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Jonathan B Greer

Jonathan B Greer, MD

Surgical Oncology

Highlights

Age Groups Seen

  • Adults
  • Geriatrics

Languages

  • English

Gender

Male

Locations

  1. Mass General Brigham Cancer Institute Orthopedic Oncology Clinic at Boston
    • 55 Fruit Street, Yawkey Building, 3rd Floor, Suite 3B, Boston, MA 02114
    • Get Directions
  2. Mass General Brigham Cancer Institute at the Tucker Gosnell Center for Gastrointestinal Cancer
    • 32 Fruit Street, Yawkey Building, 7th Floor, Suite 7e, Boston, MA 02114
    • Get Directions

Expertise

Education

  • Fellowship: University of Pittsburgh Medical Center (Pennsylvania), Complex General Surgical Oncology, 2018
  • Residency: Massachusetts General Hospital, Surgery, 2016
  • Residency: Massachusetts General Hospital, Surgery, 2011
  • Internship: Massachusetts General Hospital, General Surgery, 2009
  • Medical Education: Brown University, 2008

Board Certifications

  • Surgery (General Surgery): American Board of Surgery, 2019
  • Surgery (General Surgery): American Board of Surgery, 2017

Insurance

Search plans
  • Aetna
  • Beech Street
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield Medicare
  • Cigna
  • Commonwealth Care Alliance
  • Coventry
  • Fallon Health
  • Harvard Pilgrim Health Care
  • Humana
  • Maine Community Health Options
  • Mass General Brigham Health Plan
  • MassHealth
  • Medicaid ME
  • Medicare
  • Multiplan
  • Railroad Medicare
  • Senior Whole Health
  • Tricare
  • Tufts Health Plan
  • Tufts Medicare Preferred
  • United Health Care
  • Wellpoint
  • WellSense

Ratings & Reviews

4.9 out of 5

101 ratings, 31 reviews

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

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  • Reviewed on 4/5/2026

    superb experience

  • Reviewed on 4/4/2026

    Dr Greer is a gift. One of the most caring physicians I have known and even comes with a great humor.... An extra blessing. [redacted]

  • Reviewed on 3/28/2026

    Excellent in making us feel comfortable and understanding of our concerns. Very grateful for this experience.

  • Reviewed on 4/3/2026

    He explained complicated issues in simple terms

  • Reviewed on 3/30/2026

    Dr. Greer was excellent from the moment I met him with all his explanations and the entire process of working with him for my health just has been wonderful.

  • Reviewed on 3/28/2026

    I have great respect for Dr. Greer. He is so focused on the whole person. If I need surgery in the future, I would follow him anywhere.

  • Reviewed on 3/28/2026

    Dr. Greer has been fantastic!!

  • Reviewed on 3/26/2026

    Excellent

  • Reviewed on 3/24/2026

    [redacted] Dr. [redacted] left big shoes to fill when he retired, [redacted]. Dr. Greer has been the best at filling those shoes and I am happy. He is competent, knowledgeable, with incredible bedside manners and patience while explaining updated follow up results and what is expected in the future. [redacted]

  • Reviewed on 3/2/2026

    Dr Greer was extremely nice and down to earth. He explained everything to me in a professional and understanding manner.

  • Reviewed on 2/28/2026

    Dr. Greer was wonderful - very informed and informative.

  • Reviewed on 2/19/2026

    The doctor provided me with all aspects of my medical care

  • Reviewed on 2/16/2026

    Dr. Greer was on time; very approachable; listened to my concerns and provided the answers I was looking for.

  • Reviewed on 2/9/2026

    Overall positive - I am looking forward to fast turn around on next steps

  • Reviewed on 2/9/2026

    I found Dr. Greer to be very pleasant and knowledgeable and the meeting that I had with him, he answered all of my questions and I feel like he is a great doctor.

  • Reviewed on 2/2/2026

    Excellent doctor, very knowledgeable and kind. Thank him for his great service and guidance.

  • Reviewed on 2/1/2026

    Great professionals

  • Reviewed on 2/1/2026

    I felt very well cared for and lucky to have Dr Greer as my advisor!

  • Reviewed on 1/11/2026

    Caring, competent and hard working

  • Reviewed on 12/29/2025

    Dr. Greer was kind, compassionate and made me feel so much better. His positivity helped me so much!

  • Reviewed on 12/18/2025

    Dr. Greer is excellent in all ways.

  • Reviewed on 12/12/2025

    Dr Greer is a kind, compassionate doctor. Unfortunately, he was unable to provide Pipac procedure or give me assurance that going to another hospital to receive this clinical trial might help. Not his fault, I guess this is the way of clinical trials. I was just hoping that someone might say "yes this is a procedure for you." Do I just wait for chemo to stop working ? I wish the MGH team might collaborate more and come up with ideas for us terminal appendiceal patients. I don't want to just wait to die.

  • Reviewed on 12/11/2025

    I was very impressed with the way Dr. Greer and Dr. [redacted] talked to me and tried to explain things. [redacted] I'm happy with what they had to say to me. Some things I understood, some things I didn't, but they did explain things. [redacted]

  • Reviewed on 12/7/2025

    He was very positive and friendly

  • Reviewed on 12/1/2025

    Best hospital to be in.

  • Reviewed on 11/23/2025

    He was very caring and understanding and a pleasure to talk to I am glad that I now have him as a doctor

  • Reviewed on 11/19/2025

    Feel very grateful to have had Dr. Greer Not only is he extremely skilled as a surgeon, he excels at making personal contact, clearly explaining and coordinating the process. I am beyond grateful and confident that I had the very best care possible.

  • Reviewed on 11/17/2025

    Dr Greer is a very knowledgeable and caring doctor. I was in awe over his interest in my case, his experience with my diagnosis and his credentials are exceptional and because of the rare cancer that i have, I feel 100% confident that Dr Greer is the best surgeon for my situation . Dr Greer showed compassion, he spoke to me in a manner that truly showed he was interested in my case, and kept me upbeat with his humor by carefully explaining exactly how he was going to proceed with my surgery- drawing diagrams and presenting my 3D images from CT scan. He went the "extra mile" to fit me into his schedule quickly-within a week-which was huge!! [redacted] Im scared out of my mind to be facing my diagnosis and my surgery but i have peace of mind that i am in the best hands at MGH and i couldn't be luckier to have Dr Greer as my doctor, I am confident that I am going to the best place for my situation. Thank you Dr Greer for taking on my case in a prompt manner, YOU ROCK!!

  • Reviewed on 11/12/2025

    He was great, very thorough and explained everything to us.

  • Reviewed on 11/9/2025

    Despite this being my first visit with this doctor, he had thoroughly familiarized himself with history.

  • Reviewed on 11/9/2025

    Dr. Greer was involved in my major surgery [redacted] years ago and remembered some of my details. [redacted] He did not seem rushed and discussed options for me. I was pleased and hope to return for Surgery in [redacted].