Mark L. Messmer, NP

Throughout my medical career, I have remained dedicated to improving my patients' quality of life. As a specialist in adult cervical and spinal deformity surgery, I understand the significant impact our interventions have on individuals suffering from debilitating pain and physical and mental health challenges. Spinal deformity surgery merges the complexities of spinal biomechanics with the needs of an aging population. My research focuses on spinal alignment, biomechanics, innovative surgical techniques, and health economics to ensure value-based care that enhances patient outcomes. Dr. Passias is highly rated in 23 conditions, according to our data. His top areas of expertise are Lordosis, Kyphosis, Scoliosis, Osteotomy, and Spinal Fusion.

Evan Dellon is a Gastroenterologist in Chapel Hill, North Carolina. Dr. Dellon is highly rated in 19 conditions, according to our data. His top areas of expertise are Eosinophilic Esophagitis, Esophagitis, Eosinophilic Enteropathy, Endoscopy, and Colonoscopy.

My clinical interests include the minimally invasive management of urinary tract stones, including shock wave lithotripsy, percutaneous, and ureteroscopic stone removal. I completed my training at the University of North Carolina in 1983 and was an American Urological Association Scholar (1983-1985) in the Division of Mineral Metabolism at the University of Texas Southwestern Medical Center, Dallas. In 1993, I returned to North Carolina as professor of urological surgery and director of the Duke Comprehensive Kidney Stone Center. Dr. Preminger is highly rated in 19 conditions, according to our data. His top areas of expertise are Kidney Stones, Urinary Tract Infection (UTI), Boils, Lithotripsy, and Ureteroscopy.