About GlobalMed

Advisory Board

Telehealth Equipment | Telemedicine Carts

Bill Lewis, MD, MBA, Chief Medical Officer

As an expert in the field of occupational medicine, urgent care, telemedicine and utilization review, Dr. Lewis brings more than 30 years’ experience as both a physician and health care executive. 

Prior to joining GlobalMed, Dr. Lewis was the Senior Vice President, Medical Operations at Concentra, where he led the development and implantation of Concentra’s 300 Urgent Care Centers. Over the last five years, he focused on Employer Worksite clinics, Wellness and Telemedicine services.  Dr. Lewis currently serves in the following organizations:  WOEMA Board of Directors and Legislative Committee, Arizona State Industrial Commission Evidence Based Medicine Committee and the American Telemedicine Association Standards and Guidelines Primary Care Working Group.

Dr. Lewis received his BS from University of Cincinnati, medical degree from Ohio State University and did his residency at University of Oklahoma. He received his MBA from University of Phoenix.

Tony M. Astorga, CPA., Advisory Board Member

Mr. Astorga retired in 2011 from Blue Cross Blue Shield of Arizona where he served as the Senior Vice President & Chief Financial Officer since 1988 and as the Chief Business Development Officer since 2010. He also held the position as President of Blue Cross Blue Shield of Mexico from 1994-1999.

Mr. Astorga received a B.S. Degree in accounting with high honors from Arizona State University and has attended executive education programs at Fuqua School of Business - Duke University, Kellogg Graduate School of Management - Northwestern University, and Graduate Center for Health Professions – University of California San Francisco.

He is currently a member of the board of directors for the Arizona Community Foundation, Arizona Hispanic Chamber of Commerce, ASU Foundation, Catholic Charities, CSA General Insurance Agency, Financial Executives International, Phoenix Art Museum, and US Bank Arizona. In addition, he currently serves as chairman of the Arizona Hispanic Chamber of Commerce Foundation and has previously served in community leadership roles as co-chair of the Governor’s Citizens Finance Review Commission, Maricopa Community Colleges’ ACE Campaign Cabinet, and Governor’s Film and Television Commission.

He has been an active member of the community where he has previously served as a member of the Board of Directors of the Arizona Academy, Arizona-Mexico Commission, Arizona Coliseum and Exposition Center, Arizona Society of Certified Public Accountants, ASU Alumni Association, ACT International, Blue Cross Blue Shield of Arizona, Boy Scouts Grand Canyon Council, Chase Bank Arizona, Colonia Bank, Community Council, Compass Bank Arizona, Desert Botanical Garden, Diocesan Finance Council, Friendly House, Information and Referral Services, Maricopa Partnership of Arts and Culture, Norwest Bank Arizona, Pi Kappa Alpha House Corporation, Project Prevention, Quality Care Solutions, Inc., Regency Health Services, Inc., Sun Healthcare Group, Inc., Thunderbird – The American Graduate School Global Council, Valle del Sol, Valley of the Sun United Way, VSUW Foundation, and Wells Fargo Bank Arizona.

He is a member of the Arizona Academy, Arizona Hispanic Chamber of Commerce, American Institute of Certified Public Accountants, Arizona Society of Certified Public Accountants, and Financial Executives International.

He has received various civic and business awards, including the Arizona Hispanic Chamber of Commerce “1981 Professional of the Year”, the ASU College of Business “1985 Alumni Hall of Fame”, the Arizona Society of Certified Public Accountants “1995 Public Service Award”, the Valle del Sol, Inc. “1998 Profiles of Success Exemplary Leadership Award”, the Arizona State University “1999 Alumni Achievement Award”, the Anti-Defamation League “2000 Leaders of Distinction Award”, the Chicanos por la Causa “2001 Professional Achievement Award”, the Phoenix Art Museum “2011 Exemplary Service Award”, and the Boy Scouts of America “2011 Whitney Young Award”. He was also recognized in the Business Journal’s list of the “Valley’s 100+ Most Influential” in 1999-2000, “Valley Influential – Class of 2004”, and the Arizona Business Magazine “2008 Centers of Influence Award” which honored Arizona’s ten most influential financial executives and “2013 Twenty-five Most Influential Hispanic Leaders in AZ”.

