OUR PHYSICIANS

Experienced, Professional, Board-Certified Family Physicians

Our Physicans

EHS physicians are committed to going above and beyond for our clients. We actively work to make your life healthier and give you the peace of mind you deserve. Our exclusive doctor-client ratio allows our award-winning physicians to provide a level of personalized service and care that simply isn’t attainable elsewhere.

Each physician takes a total care management approach that is centered on customization, convenience and total health assurance for every client. Both medicine and concierge care require continuous efforts to understand what is best. EHS physicians continuously train and refine their skills and processes to optimize the client experience and service. Our doctors are committed to you, your health and your experience.

Meet Our Physicians

Dr V

A graduate of Langley High School, Virginia Tech and the University of Virginia School of Medicine, Dr Vasiliadis is a co-founder of EHS. He is board certified in Family Practice and has been practicing adult and pediatric medicine in the Northern Virginia area since 1994. Since 2003, he has been honored by selection to the list of our area’s “Best Doctors” by both the Washingtonian and Virginia Business magazines.

Mark E. Vasiliadis M.D.

Learn More About Dr. Vasiliadis

Dr. Vasiliadis is a graduate of Langley High School, Virginia Tech and the University of Virginia School of Medicine. He completed his Family Practice residency training at Franklin Square Hospital in Baltimore, Maryland. He is board certified in Family Practice and has been practicing adult and pediatric medicine in the Northern Virginia area since 1994. Since 2003, he has been honored by selection to the list of our area’s “Best Doctors” by both the Washingtonian and Virginia Business magazines.

Dr. Vasiliadis tutors medical students from Georgetown University Medical School and the George Washington School of medicine, where he is an Assistant Clinical Instructor. He has served on both the Fairfax County Medical Society and the Reston Hospital Medical Care Review committees. He has enjoyed his role as ‘Team Physician’ for multiple youth sports’ programs. His special interests include sports medicine, exercise science and pediatrics. However, he enjoys caring for the entire family.

Dr. Vasiliadis married Lynne Epperly from Fairfax, Virginia in 1989. They have two adult children and reside in Great Falls, Virginia. His passions include golf, poker and training his Goldendoodle puppy, Bella.

Dr. K

Co-Founder of Executive Healthcare services, Dr Kelleher has been ranked by his peers as a Washingtonian Magazine’s “Top Doctor” for multiple years, as well as having been selected by Washington Consumer’s Checkbook, nationally by the Best Doctors company, and internationally by Castle Connelly continuously since 2009 as a top Primary Care Physician.

Kevin J. Kelleher, M.D.

Learn More About Dr. Kelleher

Originally from Buffalo, New York, Dr. Kelleher is a board-certified Family Physician who has practiced in the Northern Virginia area since 1996. Dr. Kelleher received his Medical Degree from the State University of New York at Buffalo and completed his residency at Franklin Square Hospital in Baltimore where he served as Chief Resident.

Dr. Kelleher has been ranked by his peers as a Washingtonian Magazine’s “Top Doctor” for multiple years, as well as having been selected by Washington Consumer’s Checkbook, nationally by the Best Doctors company, and internationally by Castle Connelly continuously since 2009 as a top Primary Care Physician.

Since 2008 he has worked with medical students as an Assistant Clinical Instructor for GWU Department of Medicine. He has served on the Reston Hospital’s Infectious Disease committee and has served as a member of the local county school system’s Family Life Education Curriculum Advisory Committee. He has spoken locally and nationally on subjects including migraine management, smoking cessation and health information technology, with a focus on personalized apps and wearables to better improve health care reform. He serves as the Medical Director for eDoc4u, an online Health Risk Assessment company, and has been the Medical Director of the award-winning Nurse Advocacy Program at SRA International.

He has special interests in Sports Medicine, migraine headache, Adolescent Medicine, smoking cessation and health information technology, with a focus on personalized apps and wearables to better improve health. His hobbies include the Sciences and American history. He enjoys all sports, especially golf, volleyball and football. He lives in Reston, Virginia with his wife, Karen, and their son, Brayden.

