ICD-10 Code G35 – Multiple sclerosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G35 – Multiple sclerosis
What it is
G35 identifies multiple sclerosis, a chronic demyelinating disease of the central nervous system. It is used when documentation confirms MS as the diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Common findings include neurologic deficits such as weakness, sensory changes, visual symptoms, imbalance, or episodes of worsening and partial recovery.
When to use this code
Use G35 when the provider documents multiple sclerosis as the confirmed condition, including relapsing or progressive forms if no more specific code is assigned. You may also use it for encounters focused on MS-related neurologic impairment.
Do not use it for nonspecific symptoms alone, or when the record only says “rule out MS.” Check documentation for the exact diagnosis and any associated manifestations.
Do not use for
Do not use G35 for isolated neurologic symptoms without a documented MS diagnosis. It is also not for other demyelinating disorders or suspected MS.
Coding tip
Confirm the provider’s documented MS type and any linked manifestations before coding, and code the confirmed diagnosis rather than symptoms alone.