October 1 update. Our PDGM and ICD-10 tools now use the FY2027 code set: 190 codes added, 30 deleted, and no existing code changed clinical group.

See what changed

ICD-10 · PDGM grouping

G35-G37 — Demyelinating diseases of the central nervous system

Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.2.26.

ICD-10-CM FY2027 · CMS grouper v07.2.26

Codes in range

21

No clinical group

0

A period cannot be grouped from these.

Barred as primary

0

CMS rejects these in the primary position.

Where these codes group

21 of the 21 codes in G35-G37 group to Neuro Rehabilitation. Every code here is assigned a group.

Code families in G35-G37

One page per three-character family: every code in it, whether it can lead a claim, its clinical group and comorbidity subgroup.

Every code in G35-G37

Descriptions are CMS’s own, abbreviated as CMS abbreviates them.

CodeDescriptionClinical groupPrimary position
G35ARelapsing-remitting multiple sclerosisBCan lead a claim
G35B0Primary progressive multiple sclerosis, unspecifiedBCan lead a claim
G35B1Active primary progressive multiple sclerosisBCan lead a claim
G35B2Non-active primary progressive multiple sclerosisBCan lead a claim
G35C0Secondary progressive multiple sclerosis, unspecifiedBCan lead a claim
G35C1Active secondary progressive multiple sclerosisBCan lead a claim
G35C2Non-active secondary progressive multiple sclerosisBCan lead a claim
G35DMultiple sclerosis, unspecifiedBCan lead a claim
G360Neuromyelitis optica [Devic]BCan lead a claim
G361Acute and subacute hemorrhagic leukoencephalitis [Hurst]BCan lead a claim
G368Other specified acute disseminated demyelinationBCan lead a claim
G369Acute disseminated demyelination, unspecifiedBCan lead a claim
G370Diffuse sclerosis of central nervous systemBCan lead a claim
G371Central demyelination of corpus callosumBCan lead a claim
G372Central pontine myelinolysisBCan lead a claim
G373Acute transverse myelitis in demyelinating disease of cnslBCan lead a claim
G374Subacute necrotizing myelitis of central nervous systemBCan lead a claim
G375Concentric sclerosis [Balo] of central nervous systemBCan lead a claim
G3781Myelin oligodendrocyte glycoprotein antibody diseaseBCan lead a claim
G3789Other specified demyelinating diseases of cnslBCan lead a claim
G379Demyelinating disease of central nervous system, unspecifiedBCan lead a claim

Source: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.

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