Senior Leadership Team

MedData’s seasoned management team possesses levels of expertise that extend across various functional areas.  Combined, senior management brings a total of 270 years of combined related experience to the business.

Ken BloemKen Bloem
Executive Chairman of the Board of Directors

Ken Bloem is Executive Chairman of the Board of Directors for MedData. From 2006 until MedDirect was acquired by MedData, he served as CEO and Chairman of MedDirect, a retail revenue cycle company serving hospitals and physician groups in 50 states.
His career includes leadership positions at four major academic health centers: CEO at Stanford University Hospital, CEO of Georgetown University Medical Center, EVP at University of Chicago Hospitals and Clinics, and AVP at Boston University Medical Center. He has also held board directorships of a number of for-profit and publicly held health companies (including CEO of the Advisory Board Company), contributed to health policy development through appointments to university and association fellowships and committees, and served as an international public health and health services administrator. From 2000 to 2005 he led planning efforts for the development of a major biomedical research center and hospital, sponsored by the Qatar Foundation, in conjunction with the new Cornell University Medical School established in Doha, Qatar. He is a former Peace Corps Volunteer and staff member (Malawi and Congo), and a graduate of Calvin College and Harvard School of Public Health. He has taught and/or held academic positions at Stanford University, University of Chicago, Harvard and Boston University.

He is a recipient of the World Health Organization's "Order of the Bifurcated Needle" award for his contributions to the successful global smallpox eradication program. He was a Senior Fellow at Johns Hopkins Center for Civilian Biodefense Strategies. In addition to his former consulting practice, he was a member of the American Hospital Association's Ad Hoc Committee on Payment for Health Services as well as multiple other professional task forces and committees. He currently serves on the boards of a number of healthcare enterprises.

Anne BarnesAnn Barnes
President and Chief Executive Officer

Ann Barnes has served as CEO since 2013, leading the company’s day-to-day business, as well as serving on MedData's Board of Directors. Barnes initially joined MedData as vice president of client services in November 2008 and was quickly promoted to the post of chief operating officer. In February 2013 Barnes was promoted to president, and in September 2013 to chief executive officer. Her career includes positions spanning sales, client services, operations and marketing functions. Before joining MedData, Barnes was executive vice president for the student loan division of Wachovia Bank. Previously, she led a national sales force for New Horizons Computer Learning, the world’s largest computer training company. During the first 18 months of her employment there, revenues grew from $12 million to $44 million. Prior, Barnes held various leadership roles with Avolent, an enterprise software solution for electronic bill payments. She began her career with Xerox Corporation in the mid-1980s, where she was consistently promoted into positions throughout the central and western regions. At the time of her departure in December 2000, she held the role of vice president, general market operations in the western region. 

Barnes is a graduate of the University of the Pacific in San Francisco.

Stephen F. GhiglieriStephen F. Ghiglieri
Chief Financial Officer

Stephen Ghiglieri has served as MedData's chief financial officer since 2013, prior to which he served as the executive vice president, chief operating officer and chief financial officer for NeurogesX, Inc., a commercial stage specialty pharmaceutical company, since October 2003. Stephen has also served as chief financial officer of Hansen Medical, Inc., a medical device company; executive vice president, chief financial officer and corporate secretary of Avolent, Inc., a software company; vice president, finance, chief financial officer and corporate secretary of Andromedia, Inc., a software company; vice president, finance and administration, chief financial officer and corporate secretary of Oacis Healthcare Systems, Inc., a healthcare technology company; controller of Oclassen Pharmaceuticals, Inc., a pharmaceutical company; and audit manager of PricewaterhouseCoopers, LLP.

Mr. Ghiglieri received a B.A. in business administration from California State University, Hayward, and is also a Certified Public Accountant (inactive).

Dr. Hallet WatzDr. Hallet Watz MD, MDA, FACEP
Chief Medical Officer

Dr. Hal Watz serves on the executive committee of MedData and holds the position of chief medical officer. Since 1987, he has led the billing, coding, and collection operations for Peak Emergency Medical Billing (PEAK), a billing service acquired by MedData in May 2008. In this capacity, he grew the business to one of the premier billing companies in the southwest. He is also a practicing Emergency Medicine Physician and president of Front Range Emergency Specialists. Dr. Watz utilizes his expertise in both medicine and billing management to provide strategic direction for the company as well as to drive tactical programs that optimize reimbursement and provide critical reporting and practice management information for clients.

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