Dr. Gagneja graduated from the Government Medical College, Guru Nanak Dev University in Punjab, India in 1990. He completed his internship and residency training at the Cleveland Clinic Health System affiliated hospitals in Cleveland, OH in 1997. He completed his Gastroenterology and Hepatology fellowship with State University of New York at Buffalo, NY in 2000. Afterwards, he accepted a position as Assistant Professor of Medicine at The University of Texas, M D Anderson Cancer Center in Houston, TX. He also served as co-director of GI fellowship program there. He moved to Austin in 2002 and joined Austin Gastroenterolgy, PA in 2004. He maintains his academic interest and actively participates in teaching of medical students and residents of Austin Medical Education Programs. He was chosen consultant of the year by the resident class of 2003-04.

Dr Gagneja was a lead interventional endoscopist at University of Texas M D Anderson Cancer Center. He has a special in interest in therapeutic endoscopy and newer technology in endoscopy. Dr. Gagneja has presented at many national meetings and has authored many abstracts, manuscripts and book chapters. He is a member of Travis County Medical Society, Texas Medical Association, Texas Society of Gastroenterolgy and Endoscopy, American Society of Gastrointestinal Endoscopy, American Gastroenterolgy Association and American College of Gastroenterology. Dr. Gagneja is fluent in English, Hindi, Punjabi and Urdu. Dr. Gagneja has practiced in Austin since 2002.