ICD-10 Code G35.B2 – Non-active primary progressive multiple sclerosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G35.B2 – Non-active primary progressive multiple sclerosis
What it is
This code identifies primary progressive multiple sclerosis that is not currently active. Use it when documentation shows a progressive MS course without recent relapses or MRI activity.
Clinical signs
Clinical features vary; refer to documentation. Commonly, you may see steadily worsening neurologic deficits over time, such as gait difficulty, weakness, or spasticity, without evidence of recent inflammatory activity.
When to use this code
Use G35.B2 when the record specifically states non-active primary progressive MS. This is appropriate for follow-up visits, problem lists, or assessments describing progression without relapse or active disease. Check documentation if activity status is unclear.
Do not use for
Do not use this code for relapsing-remitting MS, active progressive MS, or unspecified MS. If the note does not clearly identify the subtype and activity status, check documentation.
Coding tip
Code the MS subtype and activity status exactly as documented; “non-active” is not interchangeable with “stable” unless the provider states it.