Ricardo Martinez, MD, FACEP

Dr. Ricardo Martinez, M.D. FACEP is a nationally recognized board-certified emergency physician and thought leader in healthcare. He has held numerous leadership positions in the public and private sector, as well as academics. Dr. Martinez served as a division president and as executive vice president of medical affairs for The Schumacher Group. While there, Dr. Martinez oversaw administrative and clinical operations for one of the largest emergency department management firms in the nation, serving more than 180 hospitals in 23 states.

In addition, he was the Administrator of the National Highway Traffic Safety Administration (NHTSA) and since 1988, has been the senior medical advisor to the National Football League for the Super Bowl. He has also been an Assistant Professor of Surgery/Emergency Medicine, and associate director of Trauma Service at Stanford University Hospital, Stanford, California.

A native of New Orleans, Dr. Martinez received his undergraduate degree from Louisiana State University at Baton Rouge and his M.D. from Louisiana State University School of Medicine. He was chief resident of Emergency Medicine at Charity Hospital, New Orleans.            

Ronald K. Poropatich, MD

Dr. Ronald Poropatich is the Executive Director of the Center for Military Medicine Research, Health Sciences at the University of Pittsburgh. He is also a Professor of Medicine in the Division of Pulmonary, Allergy, and Critical Care Medicine at the University of Pittsburgh and serves as a Senior Advisor for Telemedicine, University of Pittsburgh Medical Center.

Dr. Poropatich is an experienced Pulmonary/Critical Care Medicine physician who served 30 years on active duty in the US Army retiring in 2012 at the rank of Colonel with extended assignments at the Walter Reed National Military Medical Center, Bethesda, MD and at the US Army Medical Research and Materiel Command (USAMRMC) at Fort Detrick, MD as the Deputy Director of the Telemedicine and Advanced Technology Research Center (TATRC).

Dr. Poropatich received his medical degree from Hahnemann University in 1985 (now Drexel University). He completed his internship and residency in Internal Medicine at the Walter Reed Army Medical Center (WRAMC) in 1988 and was selected as Chief of Medical Residents in the WRAMC Department of Medicine from 1988-1989. He completed his fellowships in Pulmonary and Critical Care Medicine in 1992 also at the WRAMC. As a full-time Pulmonary/Critical Care medicine physician from 1989 to 1995, Dr. Poropatich’s early research interests were in sarcoidosis, an inflammatory lung condition, and the general field of bronchoscopy.

Colonel/Retired Poropatich has extensive deployment experience and led the U.S. Army effort in the development and deployment of is telemedicine capability Since 1996, he has served as an Associate Editor for the “Telemedicine and e-Health Journal”, is the former Chair of the NATO Telemedicine Expert Team (2000-2012), and former President (2002-2003) and Board Member of the American Telemedicine Association since 1995.

Dr. Poropatich is a long-standing educator and has been faculty at the Uniformed Services University of the Health Science (USUHS), Bethesda, MD since 1985 and serves as a Professor of Medicine. He has over 60 publications in peer-reviewed medical journals, numerous book chapters, and edited 2 books on Telemedicine. He is a diplomate of the American Board of Internal Medicine in Medicine, Pulmonary and Critical Care Medicine. He is a Fellow of the American College of Physicians, Fellow of the American College of Chest Physicians and Fellow and past president of the American Telemedicine Association.

Major General Carl Schneider, USAF, Retired

During his illustrious military career in the United States Air Force, General Schneider flew more than 100 combat missions in Korea and served as a flight instructor.  While assigned to the Second Air Division in Vietnam, he helped establish a forward air control/air liaison officer program with the Republic of Vietnam Air Force. Following his days in combat aircraft, General Schneider was an executive officer to the Assistant Secretary of the Air Force in the area of financial management.  His later assignments included Deputy Commander for Operations and Commander of Moody Air Force Base in Valdosta, Georgia.

