2027 ICD-10-CM Diagnosis Code G36Other acute disseminated demyelination

ICD-10-CM Codes›G00–G99›G35-G37›G36

ICD-10-CM G36
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

G36 is a non-billable ICD-10-CM category code for other acute disseminated demyelination, so it cannot be submitted on claims. Use a more specific code from this category instead, such as G36.0, G36.1, G36.8, and G36.9.

Code Identity

ICD-10-CM Code
G36
Billable Status
No — Non-Billable Category
Code Describes
Other acute disseminated demyelination
Short Description
Other acute disseminated demyelination
Same as the full description in the CMS dataset.
Chapter
G35-G37
Demyelinating diseases of the central nervous system

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG35-G37Demyelinating diseases of the central nervous system
CategoryG36Other acute disseminated demyelination
This CodeG36Other acute disseminated demyelination

Specific Coding for Other acute disseminated demyelinationOverview

Non-specific codes like G36 require more characters. Use one of these billable codes instead:

  • Use G36.0 for Neuromyelitis optica [Devic]

  • Use G36.1 for Acute and subacute hemorrhagic leukoencephalitis [Hurst]

  • Use G36.8 for Other specified acute disseminated demyelination

  • Use G36.9 for Acute disseminated demyelination, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G36: its own notes plus those printed at Chapter 6. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • postinfectious encephalitis and encephalomyelitis NOS (G04.01)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 6 (G00-G99) Diseases of the nervous system applies to 700 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

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Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About G36Overview

What is the ICD-10 code for other acute disseminated demyelination?

G36 is the ICD-10-CM category for other acute disseminated demyelination, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is G36 (Other acute disseminated demyelination) a billable code?

No. This is a category header that groups the codes for other acute disseminated demyelination, and headers cannot be submitted on claims. Claims for other acute disseminated demyelination need a more specific code from this category, such as G36.0, G36.1, and G36.8.

Can G36 be reported with G04.01?

Not as a rule. The Excludes1 note on G36 lists "postinfectious encephalitis and encephalomyelitis NOS (G04.01)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).