Although our members are scattered across the globe, our WorldClinic physician team operates like a conventional private medical practice. Each physician has a unique background and areas of special interest but all hold our core values of accountability, personal service, and clear personable communication. All of the WorldClinic physicians are board certified in their specialties, and are affiliated with leading medical centers across the United States.

When you join WorldClinic, you will be assigned an individual physician. This physician is responsible for both your (and your families) health and personal satisfaction. If your schedule permits, your WorldClinic physician will visit you in person to introduce themselves and answer your questions. From that moment forward, the physician team at WorldClinic is on call to you as your own personal medical resource.

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  Dr. Dan Carlin
  Daniel Carlin M.D. established WorldClinic in 1998. Drawing on years of experience as a medical officer in the US Navy and later as an expatriate volunteer, he designed WorldClinic to meet the needs of people whose work and lifestyle frequently took them out of contact with modern medical care. Since then, he has become a recognized leader in using the Internet and telecommunications to deliver quality medicine.
  In 1985, he obtained his M.D. from Tufts University School of Medicine, after receiving a bachelors degree in Chemistry and Philosophy from Carnegie-Mellon University. He is board certified in Emergency Medicine and holds a staff appointment at the Lahey Clinic in suburban Boston.
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  Dr. Paul Heinzelmann
  Paul Heinzelmann M.D., M.P.H. is a career family physician and technologist. A graduate of the fellowship in Telemedicine at Massachusetts General Hospital, Dr. Heinzelmann's work has centered on providing expert medical opinion and consultations to remote and underserved areas of the world including Cambodia and the Democratic Republic of the Congo.
  A 1996 graduate of the University of Wisconsin School of Medicine, he earned a bachelors degree in biology from the same institution and completed his residency there in 2000 . He also recently earned a Master of Public Health at the Harvard School of Public Health and a Diploma in Tropical Medicine and Hygiene from the Royal College of Physicians - London. He is board certified in Family Practice and holds a staff position at Massachusetts General Hospital where he continues to do research in telemedicine and medical technologies.
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  Dr. Christopher Sidford
  Highly regarded by peers and patients alike, Dr. Christopher Sidford is a board-certified physician in Emergency Medicine with over twenty years' experience at leading medical institutions. Before joining WorldClinic, he was an attending physician with the world-renown Lahey Clinic. He started his career at Boston City Hospital, where he graduated from the hospital's "knife and gun club," the residency program for emergency physicians.

  A U.S. Navy officer, Dr. Sidford served as faculty member of the Emergency Medicine Residency training program in San Diego before traveling overseas. The Mojave Desert and the Arctic Circle were just some of the locations that challenged Dr. Sidford to teach and practice emergency medicine in remote and difficult conditions. Later, he helped to open a nuclear-, chemical-, and biological-proof hospital on the island of Sicily.

  Upon returning to the United States, he joined the faculty at Brown University, where he taught emergency medicine and served as attending physician at Rhode Island Hospital and Hasbro Children's Hospital.

  He is a fellow with the American College of Emergency Medicine, and volunteers at IMEC (International Medical Equipment Collaborative), an organization dedicated to providing third-world nations with millions of dollars' worth of used medical equipment.

  Dr. Sidford received his bachelor's degree in Chemistry from St. Lawrence University in 1982, and his medical degree from Albany Medical College in 1987.

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  Dr. Tatiana Hamawi
  Tatiana Hamawi M.D. is board certified in both internal medicine and pediatrics. In the context of her regular practice, she cares for both infants and octogenarians, commanding an unusually large breadth of medical knowledge across all ages. Her many other professional interests include web page design for doctors and novel ways of using e-mail and the Internet to communicate with her patients.
  She is a 1994 graduate of the Mount Sinai School of Medicine and completed her residency training in pediatrics and internal medicine at the University of Massachusetts in 1998. She holds a Bachelor of Science degree in Microbiology from the University of Massachusetts.
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  Dr. Michael Jacobs
  Michael Jacobs M.D. is an experienced multi-specialty physician with board certification in both internal medicine and gastroenterology. As a senior attending physician at Martha's Vineyard Hospital, he has a long-standing interest in the delivery of medical care to islands and remote stations. He is also a well-recognized author of numerous articles and books on marine and maritime medical care.
  Dr. Jacobs graduated from medical school at S.U.N.Y. Downstate Medical Center in 1967. In the course of his career he has held clinical positions at the National Institutes of Health (Bethesda, MD), Columbia-Presbyterian hospital (New York, NY) and Beth Israel Hospital (Boston, MA).
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  Dr. Kevin O'Toole
  Kevin O'Toole M.D. is a board certified emergency physician with an extensive range of practice experience including time spent as a cruise ship physician and later as a physician crewmember of a helicopter medical rescue team. He is a recognized field leader in the area of Dive Medicine and Hyperbaric Therapy. As a member of the WorldClinic medical staff, his expertise is often brought to bear in medical planning and short-term physician staffing of special events in remote locations.
  Dr. O'Toole is a 1979 graduate of Pennsylvania State University. He completed medical school (1983) and his residency training at the University of Pittsburgh in 1986.
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  Dr. Karen McKoy
  Karen McKoy M.D. is a medical dermatologist on the Lahey Clinic Senior Staff and affiliated with Harvard and Tufts Medical Schools since 1980. She is board certified in internal medicine and dermatology with her medical training at the University of Alabama and Yale, and her dermatology training at Harvard. She has also done post-graduate training in medical informatics through the National Library of Medicine fellowship at the Marine Biological Institute and has recently earned a Master of Public Health in International Health at the Harvard School of Public Health. Other recent work includes serving as a research consultant for the Ehealth working group of the Canadian National Research Council's Institute for Information Technology. She has also served as a medical director for Logical Images in Rochester, NY and continues to work at Lahey Clinic in Burlington, MA. Her international volunteer work has focused on dermatology education and teledermatology work with the International Society of Teledermatology.