General Schneider retired from the Air Force in 1978 as Chief of Staff for the Air Force Logistics Command.  He has had a number of leadership roles in Veterans and healthcare projects since leaving active duty.  He helped establish Phoenix Children’s Hospital and helped found the Joe Foss Institute and the Adopt-A-Vet Program.  In 2009, he was inducted into the Arizona Veterans Hall of Fame Society.  He continues as an advisor to See-4-Vets and the Veterans Heritage Project.

Phil Johnson, M.D., Advisory Board Member

The son of American missionaries, Doctor Phil Johnson spent his childhood in the Himalayan Mountains and Sindh deserts of Pakistan where his parents focused on providing education, rural development and healthcare.  His interest in healthcare grew from there and led to him pursuing a degree in medicine, which he received from Northwestern University.  After an internship and residency in family practice at the University of Arizona Health Sciences Center, Dr. Johnson practiced in underserved areas of Arizona for Indian Health Services.  In 1992, he became a Fulbright Scholar at Aga Khan University Medical School in Karachi, Pakistan, where he set up postgraduate training programs for the university.  Dr. Johnson returned to the United States in 1994 and began work as an emergency physician at Summit Healthcare Regional Medical Center in Show Low, Arizona.  In 2003, he was named the hospital’s Emergency Room Medical Director and Chairman of the Emergency Department.  Dr. Johnson shares his expertise with medical students at Midwestern University College of Osteopathic Medicine in Glendale, Arizona, serving as a Clinical Assistant Professor.

Dr. Johnson holds multiple certifications in advanced life support for both adults and pediatric patients.  He has spoken at national and international conferences in the United States, Canada and Pakistan and is a published author of clinical literature.

His desire to provide the best care for his patients was the motive behind the founding of EMDTransfer in 2007, a cloud-based service that provides distant specialists with critical patients’ medical images.  This speeds up the decision-making process as to whether a patient needs to be transferred to a hospital that provides a higher level of care or remain at the original facility.  Unnecessary patient transfers add more layers of cost to the healthcare system, deprive community hospitals of needed revenue, and are an inconvenient burden to patients and their families. In late 2011, GlobalMed purchased EMDTransfer and added Dr. Johnson to its medical Advisory Board.

Phillip Joseph Silberberg, M.D., Advisory Board Member

Dr. Silberberg is presently a Staff Radiologist at Omaha Children’s Hospital, Omaha, NE. He has served as a Clinical Associate Professor-Radiology at Creighton University and the University of Nebraska Medical Center. Dr. Silberberg has also been an Associate Professor at Doernbecher Children’s Hospital and Oregon Health Sciences University for over nine years.

Currently, Dr. Silberberg is a member of the American Board of Radiology with a certificate of Added Qualifications in Pediatric Radiology. He has been a fellow of the Royal College of Physicians and Surgeons of Canada and a diplomat of the American Board of Radiology since 1993. Dr. Silberberg has been published in over 15 different peer reviewed journals and is a member of over eight professional societies, including the American roentgen Ray Society, the Radiologic Society of North America, the Fellow of Royal College of Physicians and Surgeons of Canada, the Society for Pediatric Radiology and the Society of Computer Assisted Radiography.

Dr. Silberberg graduated from the University of the Witwatersrand Medical School, Johannesburg, South Africa. He placed 29th out of 200 on the Surgical Merit List. He served his residency, in the department of Diagnostic Radiology, from McMaster University, Ontario, Canada. Dr. Silberberg performed a fellowship in Pediatric Radiology at the Hospital for Sick Children, Ontario, Canada. Dr. Silberberg served a rotating internship at Hillbrow General Hospital, in Johannesburg, South Africa.

