Our team

James Boyd, MD, Orthopedic Surgery

Dr. Boyd is a board-certified orthopedic surgeon. He completed fellowship training in sports medicine with Scripps Health in San Diego where he treated several athletes with the Padres baseball team and Chargers football team as well as many recreational athletes. He takes great satisfaction in caring for professional and recreational athletes of all ages. Dr. Boyd earned his medical degree and completed his orthopedic residency at Loma Linda University School of Medicine. He also served four years in the United States Navy, practicing general orthopedics at the Robert E. Bush Naval Hospital in Twentynine Palms, California. He has been practicing in Sonora since 2011.

Christopher Krpan, DO, Orthopedic Surgery

Dr. Krpan is a board-certified orthopedic surgeon and has been practicing in the Mother Lode since 2004. He graduated from University of California Santa Barbara and earned a Doctor of Osteopathic Medicine degree from Western University Medical School. He completed his residency at Meirdia South Pointe Hospital which is part of the Cleveland Clinic Health System in Cleveland, Ohio. Dr. Krpan specializes in fracture care, total joint replacement surgery, partial knee replacement, sports medicine and other orthopedic issues of the extremities.

Thomas McDonald, MD, Orthopedic Surgery

Dr. McDonald is a board-certified, fellowship-trained orthopedic surgeon and has been providing patient care in Sonora since 2011. He completed a five-year residency in orthopedic surgery at the University of California Davis Medical Center, a level I trauma center. Following his residency, he joined the Department of Orthopedics at Kaiser Permanente in Sacramento, a level II trauma center. Dr. McDonald also has unique training from his fellowship with The Indiana Hand Center in Indianapolis, where his training included diagnosis, surgical treatment, and rehabilitation of injuries and disorders of the entire upper extremity.

John Nelligan, MD, Orthopedic Surgery

Dr. Nelligan earned his medical degree from Rush Medical College in Chicago, Illinois, and completed his residency in orthopedic surgery at Stanford University Medical Center in Palo Alto, California. He then went into private practice, serving at both Stanford University Medical Center and Sequoia Hospital in Redwood City for over 20 years. He also served as medical director and staff surgeon for the total joint program at St. John’s Medical Center in Longview, Washington, before moving to Sonora in 2012. "It is important to offer each patient a full-spectrum of care, which includes non-surgical measures," Dr. Nelligan explains. "We work with each patient to bring him or her functional restoration and pain relief using the least invasive treatment option that is likely to work.”

Michael Nuzzo, MD, Orthopedic Surgery

Dr. Nuzzo is board-certified in orthopedic surgery and fellowship trained in sports medicine. He cares for athletes at all levels of accomplishment and all stages of life. He specializes in minimally invasive arthroscopic procedures to treat injuries of the hip, shoulder, knee and ankle. He takes a team approach, working with physical therapists, coaches and trainers to get patients back to the activities they love. A veteran of the U.S. Army, Dr. Nuzzo was deployed in Iraq in support of Operation Enduring Freedom, serving as the orthopedic trauma consultant for Iraq Joint Operations, and was awarded the Meritorious Service Medal. Dr. Nuzzo has brought many years of experience to the orthopedic team in Sonora, which he joined in 2022.

Hannah Row, MD, Physical Medicine and Rehabilitation

Dr. Row is a highly experienced physiatrist who cares for patients at the Specialty Care medical office in Angels Camp and at Health Pavilion Primary Care and Rural Health Specialty Medical Offices in Sonora. She is vastly skilled in treating adults experiencing low back, neck and knee pain. Dr. Row is board-certified in physical medicine and rehabilitation with extensive experience in treating spondylosis, herniated discs and knee osteoarthritis. When asked about what drew her to practice physiatry she says, “I love helping patients get back to living a healthy and active lifestyle.”

Adventist Health Sonora also offers renowned spine care, including cutting-edge treatments for a full range of conditions. The Northern California Spine Institute is a region leader in comprehensive care for the spine.