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2. ICD-10 Codes
3. Chapter - G00-G99
4. Section - G35-G37
5. Category - G35
6. G35.B1

G35.B1 - Active primary progressive multiple sclerosis

• Applicable to Active primary progressive multiple sclerosis
• The 2026 edition of ICD10-CM G35.B1 became effective on October 1, 2025.
• This is the American ICD10-CM version of G35.B1 - other international versions of ICD10 G35.B1 may differ.
• G35.B1 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

• Primary progressive multiple sclerosis with evidence of inflammatory disease activity

The following codes above G35.B1 contain annotation back-references that may be applicable to G35.B1:

• Chapter: G00-G99 - Diseases of the nervous system
• Section: G35-G37 - Demyelinating diseases of the central nervous system
• Category: G35 - Multiple sclerosis

Browse other similar CM codes:

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.