Mayes Connections

About the Speakers


Michael E. Castagna P'00 PharmD, MBA
Michael E. Castagna P'00, PharmD, MBA
Vice President
Global Biosimilars Commercial Lead, Amgen

Dr. Michael Castagna is responsible for developing and executing the global commercial strategy for Amgen's portfolio of nine biosimilar medicines. Dr. Castagna has over 19 years of experience in the pharmaceutical, hospital, and specialty pharmacy industries. His pharmaceutical experience includes prelaunch and launch experience in numerous specialty classes, as well as portfolio management, medical affairs and strategic planning. Dr. Castagna was previously head of the US Biosimilars business unit for Sandoz where he re-launched Omnitrope. Prior to Sandoz, Dr. Castagna was with EMD (Merck) Serono, Bristol-Myers Squibb, and Pharmasset prior to it being acquired by Gilead.

Dr. Castagna received his pharmacy degree from Philadelphia College of Pharmacy, doctor of pharmacy from Massachusetts College of Pharmacy and holds a MBA from The Wharton School of Business at the University of Pennsylvania.

Mesfin Tegenu, MS, RPh
Mesfin Tegenu, MS, RPh
PerformRx, LLC.

Mesfin Tegenu is the president of PerformRx, LLC. A clinical pharmacist and executive with more than 25 years of experience, Tegenu's vision has resulted in the development of leading-edge pharmacy benefit solutions that enable health plans to improve member outcomes while reducing costs.

Tegenu spearheaded the creation of PerformRx after successfully developing a comprehensive in-house pharmacy benefit management program for a national provider of managed care services. Under his leadership, PerformRx has grown to offer next generation pharmacy benefits to millions of people nationwide. Tegenu is active in the community and currently serves on the board of multiple civic organizations. In addition to his New York State Pharmacy license, Tegenu holds a bachelor of pharmacy degree from Addis Ababa University (Addis Ababa, Ethiopia) and a master of science degree from St. John's University.


Robert I. Field, JD, MPH, PhD
Robert I. Field, JD, MPH, PhD
Professor of Law and Professor of Health Management and Policy
Drexel University

Dr. Robert I. Field is professor of law at the Kline School of Law and professor of health management and policy at the Dornsife School of Public Health at Drexel University. He is also a lecturer in health care management at the Wharton School of the University of Pennsylvania and a senior fellow of Penn's Leonard Davis Institute of Health Economics.

Dr. Field is the author of numerous scholarly articles on health law and policy and of two books, Mother of Invention: How the Government Created "Free-Market" Health Care and Health Care Regulation in America: Complexity, Confrontation and Compromise, both published by Oxford University Press. Before joining Drexel, he founded and chaired the Department of Health Policy and Public Health at University of the Sciences, led physician practice acquisitions for the University of Pennsylvania Health System, and practiced health law with the Philadelphia firm of Ballard Spahr.

Dr. Field writes and edits a blog on health policy for the Philadelphia Inquirer called Health Cents. He is frequently quoted in the press, including stories in the New York Times, Wall Street Journal, Washington Post, Boston Globe, Philadelphia Inquirer, and BusinessWeek and has appeared as a guest on CNN, MSNBC, NPR, and local television and radio stations.

He received a PhD in psychology from Boston University, MPH from the Harvard School of Public Health, JD from Columbia Law School, and AB magna cum laude from Harvard College.

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