UnitedHealthcare is the largest health insurer in the United States by revenue, serving tens of millions of members through employer-sponsored, individual, Medicare, and Medicaid plans. Their network covers more than 1.3 million physicians and care professionals and thousands of hospitals, giving most members access to local in-network providers wherever they live. For employers shopping health benefits, UnitedHealthcare’s scale means consistent network access across different geographies — which matters when your workforce isn’t concentrated in one place.