ICD-10 Code G35.C2 – Non-active secondary progressive multiple sclerosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G35.C2 – Non-active secondary progressive multiple sclerosis
What it is
G35.C2 identifies secondary progressive multiple sclerosis that is no longer showing active inflammatory disease. Use it when documentation states the condition is non-active and the course is steadily progressive.
Clinical signs
Clinical features vary; refer to documentation. Typical records describe worsening neurologic disability over time, with progression rather than relapses, and no evidence of current active disease.
When to use this code
Use this code when the provider documents non-active secondary progressive multiple sclerosis, or when the record clearly states secondary progressive MS without current activity. It is appropriate for follow-up visits, problem lists, and chronic disease management when the non-active status is confirmed.
If the note only says multiple sclerosis, check documentation before assigning this code. You should not infer the subtype or activity status from symptoms alone.
Do not use for
Do not use it for relapsing-remitting MS, primary progressive MS, or active secondary progressive MS. If the documentation does not specify non-active disease, check documentation.
Coding tip
Code the exact MS subtype and activity status as documented; do not assume non-active disease from a stable visit note.