Gastrointestinal Surgery

GI Faculty

Gastrointestinal Surgery is a section within the Division of General Surgery of the Department of Surgery at the University of Alabama at Birmingham. Surgeons within the section specialize in both routine and complex gastrointestinal surgical problems, including both benign and malignant conditions. Consultations are performed at The Kirklin Clinic and often involve collaborations with the divisions of Gastroenterology, Endoscopy and Radiology.

Surgical services offered include, but are not limited to the following diseases or disorders:

 Advanced laparoscopy, esophogeal reflux disease, hiatal and diaphragmatic hernia, achalasia, endoscopy, laparoscopic ventral and inguinal hernia repair 

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Mary T. Hawn, M.D. 

Interests:  Laparoscopy, gastroesophageal reflux disease, hiatal hernias, achalasia, gallstones, hernias, cancer of the gastrointestinal junction, laparoscopic splenectomy and adrenelectomy



Jamie A. Cannon, M.D. 

Interests: Colorectal cancer, including sphincter-sparing rectal surgery, and minimally invasive treatments including robotic surgery, laparoscopy, and TEMS. Surgical treatments of diverticulitis, rectal prolapse, Crohn's disease, and ulcerative colitis.


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John D. Christein, M.D.

Interests: Hepatobiliary and pancratic malignancies, pancreatic cancer clinical trials, gastrointestional surgery, biliary reconstruction, acute and chronic pancreatitis, pancreatic cystic neoplasms, laparoscopic liver and pancreas surgery, total pancreatectomy and islet cell auto-transplantation.

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Daniel Chu, M.D.

Interests:  Colon & Rectal surgery, minimally-invasive and robotic surgery, inflammatory bowel disease, colorectal cancer, diverticular disease, anorectal disease, and endoscopy.  

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Jayleen M. Grams, M.D. 

Interests: Advanced laparoscopy, laparoscopic bariatric surgery, laparoscopic treatment of gastroesophageal reflux disease, paraesophageal and diaphragmatic hernias, endoscopic inguinal hernia repair, and laparoscopic ventral hernia repair. Clinical and basic research metabolic syndrome.


Melanie S. Morris, M.D. 

Interests: Minimally invasive treatment of colorectal cancer, inflammatory bowel disease, diverticulitis, anorectal disorders and fecal incontinence.


John R. Porterfield, M.D. 

Interests: Endocrine, gastrointestinal disorders, minimal access parathyroidectomy, thyroidectomy, therapeutic neck dissections, laparoscopic adrenalectomy, neuroendocrine pancreatic tumors, gall bladder disease and herniorrhaphy.


Richard D. Stahl, M.D. 

Interests: Bariatric surgery (gastric sleeve and sleeve gastrectomy), minimally invasive abdominal surgery, gastrointestinal surgery.