Margaret Geraldine Keane, M.B.B.S., M.Sc.

Headshot of Margaret Geraldine Keane
  • Assistant Professor of Medicine


Endoscopic Retrograde Cholangiopancreatography, Endoscopic Sleeve Gastroplasty, Endoscopic Ultrasound, Gastroenterology, Internal Medicine, Pancreatic Cysts, Pancreatitis, Therapeutic Endoscopy more


The Johns Hopkins Hospital

600 N. Wolfe Street
Baltimore, MD 21287
Phone: 410-502-3699 | Fax: 443-683-8335
The Johns Hopkins Hospital - Google Maps

Sibley Medical Building

Appointment Phone: 410-933-7495
5215 Loughboro Road NW
Washington, DC 20016
Phone: 410-933-7495 | Fax: 202-660-6103
Sibley Medical Building - Google Maps


Margaret “Geri” Keane is a gastroenterologist specializing in therapeutic endoscopy, obesity medicine, biliary complaints and diseases of the pancreas. She treats people who require assistance with weight loss and patients who have pancreatic cysts, bile duct stones or strictures, cancers of the bile duct or pancreas, and acute or chronic pancreatitis, to name a few. She offers a range of endoscopic approaches to weight loss, including endoscopic sleeve gastroplasty, the gastric balloon procedure, gastric injections and transoral gastric outlet reduction.

Dr. Keane earned her medical degree at Guy’s, King’s and St Thomas’ Medical school in London. She completed her internal medicine residency at The Hammersmith and Charing Cross hospitals in London, followed by a fellowship in gastroenterology and hepatology at University College London Hospitals, the Royal Free Hospital and King’s College Hospital in London. During her gastroenterology fellowship, Dr. Keane undertook a master’s degree in medical education and a Ph.D. at University College London. Her doctorate explored novel diagnostic and therapeutic strategies for the management of pancreatic cysts. Following her gastroenterology fellowship, Dr. Keane completed a fellowship in hepatology and endoscopic retrograde cholangiopancreatography/endoscopic ultrasound at King’s College London, followed by a two-year advanced endoscopy fellowship at Johns Hopkins. 

She is certified in general internal medicine, gastroenterology and hepatology by the Joint Royal Colleges of Physicians Training Board of the United Kingdom. She is a member of the Royal College of Physicians of the United Kingdom and is a fellow of the Higher Education Academy. She is a recipient of the American Society for Gastrointestinal Endoscopy 2022 Endoscopic Training Award, which enabled her to gain dedicated training in bariatric endoscopy at Mohak bariatric center in Indore, India, one of the busiest bariatric centers in the world.

Dr. Keane’s research interests include pancreatic cysts, early diagnostic strategies for pancreatic and biliary tract cancers, obesity medicine and endoscopic innovation. She has published more than 60 original articles, editorials, book chapters and review articles.

She sees patients at Sibley Memorial Hospital in Washington, D.C., and at The Johns Hopkins Hospital and Johns Hopkins Bayview Medical Center in Baltimore. more


  • Assistant Professor of Medicine

Departments / Divisions



  • MBBS; King's College London School of Medicine and Guy's - King's and St Thomas' Hospital (2006)


  • Gastroenterology and Hepatology; Hammersmith and Charing Cross hospital (2010)


  • Hepatology; Derriford Hospital (2017)
  • Gastroenterology; Johns Hopkins University School of Medicine (2021)
  • Hepatology; King's College Hospital (2017)
  • Hepatology; King's College Hospital (2019)
  • Gastroenterology and Hepatology; Newham University Hospital (2013)
  • Gastroenterology; University College London Hospital (2018)
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