The Medical Opinion Marketplace

Clayton C. Bettin, MD, is an orthopaedic surgeon specializing in foot and ankle surgery at Campbell Clinic Orthopaedics in Memphis, Tennessee. He serves as Division Chief of Hospital Orthopedics and holds an academic appointment as an Assistant Professor with the University of Tennessee Health Science Center–Campbell Clinic Department of Orthopaedic Surgery. Dr. Bettin also provides educational leadership as Foot & Ankle Fellowship Director. Dr. Bettin completed his undergraduate education at The Ohio State University and earned his medical degree from The Ohio State University College of Medicine and Public Health. He then completed orthopaedic surgery residency training through the University of Tennessee–Campbell Clinic program, followed by advanced fellowship training in foot and ankle surgery at the University of Utah. Board certified by the American Board of Orthopaedic Surgery, Dr. Bettin is committed to delivering comprehensive, evidence-based care for a wide range of foot and ankle conditions. His clinical and academic interests include complex reconstructive problems, including Charcot neuropathy of the foot and ankle. He is an active member of professional organizations including the American Orthopaedic Foot & Ankle Society, the American Academy of Orthopaedic Surgeons, and the Tennessee Orthopaedic Society.

Dr. James D. Eason, MD, is a transplant surgery physician with more than 40 years of experience caring for patients with complex liver and kidney disease. His clinical focus includes liver transplantation, kidney transplantation for adults and children, and hepatobiliary surgery, including complex liver and biliary procedures. Based in Memphis, he is associated with Methodist University Hospital and Le Bonheur Children’s Hospital, where he has contributed to multidisciplinary transplant care. Dr. Eason has been recognized in local physician listings, including being named among “Top Doctors” in a regional publication. He is also a published contributor to peer-reviewed transplant surgery research and has participated as a co-author on scholarly work addressing outcomes and best practices in the field. In addition to his clinical and academic roles, Dr. Eason has been publicly described as a leader of a transplant program at Methodist University Hospital that carried the name the James D. Eason Transplant Institute. He is also listed with an additional practice location in Florida, reflecting a broader regional presence in transplant care.

Jack Tsao, MD, DPhil, is a physician specializing in Behavioral Neurology and Neuropsychiatry, with expertise in the evaluation and management of cognitive and behavioral symptoms related to neurologic disease. He is board certified in Neurology by the American Board of Psychiatry & Neurology. Dr. Tsao earned his medical degree from Harvard Medical School through the Harvard–MIT Health Sciences & Technology program and completed doctoral training at the University of Oxford. He completed neurology residency training at the University of California, San Francisco, followed by a clinical fellowship in geriatric behavioral neurology at the University of Florida. In addition to his clinical work, Dr. Tsao serves as Professor of Neurology at Rutgers New Jersey Medical School and is Director of the Center for Memory and Brain Health. His prior academic roles have included professorships in neurology, pediatrics, and anatomy and neurobiology at the University of Tennessee Health Science Center, as well as leadership positions at the Memphis VA Medical Center, including Chief of Neurology and Director of a Polytrauma/OIF/OEF Clinic. He has also held an adjunct faculty appointment in neurology at NYU Grossman School of Medicine. Dr. Tsao is a Fellow of the American Academy of Neurology and the American Neurological Association, and he has served as a U.S. Navy Reserve officer (Captain). His research interests include clinical applications of artificial intelligence, effects of blast exposure and concussion, and therapies for phantom limb pain.

Jyothishree Pinnaka, M.D., is a physician specializing in internal medicine and nephrology, providing comprehensive kidney care for adults. She is affiliated with Memphis Nephrology Associates and Saint Francis Hospital in Memphis. Dr. Pinnaka’s clinical focus includes the evaluation and management of chronic kidney disease, dialysis care, and transplant-related nephrology, with an emphasis on coordinating care for patients with complex medical needs. Dr. Pinnaka completed fellowship training in Nephrology at Emory University School of Medicine and additional fellowship training in Transplant Nephrology at the University of Tennessee. She is board certified by the American Board of Internal Medicine in both Internal Medicine and Nephrology. Dr. Pinnaka is also a Fellow of the Society of Hospital Medicine (FHM), reflecting a commitment to quality and excellence in the care of hospitalized patients. She is licensed to practice medicine in Tennessee and Massachusetts and provides care in English. Dr. Pinnaka is dedicated to patient-centered care, partnering with individuals and families to support kidney health through thoughtful diagnosis, evidence-based treatment, and long-term disease management.

William Fulliton, PhD, is a behavior analyst and clinical psychologist based in Memphis, Tennessee. He is the founder and President/Director of Behavioral Science Consulting, where he provides behavioral health assessment, consultation, and related psychological services. Dr. Fulliton’s work spans clinical, organizational, and forensic settings, and he is frequently called upon to provide expert-witness testimony in matters involving clinical psychology. His professional background includes service on staff at Baptist Memorial Hospital as well as experience as a police psychologist for the City of Memphis, contributing specialized expertise in high-stakes environments. He also consults with behavioral health facilities, including Lakeside Behavioral Health, Crestwyn Behavioral Health, and Delta Specialty Hospital. Dr. Fulliton earned his PhD from the University of Memphis, following graduate study at Stephen F. Austin State University and undergraduate education at Biola University. He maintains an academic affiliation with the University of Memphis, supporting internship opportunities and providing supervision for doctoral students in clinical psychology. Licensed in Tennessee and also licensed in Minnesota, Dr. Fulliton is recognized for providing services across multiple states.

