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Debbie Zimmerman is the Corporate Chief Medical Officer of Lumeris & Essence Healthcare

Debbie Zimmerman, MD

Corporate Chief Medical Officer, Lumeris & Essence Healthcare

In her role as Corporate Chief Medical Officer for Lumeris, Dr. Zimmerman builds the clinical strategy for the organization to support the Lumeris operating model. She directs the physician leadership team in supporting health systems transform their organizations to deliver value-based care, including developing and implementing clinical programs and quality management functions. Dr. Zimmerman also leads Lumeris University, where she is responsible for all internal employee training and onboarding, physician mentoring and PCP boot camps, clinical content and the Lumeris Innovation Conference. She is Chief Medical Officer for Essence Healthcare, a high performing Medicare Advantage plan which has averaged 4.5 Stars for the last 11 years. 

Dr. Zimmerman has a long and distinguished history of medical leadership at health plans such as Cigna, Group Health Plan and Health Partners of the Midwest. Before joining Essence Healthcare, she served as Chief Medical Officer of Mercy Health Plans, a provider-sponsored plan owned by Sisters of Mercy. She is also an accomplished entrepreneur, having co-founded a successful disease and complex case management firm. Dr. Zimmerman practiced internal medicine for 15 years and is licensed to practice in Missouri. 


Find out why health systems and physician groups across the country partner with Lumeris.​