Ryan M. DiGiovanni, MD

Dr. Yu-Po Lee is a board-certified orthopaedic surgeon who specializes in spine surgery with a focus on adult degenerative conditions. He specializes in minimally invasive spine surgery to treat diseases such as disc herniation, spinal stenosis, scoliosis, tumors and trauma. Lee is a member of the American Academy of Orthopaedic Surgeons and North American Spine Society. He has authored over 100 chapters and articles on minimally invasive spine surgery. He is nationally recognized for his excellence in spinal surgery and patient care, and has been recognized by America’s Top Orthopedic Surgeons and is the recipient of Castle Connolly’s Top Doctors™ award and the Patients’ Choice Award. Lee earned his medical degree from the David Geffen School of Medicine at UCLA. He completed an orthopaedic residency at the Ronald Reagan UCLA Medical Center, followed by a spine fellowship at the Cleveland Clinic Foundation in Cleveland, Ohio.

Dr. Russell N. Stitzlein is a fellowship-trained UCI Health orthopaedic surgeon who specializes adult and pediatric orthopaedic oncology, bone and soft-tissue tumors as well as hip and knee replacement, . His clinical interests include treatment of malignant tumors of the bones or soft tissues (e.g., muscles, nerves, tendons, fat), including tumors that have metastasized from other primary tumor sites (e.g., lung, breast, prostate, kidney, thyroid) and limb salvage. He also treats adults with hip and knee arthritis and . Stitzlein earned his medical degree with special qualifications in biomedical research at Cleveland Clinic Lerner College of Medicine at Case Western Reserve University. He completed a residency in orthopaedic surgery at the Hospital of the University of Pennsylvania in Philadelphia, followed by a fellowship in musculoskeletal oncology at the University of Texas MD Anderson Cancer Center in Houston. Stitzlein has published several research papers and book chapters in his field. His research interests include outcomes after limb salvage surgery in orthopaedic oncology, as well as developing and using custom guides and implants for bone tumor patients.

Dr. David Donaldson is a board-certified UCI Health cardiologist who specializes in cardiac electrophysiology. His clinical interests include the treatment of atrial fibrillation, atrial flutter, supraventricular tachycardia (SVT), ventricular tachycardia and premature ventricular contractions (PVC) with medical and ablation therapy. He also manages cardiac rhythm disturbances with pacemakers, defibrillators, cardiac resynchronization therapy and implantable loop recorders. Donaldson earned his medical degree at the Sackler School of Medicine New York State/American Program of Tel Aviv University in New York. He completed a residency in internal medicine and a fellowship in cardiology at North Shore-Long Island Jewish Hospitals in New York, followed by a fellowship in cardiac electrophysiology at Massachusetts General Hospital in Boston. He has published several research papers and given national presentations in electrophysiology.