This study is designed to determine whether symptom burden differs by time to infusion.

Inclusion Criteria:

• Age 18-80
• Diagnosis of multiple sclerosis (revised 2017 criteria)
• EDSS 0-7
• Plans to initiate treatment with ocrelizumab within 6 months or has been on an approved regimen of ocrelizumab for >12 months as part of their clinical care
• Individual must be able to provide consent, read/write/comprehend English Language

Exclusion Criteria:

• Clinical relapse within 3 months of first on-study infusion
• Cognitive impairment limiting the ability to consent or fill out the electronic survey
• Currently pregnant, planning to become pregnant during the study period, or currently breastfeeding
• Untreated psychiatric illness (such as major depressive disorder, Bipolar disorder, psychotic disorder, schizophrenia)
• Active substance abuse disorder
• Significant medical comorbidities (such as history of severe traumatic brain injury, stroke, systemic cancer or chronic infection)
• Chemotherapy use within 6 months of first study infusion
• Prior treatment with alemtuzumab within 12 months of first study infusion
• Prior treatment with a B-cell depleting therapy other than ocrelizumab within 12 months of first on-study infusion

Patients receiving Multiple Sclerosis care at the NYU Comprehensive MS Care Center or the Elliot Lewis MS Center will be recruited. A clinical list of patients currently receiving ocrelizumab, or potentially starting ocrelizumab will be screened for study inclusion/exclusion criteria.