Robert D. MacArthur, MD

Chief Medical Officer

As Chief Medical Officer, Rob provides leadership across the entire Commonwealth Care Alliance organization and executive oversight for all clinical delivery, care management, clinical operations, quality, and member experience functions. Prior to joining CCA, Rob served as the National Medical Director for Optum Health’s (United Health Group) Complex Care Management business segment, the nation’s largest group of institutional, chronic disease, and dual special needs plans across 29 different states. These plans serve the needs of the frail and elderly residing in the community, assisted-living campus