Your Team

Andrew H. Segal, M.D.

Founder, CEO, and Physician-in-Chief

Andrew H. Segal, M.D. is an experienced physician who has extensive cross-specialty expertise. A graduate of Harvard College, Dr. Segal completed a combined residency in internal medicine and pediatrics, as well as a fellowship in rheumatology, at Massachusetts General Hospital, achieving certification in all three specialties. Following postdoctoral training at the prestigious Whitehead Institute, he founded and served as CEO of a biotechnology company that developed immunotherapies for cancer, chronic infectious diseases, and other disorders. In addition to serving as CEO, Dr. Segal obtained and was Principal Investigator on 7 NIH grants.

Dr. Segal has a longstanding commitment to patients who have diagnostic dilemmas and rare diseases. He is known among his peers as a “phenomenal” diagnostician and is frequently consulted when other top experts have failed. He is a generalist who can see the whole "elephant" but who has a specialist's interest in the esoteric detail. Among the many unexpected diagnoses he has made are the genetic disease ectodermal dysplasia; the rare infection actinomycosis; the autoimmune disease Cogan's syndrome; and the drug reaction neuroleptic malignant syndrome, all of which were missed at leading academic medical centers.

John H. Klippel, M.D.

Chief Medical Officer

Throughout his career, Dr. Klippel has been one of the world's true physician-leaders in a variety of capacities. From 2003 until his retirement in 2013, he was worldwide President and CEO of the Arthritis Foundation, having served as its Medical Director beginning in 1999. Prior to that, he was Clinical Director of the NIH's National Institute of Arthritis and Musculoskeletal and Skin Diseases for 12 years. At the NIH, Dr. Klippel pioneered the treatment of lupus kidney disease. He has also served as Scientific Director of the Alliance for Lupus Research, a partnership between the Arthritis Foundation and the Robert Wood Johnson family, and as Visiting Professor at Johns Hopkins. Among his many honors are Mastership in the American College of Rheumatology; the Surgeon General's Exemplary Service Award; the NIH Director's Award; the NIH Distinguished Clinical Teacher Award; and the Burroughs-Wellcome Visiting Professor Award from London's Royal Society of Medicine. Dr. Klippel is the Founding Editor of the landmark textbook "Rheumatology" and the longtime Editor-in-Chief of the classic reference "Primer on the Rheumatic Diseases". He completed his residency in internal medicine at Yale New Haven Hospital and his rheumatology fellowship at the University of California San Diego.

Cornelius F. Boerkoel, M.D., Ph.D.

Director of Molecular Medicine

Dr. Boerkoel brings more than 30 years of research and clinical expertise to this role. He has extensive experience evaluating undiagnosed patients, both clinically and through standard and innovative laboratory investigations. He directed the translational laboratory of the National Institutes of Health Undiagnosed Diseases Program for 5 years, from its inception, and was instrumental in shaping that innovative program. Dr. Boerkoel has taken 3 different rare diseases from evaluation of a single patient through early-stage drug development. He received his M.D. and Ph.D. from Case Western Reserve University and trained in pediatrics at the University of Washington and in clinical genetics at the University of Toronto. He entered clinical practice in genetics and completed postdoctoral training at Baylor College of Medicine before joining the faculty of the University of British Columbia in 2006. Dr. Boerkoel is also a co-founder of the Rare Disease Foundation.

Senior Physicians

Focus Diagnostic Medicine is recruiting outstanding diagnostic internists to join its team, which will work together, under one roof, to serve patients from around the globe who present with challenging cases. For information on professional opportunities for M.D.'s, click here.