Stephen W. Coons, M.D., Advisory Board Member

Dr. Coons received his Bachelor of Science degree in Chemistry from Yale University in 1978. He received his medical degree from the University of Arizona College Of Medicine in 1983 where he also completed his pathology residency in 1987. After completing a Neuropathology fellowship at Barrow Neurological Institute in 1989, he joined the staff at Barrow has been Chief of the Section of Neuropathology since 1996.

Dr. Coons’ principal research interest is in translating the results from basic research in the molecular genetics of brain tumors to clinical applications in the pathology laboratory. He also provides neuropathology support for a wide variety of projects directed by Barrow staff neurosurgeons, neurologists, residents, and fellows. Dr. Coons has published more than 20 chapters or review articles and more than 70 peer-reviewed papers related to nervous system tumors and other neurological topics.

Gerald Berry, M.D., Advisory Board Member

Dr. Gerald Berry has distinguished himself in the field of pathology during the course of his career, which spans more than two decades. He earned degrees in biology and philosophy from Saint Francis Xavier University in Antigonish, Nova Scotia, and his medical degree from the University of Ottawa in Ottawa, Ontario. Dr. Berry served an internship at Ottawa General Hospital from 1985-1987, and went on to complete residencies in both anatomic and surgical pathology at Stanford University Medical Center in Stanford, Calif. After spending a year as Chief Resident in Pathology, Dr. Berry was named Clinical Instructor in Surgical Pathology at Stanford in 1988. He remains a professor of pathology there, and currently serves as the hospital’s Director of Cardiac Pathology and Associate Director of Surgical Pathology.

Dr. Berry has contributed to hundreds of abstracts and articles published in professional medical journals, covering a wide variety of topics related to pathology.  He gives regular presentations at hospitals and conferences around the world, often with a special emphasis on pathology issues in heart and lung transplantation.

Dr. Daniel N. Sauder, M.D., Advisory Board Member

Dr. Daniel N. Sauder possesses a wealth of experience in a variety of areas throughout the medical field, with emphasis on dermatology. He earned a master’s degree in mathematics form York University in Toronto, Ontario, performed a dermatology residency at Cleveland Clinic in Cleveland, Ohio, and served four years as a Visiting Associate at the Dermatology Branch of the National Institutes of Health in Bethesda, Maryland. 

Dr. Sauder’s past positions include Professor and Chief of the University of Toronto Department of Dermatology, Noxell Professor and Chairman of the Johns Hopkins University School of Medicine, Senior Vice President of Clinical Development for Dr. Reddy’s Laboratories in Bridgewater, N.J., and Vice President of Clinical Development for Excaliard Pharmaceuticals. He is currently a Clinical Professor at the University of Medicine and Dentistry of New Jersey, as well as Staff Physician at the Princeton University Medical Center and a Dermatologist at Princeton Dermatology Associates. He is also a member of the American Melanoma Foundation, and was awarded the foundation’s Physician Recognition Award in 2005. He has worked as a consultant to several major biotechnology and pharmaceutical companies, including 3M, Amgen and Genentech.

Dr. Sauder has written hundreds of articles and clinical reviews, and gives frequent lectures on a wide variety of topics related to dermatology. He is Editor-in-Chief of the Journal of Cutaneous Medicine and Surgery, and has served on the editorial board of several major medical publications.

Marion Mac Magruder Advisory Board Member

Marion Mac Magruder is a longtime Phoenix-area entrepreneur and a respected community leader. He became the youngest McDonald’s franchisee in the world when he opened his first restaurant in 1964 at age 23. He went on to open several more McDonald’s restaurants and served on local, regional and national Boards for the company.

Beyond his success in business, Magruder has been involved in many charitable and fundraising organizations, including the Ronald McDonald House, Crisis Pregnancy Centers, United Way and many more. He serves as Treasurer of the Barrow Neurological Institute Board, where he sees both the challenges faced by medical professionals today, and the ways technology is solving the problems faced by healthcare providers.

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