Zachary Callahan, MD
Bariatric Surgeon
Dr. Zachary Callahan
Foregut Surgery, Advanced Endoscopy, and Bariatric Surgery
CLINIC LOCATIONS
Downtown Nashville
410 42nd Ave. North | Suite 400
Nashville, TN 37209
TEL 615.329.7887 FAX 615.340.4537
Mon – Fri 7:30am – 4:00pm
HOSPITAL AFFILIATIONS
St Thomas Midtown
Centennial
VASCULAR SURGERY
Robotic Sleeve Gastrectomy
Robotic Gastric Bypass
Robotic Duodenal Switch and Single Anastomosis Duodeno–Ileal bypass (SADI)
Robotic Paraesophageal Hernia Repair
Robotic Hiatal Hernia Repair
Zenker’s, Esophageal, and Gastric PerOral Endoscopic Myotomy (POEM)
Robotic Gastric Simulator (Enterra)
Robotic Hernia Repair (Inguinal, Ventral, Incisional, Component Separation)
Robotic Cholecystectomy
Upper Endoscopy, Bravo, EndoFLIP, dilations, stents
BIO
Dr. Callahan graduated Alpha Omega Alpha from the Cincinnati College of Medicine and then joined the Jefferson Surgical Residency in Philadelphia. At Jefferson, he logged over 1,100 general surgery cases and passed both Fundamentals of Laparoscopic and Fundamentals of Endoscopic Surgery examinations. During his time there, he received seven teaching awards, was accepted to the Gold Humanism Honor Society and was selected as Administrative Chief Resident in his final year.
After residency, he matriculated to his first-choice fellowship in Minimally Invasive Surgery (MIS) to train under foregut expert Michael Ujiki at Northshore University HealthSystem in Chicago. This fellowship is one of only a few programs in the country to be accredited in four categories of MIS training including Advanced GI MIS, Bariatric, Comprehensive Flexible Endoscopy, and Foregut.
Dr. Callahan has presented research at numerous national meetings; he has more than 30 publications and over 500 citations relating to minimally invasive surgery. He is an active member of the Society of American Gastrointestinal and Endoscopic Surgeons, American Foregut Society, and the American Society for Metabolic and Bariatric Surgery.
In his spare time, Dr. Callahan enjoys staying active, traveling, and spending time with his wife Adrienne, Son “Theo,” and Bernedoodle “Carson.”
EDUCATION & TRAINING
Medical School:
University of Cincinnati
Residency:
Fellowship:
Professional Societies:
Alpha Omega Alpha
Gold Humanism
Society of American Gastrointestinal and Endoscopic Surgeons
American Foregut Society
American Society for Metabolic and Bariatric Surgery
Professional Societies:
2006-2010 Summa Cum Laude, University of New Hampshire; Durham, NH
2014 Gold Humanism Honor Society Nominee, University of Cincinnati College of Medicine, Cincinnati, OH
2014 Senior Alpha Omega Alpha (AOA) Recipient, University of Cincinnati College of Medicine, Cincinnati, OH
2015 Honor’s Day Graduation Speaker, University of Cincinnati College of Medicine, Cincinnati, OH
2016 Excellence in Teaching Award, Department of Surgery, Thomas Jefferson University, Philadelphia, PA
2017 The Philip J. Wolfson, MD Award – Excellence in Teaching, Department of Surgery, Thomas Jefferson University, Philadelphia, PA
2017 The Gibbon Teaching Award, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA
2018 The Philip J. Wolfson, MD Award – Excellence in Teaching, Department of Surgery, Thomas Jefferson University, Philadelphia, PA
2020 Gold Humanism Honor Society Inductee, Thomas Jefferson University, Philadelphia, PA
2020 The Philip J. Wolfson, MD Award – Excellence in Teaching, Department of Surgery, Thomas Jefferson University, Philadelphia, PA
2021 The Philip J. Wolfson, MD Award – Excellence in Teaching, Department of Surgery, Thomas Jefferson University, Philadelphia, PA
2021 Goracci Award—Excellence in Teaching as a Chief Surgical Resident, Department of Surgery Thomas Jefferson University, Philadelphia, PA
2022 Recognition of Excellence Award, Society of American Gastrointestinal and Endoscopic Surgeons, Denver, CO
2024 Recognition of Excellence Award, Society of American Gastrointestinal and Endoscopic Surgeons, Cleveland, OH