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Mark Douglas Duncan, M.D.

Headshot of Mark Douglas Duncan
5.0out of 5
46 Ratings
  • Chief of Surgical Oncology at Johns Hopkins Bayview
  • Associate Professor of Surgery


Abdominal Surgery, Colon Cancer, Colon Tumors, Esophageal Cancer, Gallbladder Cancer, Gallbladder Tumors, Gastric Cancer, Gastroesophageal Cancer, Gastroesophageal Junction Cancer, Gastrointestinal Cancers, Gastrointestinal Stromal Tumors (GIST), Gastrointestinal Tumors, General Surgery, Hereditary Diffuse Gastric Cancer (HDGC), Intestinal Cancer, Intestinal Tumors, Laparoscopic and Minimally Invasive Surgery, Pancreatic Cancer, Sarcoma, Stomach Cancer, Stomach Tumors, Surgery more

Research Interests

Gastric cancer; proximal gastrectomy; CDH1 mutation gastric cancers; HDGC; Tumorigenesis in gastroesophageal and colorectal cancer; EsophagCap more

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Johns Hopkins Bayview Medical Center

Appointment Phone: 410-550-1226
4940 Eastern Avenue
Baltimore, MD 21224 map
Phone: 410-550-1226 | Fax: 410-550-2011

The Johns Hopkins Hospital (Main Entrance)

Appointment Phone: 410-550-1226
1800 Orleans St.
Sheikh Zayed Tower
Baltimore, MD 21287 map
Phone: 410-550-1226 | Fax: 410-550-2011


Dr. Duncan specializes in gastrointestinal surgical oncology, including surgery of the esophagus, stomach, intestine, colon and rectum, gallbladder and pancreas, adrenal and retroperitoneal sarcoma.  He has national and international expertise in gastric cancer and hereditary gastric cancer including CDH-1.  He wrote the Johns Hopkins Patient Guide for Cancer of the Stomach and Esophagus.   Dr. Duncan gives lectures and presentations nationally and internationally on Gastric and GI cancer surgery and works with Johns Hopkins International on cancer programs and centers overseas. more


  • Chief of Surgical Oncology at Johns Hopkins Bayview
  • Associate Professor of Surgery
  • Associate Professor of Oncology

Departments / Divisions

Centers & Institutes



  • MD; Mayo Clinic Alix School of Medicine (1987)


  • General Surgery; MedStar Georgetown University Medical Center (1994)


  • Surgery; Veterans Affairs Medical Center (1992)

Board Certifications

  • American Board of Surgery (General Surgery) (1997)

Research & Publications

Activities & Honors


  • Richard S. Ross Clinician Scientist Award
  • Golden Apple Teaching Award, Johns Hopkins Medical School, 2008
  • Keith Lillemoe Faculty Teacher of the Year, 2009
  • Keith Lillemoe Faculty Teacher of the Year, 2012
  • Elected A.O.A, Johns Hopkins, 2013
  • Outstanding Care Award for 2013, Sarcoma Alliance, 2013
  • Elected to Miller-Coulson Academy of Clinical Excellence, 2010
  • Fred Eckhauser Mentorship Award of the Year, 2013
  • Keith Lillemoe Faculty Teacher of the Year, Department of Surgery, 2014
  • Fred Eckhauser Mentorship Award of the Year, Department of Surgery, 2016
  • Golden Apple Teaching Award, Johns Hopkins Medical School, 2016
  • Golden Apple Teaching Award, Johns Hopkins Medical School, 2017


  • American College of Surgeons
  • Association of Academic Surgeons
  • Society of Surgical Oncology
  • Society of University Surgeons
  • Southern Surgical Society
  • Alpha Omega Alpha

    Medical Honor Society

  • Society fo Surgery of the Alimentary Tract

    Society of GI surgeons

Professional Activities

  • Chief of Surgical Oncology , Johns Hopkins Bayview

Videos & Media

  • Play Video:

    Johns Hopkins Surgical Oncologists Get Personal

  • Play Video:

    Gastric Cancer | Minan's Story

  • Play Video:

    Gastric Cancer | Stephanie's Story

Recent News Articles and Media Coverage

Stomach Cancer: Know Your Risks & Treatment Options, Johns Hopkins Surgery (4/26/2017)

Patient Ratings & Comments

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

  • 5.0 Provider Explained Things Clearly
  • 5.0 Provider Listened Carefully
  • 5.0 Provider Gave Easy to Understand Instructions
  • 4.9 Provider Knew Medical History
  • 5.0 Provider Showed Respect
  • 5.0 Provider Spent Enough Time
  • 5.0 Overall Rating by Patient


5.0 out of 5 (46 Ratings, 30 Comments)
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