This multisite, prospective, cohort study of patients with MS evaluated patient-reported outcomes, pharmacists' actions, and DMT adherence/persistence. Patients reported low rates of impacted productivity, hospitalization, and relapse due to MS. Pharmacists commonly provided medication education and actions to ensure DMT safety and adherence. Patients had a high rate of adherence (median PDC 88%) and persistence (86% at 12 months). Findings support positive outcomes for HSSP patients.