Ronald Carlton Staples, DDS, F.A.C.S., is an oral and maxillofacial surgeon providing comprehensive surgical care for conditions affecting the mouth, jaws, and face. He earned a B.S. in Engineering Science from the University of Tennessee, Knoxville, with a biomedical engineering major and a mathematics minor, graduating with honors. He completed his Doctor of Dental Surgery degree at the University of Tennessee Health Science Center College of Dentistry, followed by advanced training in oral and maxillofacial surgery through an externship, postdoctoral fellowship, and residency. Dr. Staples is board certified by the American Board of Oral and Maxillofacial Surgery and the National Board of Dental Anesthesiology. In addition to his clinical practice, he serves as an Assistant Professor in the Department of Oral and Maxillofacial Surgery at the University of Tennessee Health Science Center. He holds hospital appointments across the region, including staff roles at Methodist and Baptist Memorial hospitals, with additional affiliations at Le Bonheur Children’s Hospital and Regional Medical Center. Dr. Staples has also contributed to the specialty through professional leadership in dental and oral surgery organizations and is named on a U.S. patent related to orthognathic surgery simulation instrumentation. His clinical focus commonly includes procedures such as wisdom teeth removal and dental implant surgery.

Bruce W. Randolph, MD, is an occupational medicine physician with training and experience spanning clinical care, workforce health, and public health leadership. He earned a BS in Biology from Tuskegee University, an MD from the University of Florida College of Medicine, and an MPH from the Johns Hopkins University School of Public Health. Dr. Randolph completed residency training in Family Medicine, General Preventive Medicine, and Occupational Medicine, supporting a broad, prevention-focused approach to patient and population health. Dr. Randolph has served in academic and community settings, including prior work as an assistant professor in family and preventive medicine. He has also held leadership roles in correctional health, supporting medical oversight and health compliance initiatives. In addition to clinical practice, he founded Randolph Occupational Medicine Services, providing occupational health services such as workers’ compensation-related care, disability and impairment evaluation, and preventive health programs. A proponent of “Total Wellness,” Dr. Randolph emphasizes practical strategies that integrate physical health, mental well-being, and lifestyle change. He has served as a health officer for a major metropolitan health department and currently contributes to public health innovation and training as Co-Director of PH-IDEAS at the University of Memphis School of Public Health.

Rande H. Lazar, MD, is an otolaryngology physician with fellowship training in Pediatric Otolaryngology (Pediatric ENT) and experience caring for both pediatric and adult ear, nose, and throat conditions. He earned his medical degree from Universidad Autónoma de Guadalajara in Mexico and completed otolaryngology residency training at the Cleveland Clinic Foundation, where he served as Chief Resident. His postgraduate training also includes New York Medical College and surgical residency training within the Cornell–North Shore University Hospital System. Dr. Lazar completed advanced fellowship training in pediatric otolaryngology at the Armed Forces Institute of Pathology/Walter Reed Army Medical Center and at Le Bonheur Children’s Medical Center in Memphis. Dr. Lazar serves as Director of the Pediatric Otolaryngology Fellowship Training Program associated with ENT Memphis at Le Bonheur Children’s Medical Center. His clinical interests include complex pediatric airway and sinus disease, with noted experience in pediatric upper airway reconstruction procedures and laser techniques for airway surgery, as well as early adoption of pediatric endonasal sinus surgery. He has authored more than 40 peer-reviewed publications and is recognized as a national and international speaker on pediatric otolaryngology as well as adult sinus surgery, sinusitis, and sleep apnea.

Pedro A. Velasquez, MD, is a physician specializing in internal medicine with a subspecialty focus in endocrinology, diabetes, and metabolism. He provides comprehensive care for patients with complex endocrine and cardiometabolic needs, with particular emphasis on evidence-based diabetes management and long-term risk reduction. Dr. Velasquez integrates medical therapy with practical lifestyle strategies to support sustainable improvements in health and quality of life. In addition to clinical practice, Dr. Velasquez has contributed to the medical literature as an author on peer-reviewed work addressing diabetes care and lifestyle-medicine approaches. His academic background includes faculty and assistant professor roles at the University of Tennessee Health Science Center, reflecting a commitment to advancing education and clinical research in endocrinology and related fields. Dr. Velasquez is known for a patient-centered approach that values clear communication, individualized treatment planning, and collaborative decision-making. He is also able to provide care in Spanish, helping serve the needs of diverse patient populations.

Fereidoon Parsioon, MD, is a physician specializing in neurological surgery in Memphis, Tennessee. He provides comprehensive neurosurgical care with a focus on the evaluation and treatment of disorders affecting the brain, spine, and peripheral nerves. Dr. Parsioon is affiliated with Saint Francis Hospital and also has affiliations with Baptist Memorial Hospital and Saint Francis Bartlett Medical Center, supporting continuity of care across a range of inpatient and outpatient settings. He is associated with Phoenix Neurosurgery, PLLC, where he collaborates with clinical teams to develop individualized treatment plans that prioritize patient safety, clear communication, and evidence-based decision-making. Dr. Parsioon is listed in the AMA Find a Doctor directory under neurological surgery. He is enrolled in Medicare’s PECOS system and is eligible to order and refer services for Medicare patients. Dr. Parsioon speaks English and is committed to helping patients and families understand their diagnosis and treatment options, whether care involves surgical intervention or coordinated nonsurgical management.