Dr. Raja has performed more than 3,500 surgeries throughout his career, including 2000 thoracic surgeries. Since 2013, he performed around 100 laparoscopic heller myotomies or POEM procedures to treat patients with achalasia. Dr. Raja has performed more than 1100 surgeries since his Cleveland Clinic appointment in 2012. He specializes in esophageal surgeries including Laparoscopic Heller Myotomy, POEM which is an incision-less technique to treat achalasia. His specialty interests include achalasia, esophageal cancer, lung cancer, hiatal hernia, cancers and tumors of the chest and chest wall, minimally invasive and endoscopic surgery, and general thoracic surgery.