Meet Our Physicians

Several physicians are associated with the Sports Medicine program.

Joseph Donnelly, MD

Joseph Donnelly, MD

Dr. Donnelly is a native of San Francisco. After obtaining his bachelor's degree in biology from Santa Clara University, he received his medical degree from Saint Louis University School of Medicine in Missouri. He then completed a surgical internship and residency in orthopedic surgery at St. Mary's Medical Center in San Francisco.

Dr. Donnelly is a diplomate of the American Board of Orthopaedic Surgery with added subspecialty board certification in orthopedic sports medicine. He is a fellow of the American Academy of Orthopaedic Surgeons and a member of the California Orthopaedic Association.

As a board-certified orthopedic surgeon, Dr. Donnelly's practice is focused on sports medicine, joint replacement surgery and orthopedic trauma. He has a special interest and expertise in arthroscopic surgery of the shoulder and knee. His research experience includes work in pain control after ACL reconstruction surgery, the treatment of hip replacement dislocations and microvascular surgery for limb replantation. He continually strives to offer his patients the most current treatment options, including minimally invasive and tissue sparing surgery.

Dr. Donnelly is the team physician for Livermore High School and is a director of the ValleyCare Sports Medicine program. When not practicing medicine he enjoys time with his wife and four young children

Stephen Viess, MD

Stephen Viess, MD

Dr. Viess is a board-certified orthopedic surgeon, with fellowship training in sports medicine and arthroscopic surgery.

Dr. Viess is a native of San Mateo. After earning his bachelor's degree from Duke University, he received his medical degree from Chicago Medical School, where he was elected to the Alpha Omega Alpha honor society. He then completed two years of a general surgery residency at the University of California, San Francisco, before completing his orthopedic residency at St. Mary's Medical Center in San Francisco. After residency, Dr. Viess added to his training with a fellowship in sports medicine at the Lake Tahoe Orthopaedic Institute.

Dr. Viess is a diplomate of the American Board of Orthopaedic Surgery, as well as a fellow of the American Academy of Orthopaedic Surgeons. Since 2007 Dr. Viess has served as an orthopedic surgeon for the Oakland Athletics. He recently became a director of the ValleyCare Sports Medicine program. Dr. Viess' practice is focused on arthroscopic surgery and sports medicine, joint replacement and fracture care. His special interest is in arthroscopic reconstruction of the shoulder and knee. Dr. Viess also serves as the team physician for Granada High School.

Christy Boyd, MD

Christy Boyd, MD

Dr. Boyd is a pediatric sports medicine specialist with an extensive background in both athletics and medicine. Board-certified in pediatrics and fellowship-trained in primary care sports medicine, Dr. Boyd has a unique perspective in caring for the young athlete. She brings together her experience as an elite-level athlete with her medical training in both pediatrics and sports medicine in treating her patients.

Dr. Boyd graduated from Stanford University in 1995. During her time at Stanford, she was a sprinter and hurdler on the track and field team, serving as team captain her final two years. She completed medical school at the University of California, San Diego, followed by a pediatric residency at Children's Hospital Oakland. She then completed a primary care fellowship in sports medicine at Stanford Medical Center. During her fellowship, Dr. Boyd worked primarily with the Stanford athletes and served as a team physician for several teams.

Formerly the director of the Sports Medicine Center for Young Athletes at Children's Hospital Oakland, she currently is in private practice in the Tri-Valley area. Her practice focuses exclusively on the young athlete. She works as a consultant for the ValleyCare Sports Medicine program in the areas of injury prevention and sports performance. She has also maintained her involvement with the Stanford Sports Medicine program through event coverage and teaching.

In addition to being board-certified in pediatrics, Dr. Boyd is a member of the American Academy of Pediatrics, Council on Sports Medicine and Fitness. She is also a member of the American College of Sports Medicine, American Medical Society for Sports Medicine and National Strength and Conditioning Association.

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