The impact of medical insurance on health care access and quality for people with multiple sclerosis in the United States: A scoping review.

Health insurance coverage and design strongly influences health care for pwMS in the United States and may be a modifiable social determinant of health. Increased pharmaceutical cost-sharing is associated with declines in DMT utilization and adherence. Further study is needed to better characterize the impacts of other core elements of health insurance, including prior authorization requirements and step therapy.