ICD-10 Code G35.A – Relapsing-remitting multiple sclerosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G35.A – Relapsing-remitting multiple sclerosis
What it is
G35.A identifies relapsing-remitting multiple sclerosis, a form of MS with distinct episodes of neurologic worsening followed by partial or complete recovery. Use it when the record specifically documents this disease course.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include neurologic deficits that come and go over time, such as visual, sensory, motor, or coordination problems, with periods of improvement between relapses.
When to use this code
Use this code when the provider clearly documents relapsing-remitting multiple sclerosis, including in assessment, problem list, or discharge diagnosis. It is appropriate when the note identifies the relapsing-remitting pattern rather than MS without subtype. If the subtype is unclear, check documentation before coding.
Do not use for
Do not use this code for multiple sclerosis without a documented relapsing-remitting course. Avoid it when the record describes a different MS subtype or only says “MS” without further detail.
Coding tip
Code the exact MS subtype documented; if the subtype is missing, query the provider rather than assuming relapsing-remitting disease.