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Meet our leadership team

Alan Lotvin, MD
Executive Vice President, CVS Health®; President, CVS Caremark®

Alan Lotvin, MD, is executive vice president and president of CVS Caremark, the company’s pharmacy benefits management (PBM) business. In this role, Alan oversees all aspects of the PBM business including sales and account management, operations, mail service pharmacy and specialty pharmacy. Alan also drives CVS Kidney Care®, new business development and client relationship management and retention.

Alan began his career as a practicing cardiologist in New Jersey. He holds a master's degree in medical informatics from Columbia University and a medical degree from the State University of New York Health Sciences Center at Brooklyn.

Bruce Culleton, MD
Vice President and Chief Medical Officer, CVS Kidney Care

Bruce Culleton provides medical oversight and guidance to all strategic initiatives for CVS Kidney Care. Before joining CVS Health in 2017, he spent more than 10 years in the medical device industry in a variety of global medical affairs and clinical development roles. He has also worked as an academic nephrologist and has published more than 100 scientific papers related to chronic kidney disease, dialysis and clinical practice guidelines.

Bruce received his medical degree and fellowship diplomas in internal medicine and nephrology from the Royal College of Canada. He also earned a fellowship diploma in clinical epidemiology from the Framingham Heart Study and an MBA from the Kellogg School of Management at Northwestern University.

Michael Vollmer
Vice President and Chief Operating Officer, CVS Kidney Care

Michael Vollmer provides broad strategic guidance and operational oversight of the CVS Kidney Care portfolio of products and services. Previously, Michael served as division vice president at DaVita, where he managed kidney dialysis operations in the Missouri and Arkansas markets. He also served as the director of the Innovations Accelerator Team at Ascension, where he led a nationwide launch and operationalization of the first synchronous online care capability of any hospital system in the U.S. and launched a nationwide health care finance and travel company.

Michael received his BS in business administration and an MBA from Washington University in St. Louis. He also attended the U.S. Naval Academy (USNA).

Tim Raducha-Grace
Vice President, Commercialization, CVS Kidney Care

Tim Raducha-Grace and his team are responsible for driving strategic growth for CVS Kidney Care® by incubating new products, deploying market strategies and building strategic partnerships. He also oversees digital, technology and data strategy.

Before joining CVS Health®, Tim served as senior vice president and head of Global Client Solutions Partnership Office at Syneos Health, where he established a go-to-market/partnership office for top clients. He also served as the vice president of National Clinical Market Performance at Bright Health, where he was responsible for growing market clinical teams and building payer/provider partnerships. Tim spent 15 years at IBM in numerous roles of increasing responsibility and worked as a top health care aide to U.S. Senator Russ Feingold (D-WI) and as Professional Staff for the U.S. Senate Homeland Security and Governmental Affairs Committee.

Tim earned his BA from Beloit College and his MBA in marketing and finance from New York University.