Independent Advisory Board

S. Wright Caughman, M.D., Ph.D.

Executive Vice President for Health Affairs, Emeritus, Emory University

Served as Emory’s Executive Vice President for Health Affairs, CEO of the Woodruff Health Sciences Center (WHSC), and Chairman of the Board for Emory Healthcare, Georgia’s largest comprehensive health care system. The WHSC consists of Emory University’s School of Medicine, the Nell Hodgson Woodruff School of Nursing and the Rollins School of Public Health; the Yerkes National Primate Research Center; Winship Cancer Institute; and Emory Healthcare. Also served as director of The Emory Clinic, Executive Associate Dean for Clinical Affairs in the School of Medicine, and Vice President for Clinical and Academic Integration in the WHSC and as a staff physician at The Emory Clinic, Grady Memorial Hospital and the Atlanta Veterans Affairs Medical Center. Completed his residency in dermatology at Harvard Medical School and joined the Emory School of Medicine faculty in 1990 after serving in the dermatology branch of the National Cancer Institute. Led a successful research program in cutaneous biology for many years and was one of two co-chairs of the Emory School of Medicine research strategic plans in 1997 and 2003. Served as Chair and Alicia Leizman Stonecipher Professor of Emory's Department of Dermatology from 1997 to 2007.

Gary S. Hoffman, M.D.

Professor of Medicine, Cleveland Clinic Lerner College of Medicine

From 1992 to 2008 served as Chairman of the Department of Rheumatic and Immunologic Diseases at the Cleveland Clinic, and during that tenure was honored with the Harold C. Schott Chair. Pioneer in the area of inflammatory and autoimmune diseases, particularly vasculitis. Founder of the Cleveland Clinic Center for Vasculitis Care and Research, and the founder and past Chairman of the International Network for the Study of the Systemic Vasculitides. Prior to joining the Cleveland Clinic, was Head of Vasculitis and Related Diseases at the National Institute of Allergy and Infectious Diseases of the National Institutes of Health. Master of the American College of Rheumatology and recipient of the ACR Distinguished Clinical Investigator Award, the NIH Director's Award, the NIAID Director's Award, and many others. Has served on the Boards of numerous non-profit organizations. Author of over 300 articles and chapters and editor of 4 books, including the comprehensive textbook Inflammatory Diseases of Blood Vessels.

Donald W. Landry, M.D., Ph.D.

Chairman of the Department of Medicine, Samuel Bard Professor, and Chief of the Division of Experimental Therapeutics at Columbia University’s College of Physicians and Surgeons

Physician-in-Chief at New York Presbyterian Hospital/Columbia. Previously Chief of the Division of Nephrology at P&S.  Eclectic innovator whose work cuts across drug discovery, medicinal chemistry, protein engineering, neuroendocrine physiology, nephrology, cardiology, toxicology, and a number of other fields. Recognized around the world as a visionary physician-leader. 

Michael V. Seiden, M.D., Ph.D.

Chief Medical Officer, McKesson Specialty Health and U.S. Oncology, Houston, TX

Internationally recognized expert in general and gynecologic oncology. Previously Chief Executive Officer of the world-renowned Fox Chase Cancer Center in Philadelphia. Held several key positions at Harvard Medical School and Massachusetts General Hospital.

Thomas R. Spitzer, M.D.

Professor of Medicine, Harvard Medical School

Chief of the Walter Bauer firm, Department of Medicine, Massachusetts General Hospital. Director of Bone Marrow Transplantation, Massachusetts General Hospital. Expert hematologist and pioneer in transplant medicine and immunology.

Arnold N. Weinberg, M.D.

Professor of Medicine, Harvard Medical School and Senior Physician, Massachusetts General Hospital

In Memoriam

At Massachusetts General Hospital, was Vice Chair of Medicine, served as an associate Firm Chief, and, for over 4 decades, has taught and consulted in infectious diseases and general medicine. Served as Medical Director at Massachusetts Institute of Technology, has consulted extensively at MIT's Lincoln Laboratory, and was a longstanding member of the Board of Directors at the Whitehead Institute for Biomedical Research. Had broad expertise in infectious diseases with a particular interest in the zoonoses, diseases transmitted from animals to humans. Presented Grand Rounds on zoonoses at the NIH as part of the Clinical Center's "Great Teachers" program.