Dr. M

Educated at Princeton, Duke and Yale, his clinical skills have earned him many teaching and clinical honors through the years. He has been honored with many teaching and clinical awards through the years, including the Vitals Patients’ Choice Awards yearly from 2008-14, and Most Compassionate Doctor recognition from 2012-2014, and he was named a Washington, DC-Baltimore-Northern Virginia Super Doctor yearly from 2011-13.

Dale A. Matthews, M.D., F.A.C.P.

Learn More About Dr. Matthews

Dr. Matthews is a board-certified specialist in general internal medicine caring for adult patients. After graduating cum laude from Princeton University, he received his medical degree from Duke University School of Medicine, followed by an internship and residency in internal medicine at the University of Connecticut School of Medicine and a fellowship in internal medicine at Yale University School of Medicine. He has served on the faculty in general internal medicine at three medical schools: Yale University, University of Connecticut and Georgetown University.

Dr. Matthews has authored books, documentaries and over 60 peer-reviewed scientific publications largely focused on his research on the doctor-patient relationship and the psychological and spiritual dimensions of medicine. His writings have been featured in numerous national newspapers and magazines including the New York Times Sunday Magazine, Washington Post Magazine, USA Today Weekend, Christian Science Monitor, Newsweek, Reader’s Digest and Prevention and led to numerous national television appearances including the Oprah Winfrey Show, Larry King Live, Good morning America and Fox Evening News.

He has been honored with many teaching and clinical awards through the years, including the Vitals Patients’ Choice Awards yearly from 2008-14, and Most Compassionate Doctor recognition from 2012-2014, and he was named a Washington, DC-Baltimore-Northern Virginia Super Doctor yearly from 2011-13.

Dr. Matthews lives in McLean, VA with his wife Demetra, a certified public accountant. He has two adult children. He enjoys family and church activities, Bible study and teaching, golf, baseball, piano, singing, songwriting, ballroom dancing, travel and photography.

DR B

Dr. Bosch graduated from the University of Virginia as an Echols scholar and from medical school at UVA on a full U.S. Air Force scholarship. Eventually moving from his role in the Air Force as Chief of Flight Medicine at the Pentagon, he joined George Washington University, eventually founding their Executive Health Center, where he was the personal physician and health advisor for the Vice President, many cabinet leaders, celebrities, local CEOs and international dignitaries. He has been recognized as a “Top Doctor” by the Washingtonian in addition to recognition for his work in Health IT.

Ryan G. Bosch, M.D., F.A.C.P., MBA

Learn More About Dr. Bosch

Dr. Bosch graduated from the University of Virginia as an Echols scholar. He completed his medical school training at the top of his class at UVA on a full U.S. Air Force scholarship. After completing a residency in internal medicine and a fellowship in aerospace medicine in the USAF, Dr. Bosch served in the Air Force as a highly decorated physician officer, and ultimately became the Chief of Flight Medicine at the Pentagon. In this capacity, Dr. Bosch was the personal physician to the Secretary of Defense, Chairman of the Joint Chiefs of Staff and Secretary of the Air Force. Upon separating from the USAF, Dr. Bosch joined the George Washington University (GWU) MFA academic practice and took on the leadership of their 30-physician internal medicine division. As Director of General Medicine, Dr. Bosch founded their Executive Health Center, developed their teaching curriculum and became a physician leader on the White House Medical Team. Dr. Bosch has been the personal physician and health advisor for the Vice President, many cabinet leaders, celebrities, local CEOs and international dignitaries.

In addition to being board-certified in internal medicine, Dr. Bosch holds an MBA in health care informatics from GWU School of Business. Notable personal accolades include authoring the HIMSS national article of the year in The Journal of Healthcare Information Management for his rapid implementation methodology. For his innovative clinical work in technology, Dr. Bosch was named one of three “Microsoft Clinicians of the Year.” Dr. Bosch was also honored locally as a “Best Doctor” by the Washingtonian magazine. Dr. Bosch’s current clinical practice panel is closed to his current patients only at this time. Dr. Bosch has special medical interests in preventive care, clinical informatics, sports medicine and nutrition. He lives in McLean with his wife and two children. Dr. Bosch’s favorite past time is coaching his kids’ sports and playing basketball.

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