G35.B Primary progressive multiple sclerosis

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Primary progressive multiple sclerosis is G35.B (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
G35-G37: Demyelinating diseases of the central nervous system (G35-G37)
Category G35
11 codes (8 billable)
FY2026 Status
New code in FY2026

Official Coding Guidelines

Dominant/nondominant side (TOC entry)

a. Dominant/nondominant side ................................................................................................. 45

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.6.a
Pain - Category G89 (TOC entry)

b. Pain - Category G89.............................................................................................................. 45

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.6.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

Parent Code

G35 Multiple sclerosis

More Specific Codes

G35.B0 Primary progressive multiple sclerosis, unspecified G35.B1 Active primary progressive multiple sclerosis G35.B2 Non-active primary progressive multiple sclerosis

Related Codes in G35

G35 Multiple sclerosis 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.C Secondary 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
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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