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Mark D. Duncan

Mark D. Duncan, MD

General Surgery

Surgical Oncology

Accepting New Patients
5.0 of 5 stars96 ratings, 46 reviews
Johns Hopkins Affiliations:
  • Johns Hopkins School of Medicine Faculty

Languages

  • English

14 Insurances Accepted

View all

Gender

Male

About Mark D. Duncan

Professional Titles

  • Chief of Surgical Oncology at Johns Hopkins Bayview

Primary Academic Title

Associate Professor of Surgery

Background

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.

Recent News Articles and Media Coverage

Additional Academic Titles

Associate Professor of Oncology

Research Interests

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

Honors

  • Richard S. Ross Clinician Scientist Award
  • Golden Apple Teaching Award, Johns Hopkins Medical School, 7/1/17
  • Fred Eckhauser Mentorship Award of the Year, Department of Surgery, 7/1/16
  • Golden Apple Teaching Award, Johns Hopkins Medical School, 7/1/16
  • Keith Lillemoe Faculty Teacher of the Year, Department of Surgery, 7/1/14
  • Elected A.O.A, Johns Hopkins, 1/1/13
  • Outstanding Care Award for 2013, Sarcoma Alliance, 1/1/13
  • Fred Eckhauser Mentorship Award of the Year, 1/1/13
  • Keith Lillemoe Faculty Teacher of the Year, 1/1/12
  • Elected to Miller-Coulson Academy of Clinical Excellence, 1/1/10
  • Keith Lillemoe Faculty Teacher of the Year, 1/1/09
  • Golden Apple Teaching Award, Johns Hopkins Medical School, 1/1/08

Memberships

  • American College of Surgeons, Fellow
  • 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

Johns Hopkins Bayview, Chief of Surgical Oncology

Locations

  1. Johns Hopkins Bayview Medical Center
    • 4940 Eastern Avenue, Bayview Medical Offices, Level 03, Baltimore, MD 21224

    Expertise

    Education

    MedStar Georgetown University Medical Center

    Residency, General Surgery, 1994

    Washington VA Medical Center

    Fellowship, Surgery, 1992

    Mayo Clinic College of Medicine and Science

    Medical Education, MD, 1987

    Board Certifications

    Surgery

    American Board of Surgery, 1997

    Insurance

    Johns Hopkins providers accept various commercial health insurance plans. However, they may not be included in all of an insurance company's plans or offerings. This may include Exchange, Medicaid, Medicare, and specific limited benefit plans. Exceptions to participation also exist based on your employer’s benefits package and the provider's location or specialty. Please contact your insurer directly to make sure your doctor is covered by your plan. For more details, please review our Insurance Information.
    Search plans
    • Aetna
    • CareFirst
    • Cigna
    • First Health
    • Geisinger Health Plan
    • HealthSmart/Accel
    • Humana
    • Johns Hopkins Health Plans
    • MultiPlan
    • Pennsylvania's Preferred Health Networks (PPHN)
    • Point Comfort Underwriters
    • Private Healthcare Systems (PHCS)
    • UnitedHealthcare
    • Veteran Affairs Community Care Network (Optum-VACCN)

    Ratings & Reviews

    5 out of 5

    96 ratings, 46 reviews

    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.

    Overall Rating by Patient
    Average provider Overall Rating by Patient rating 4.9 out of 5 stars
    Provider Listened Carefully
    Average provider Provider Listened Carefully rating 5 out of 5 stars
    Provider Explained Things Clearly
    Average provider Provider Explained Things Clearly rating 5 out of 5 stars
    Provider Knew Medical History
    Average provider Provider Knew Medical History rating 5 out of 5 stars
    Provider Showed Respect
    Average provider Provider Showed Respect rating 5 out of 5 stars
    Provider Spent Enough Time
    Average provider Provider Spent Enough Time rating 5 out of 5 stars
    Search reviews
      5 out of 5 stars
      Reviewed on 2/18/2025

      Dr Duncan is the best. I brought my daughter to him for care also

      5 out of 5 stars
      Reviewed on 2/18/2025

      I used to assess healthcare quality for a living and the first thing you can tell about this provider is that he cares about his clients. He was very knowledgeable and made sure he explained everything to you In detail and In a way that Is understandable. I'm sure no client will ever be able to say they didn't understand a procedure and the risks and benefits prior to signing a consent form with this provider.

      5 out of 5 stars
      Reviewed on 2/11/2025

      Dr. Duncan is an angel. He is talented and brilliant. Dr. Duncan literally saved my life.

      5 out of 5 stars
      Reviewed on 2/4/2025

      Very professional,and personable!Always on top of my health.

      5 out of 5 stars
      Reviewed on 1/7/2025

      Dr. Duncan was very thorough. He reviewed my case history and made an appropriate recommendation based on my situation.

      5 out of 5 stars
      Reviewed on 11/26/2024

      Very satisfied with my visit and care plan

      5 out of 5 stars
      Reviewed on 11/26/2024

      Great all around visit.

