Multiple sclerosis
In Demyelinating diseases of the central nervous system (G35-G37), chapter 6: Diseases of the Nervous System
8 billable codes under G35: none are a CC or MCC; all map to HCC 198 (Multiple Sclerosis).An HCC counts toward a Medicare Advantage patient's risk score.
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Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers default dominant or nondominant side for hemiplegia and monoplegia, and use and sequencing of G89 pain codes, including postoperative, chronic, and neoplasm-related pain.
- Dominant/nondominant side (page 45)
- Pain - Category G89 (page 45)
All codes under G35
G35 can't be used on a claim. Pick a billable code below; grey headings group them.
- G35.ARelapsing-remitting multiple sclerosis
- G35.BPrimary progressive multiple sclerosis
- G35.B0Primary progressive multiple sclerosis, unspecified
- G35.B1Active primary progressive multiple sclerosis
- G35.B2Non-active primary progressive multiple sclerosis
- G35.CSecondary progressive multiple sclerosis
- G35.C0Secondary progressive multiple sclerosis, unspecified
- G35.C1Active secondary progressive multiple sclerosis
- G35.C2Non-active secondary progressive multiple sclerosis
- G35.DMultiple sclerosis, unspecified
G35 MS-DRGs
As the principal diagnosis, all 8 billable codes under G35 group to MS-DRG 058, 059, or 060 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
Other codes that refer to G35
Notes on these codes point to G35.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Multiple Sclerosis
Multiple sclerosis (MS) is a disease that affects your brain and spinal cord, also called the central nervous system. MS damages myelin, the protective coating around your nerve cells. Myelin helps nerves send messages quickly. When it's damaged, messages between your brain and body slow down or get blocked. This leads to MS symptoms.
Read more about multiple sclerosis on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015.
- FY2026: Subcodes were added, so G35 is no longer billable on its own. New codes for cases coded here before: G35.A (Relapsing-remitting multiple sclerosis), G35.B0 (Primary progressive multiple sclerosis, unspecified), G35.B1 (Active primary progressive multiple sclerosis), G35.B2 (Non-active primary progressive multiple sclerosis), G35.C0 (Secondary progressive multiple sclerosis, unspecified), G35.C1 (Active secondary progressive multiple sclerosis), G35.C2 (Non-active secondary progressive multiple sclerosis), G35.D (Multiple sclerosis, unspecified).
ICD-9-CM equivalent
Legacy crosswalk from the CMS General Equivalence Mappings (last updated 2018).
- 340 Multiple sclerosis