (unspecified).

Don't report G36 together with the conditions in its Excludes1 note: postinfectious encephalitis and encephalomyelitis NOS (G04.01).

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 G36

Coding notes

Excludes1Not coded here — never report together with this code

postinfectious encephalitis and encephalomyelitis NOS (G04.01)

Notes that apply from higher levels

Instructions written at a parent level also apply to G36.

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

Code history

2016
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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 G36

Is G36 billable?: No. G36 is a header code. Report one of its more specific subcodes instead.