      5 out of 5 stars
      Reviewed on 11/19/2024

      Dr. Duncan was very clear about my condition and the surgery required to get addressed. He was very attentive to the questions that me and my wife had. His dedication and clarity amazed me in all the conversations that we had!!

      5 out of 5 stars
      Reviewed on 11/19/2024

      He's a great doctor

      5 out of 5 stars
      Reviewed on 10/22/2024

      Very good service!! Thank you

      5 out of 5 stars
      Reviewed on 10/22/2024

      I was very impressed.

      5 out of 5 stars
      Reviewed on 10/15/2024

      Dr Duncan took excellent care of me

      5 out of 5 stars
      Reviewed on 10/1/2024

      He is such caring doctor.

      5 out of 5 stars
      Reviewed on 9/24/2024

      Very thorough, explained everything perfectly & took his time. I did not feel rushed or dismissed.

      5 out of 5 stars
      Reviewed on 9/17/2024

      I have known this provider for three years and he is well informed on diagnosing any problems that I had

      5 out of 5 stars
      Reviewed on 9/10/2024

      Understanding guy

      5 out of 5 stars
      Reviewed on 9/10/2024

      The best surgeon/doctor I ever had in US!

      5 out of 5 stars
      Reviewed on 8/20/2024

      I couldn't feel better about my care from Dr Duncan. His high levels of knowledge, experience and bedside manner are a perfect combination to deliver comfort and understanding. [Staff] is excellent as well! I feel so fortunate to be in their care.

      5 out of 5 stars
      Reviewed on 8/20/2024

      Dr. Duncan always makes you feel comfortable with what he explains to me

      5 out of 5 stars
      Reviewed on 8/16/2024

      Very knowledgeable, experienced, encouraging

      5 out of 5 stars
      Reviewed on 8/13/2024

      Had the best service that I would got a 61 years thanks [Patient's name]

      5 out of 5 stars
      Reviewed on 8/13/2024

      Good

      5 out of 5 stars
      Reviewed on 8/9/2024

      Dr Duncan was very nice and explained everything very well.

      5 out of 5 stars
      Reviewed on 7/30/2024

      Great surgeon who I would refer anyone to

      5 out of 5 stars
      Reviewed on 7/26/2024

      My first visit to JH, Dr. Duncan was very nice, I felt I would be in good hands.

      5 out of 5 stars
      Reviewed on 7/23/2024

      Easy to talk to, explained the problem so that I could under stand it.

      5 out of 5 stars
      Reviewed on 7/16/2024

      Dr Duncan has a the best there is.

      5 out of 5 stars
      Reviewed on 7/16/2024

      Dr Duncan is outstanding

      5 out of 5 stars
      Reviewed on 6/25/2024

      The best doctor I have ever encountered. Very succinctly shares and explains information with genuine concern. Made me confident throughout my visits, surgeries and follow up.

      5 out of 5 stars
      Reviewed on 6/25/2024

      Excellent Doctor.

      5 out of 5 stars
      Reviewed on 6/18/2024

      Excellent. Professional. Knowledgeable. Hrlpful. Very concerned. Explained situation well. Friendly.

      5 out of 5 stars
      Reviewed on 6/4/2024

      Provider was extremely well prepared for my visit. Had reviewed my history, purpose for visit, and ready to discuss treatment. Provider was professional, easy to speak with, concerned, and experienced.

      5 out of 5 stars
      Reviewed on 5/28/2024

      Dr. Duncan is a gem!!

      5 out of 5 stars
      Reviewed on 5/21/2024

      Wonderful experience. I appreciate having a salaried surgeon offer an opinion about my situation put my mind at ease. A second provider (not JHU) made me feel that their revenue was more important than my health.

      5 out of 5 stars
      Reviewed on 5/14/2024

      Excellent

      5 out of 5 stars
      Reviewed on 5/14/2024

      Dr. Duncan has a great bedside manner and makes me feel comfortable and well cared for.

      5 out of 5 stars
      Reviewed on 5/14/2024

      Excellent care. Took time to listen and explain.

      5 out of 5 stars
      Reviewed on 4/23/2024

      I couldn't think any higher of Dr Duncan. He is so knowledgeable, has helped me before (surgery), and bedside manner is excellent. I feel very confident in his care.

      5 out of 5 stars
      Reviewed on 4/23/2024

      Dr Duncan saved my life

      5 out of 5 stars
      Reviewed on 4/22/2024

      Best I ever had

      5 out of 5 stars
      Reviewed on 4/16/2024

      Dr Duncan was informed on my chart and was caring and informative.

      5 out of 5 stars
      Reviewed on 4/16/2024

      Perfect

      5 out of 5 stars
      Reviewed on 4/9/2024

      Verygoodihadhimmanyyearsover20years

      5 out of 5 stars
      Reviewed on 4/9/2024

      Excellent

      5 out of 5 stars
      Reviewed on 4/2/2024

      My Provider is very well communicative. Listened to me very patiently answered all my questions! He is an excellent surgeon!

      5 out of 5 stars
      Reviewed on 4/2/2024

      Dr. Duncan is incredibly knowledgeable, professional, and caring. I am so lucky to have found him!!