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Leon Pappas

Leon Pappas, MD, MSC, PhD

Hematology OncologyInternal Medicine

Highlights

Age Groups Seen

  • Adults
  • Geriatrics

Languages

  • English

Gender

Male

Locations

  1. Mass General Brigham Cancer Institute Medical Oncology at the Tucker Gosnell Center for Gastrointestinal Cancer
    • 32 Fruit Street, Yawkey Building, 7th Floor, Suite 7e, Boston, MA 02114
    • Get Directions
  2. Mass General Brigham Cancer Institute Hematology Evening Clinic at Boston
    • 32 Fruit Street, Yawkey Building, 7th Floor, Suite 7b, Boston, MA 02114
    • Get Directions

Expertise

Education

  • Fellowship: Brigham and Women's Hospital, Medical Oncology, 2024
  • Fellowship: Dana Farber Cancer Institute*, Medical Oncology, 2024
  • Residency: Massachusetts General Hospital, Internal Medicine, 2021
  • Medical Education: Boston University, 2018

Board Certifications

  • Internal Medicine: American Board of Internal Medicine, 2024
  • Internal Medicine: American Board of Internal Medicine, 2021

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 CT
  • Medicaid RI
  • Medicare
  • Medicare ACO
  • Multiplan
  • Senior Whole Health
  • Tricare
  • Tufts Health Plan
  • Tufts Medicare Preferred
  • United Health Care
  • Wellpoint
  • WellSense

Ratings & Reviews

4.7 out of 5

106 ratings, 32 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.

How likely would you be to recommend this provider to your family and friends?
Search reviews
  • Reviewed on 2/13/2026

    I felt very welcome. I felt confident. [redacted] Everybody was nice, kind, polite. Every answer was questioned the right way, and I understood every answer from the doctor and the nurses. Love going there. Love my team at Mass General Hospital with Dr. Pappas, the whole team.

  • Reviewed on 2/2/2026

    MGH has been incredible through my treatment and follow ups

  • Reviewed on 1/28/2026

    Dr Pappas was clear with the information available to him regarding my care

  • Reviewed on 1/11/2026

    He had reviewed my medical records prior to seeing me and was aware of my scan results. He listened carefully and answered my questions thoroughly. He provided possible options for future care. He was kind and respectful, and gave me all the time that I needed.

  • Reviewed on 1/12/2026

    Dr. Pappas was excellent in explaining everything to me and I feel totally confident that I'm in great hands.

  • Reviewed on 12/29/2025

    Great care, responds quickly to text questions. Listens to my concerns.

  • Reviewed on 12/29/2025

    Dr. Pappas and his staff were excellent knowledgeable and professional. [redacted]

  • Reviewed on 12/24/2025

    Part of continuing care as part of my cancer care and recovery.

  • Reviewed on 12/25/2025

    I was glad that Dr. Pappas made it a priority to have a telehealth visit since he was unable to see me in person during my visit to Mass General. I am sure Dr. Pappas has my best interest in his heart and he will make an ernest attempt to find me a slot in his clinical trials. I trust him.

  • Reviewed on 12/20/2025

    Very smart. Spoke at a high level at times.

  • Reviewed on 11/27/2025

    Dr. Pappas was most encouraging.

  • Reviewed on 11/22/2025

    Everyone I encounter is very caring and , knowledgeable

  • Reviewed on 11/22/2025

    Very professional

  • Reviewed on 11/8/2025

    Very warm caring person.

  • Reviewed on 10/10/2025

    Seems very knowledgeable and helpful.

  • Reviewed on 10/6/2025

    A very pleasant and informative visit

  • Reviewed on 10/4/2025

    very professional and compassionate - extremely knowledgeable about his specialty

  • Reviewed on 10/2/2025

    I have the highest respect for Dr. Pappas. He's a wonderful clinician and wonderful bedside manner.

  • Reviewed on 9/29/2025

    Excellent service by this care provider. Would definitely recommend him. Thank you.

  • Reviewed on 9/22/2025

    Very knowledgeable and concerned with my health challenges.

  • Reviewed on 9/20/2025

    I expected more detailed info regarding available trials in the Boston area not just MGH.

  • Reviewed on 9/19/2025

    Very professional and caring.

  • Reviewed on 9/4/2025

    The doctor was good. The nurses were good. I had a good response. I didn't wait too long. Very happy with it.

  • Reviewed on 8/9/2025

    Very nice and informative

  • Reviewed on 8/6/2025

    Exceeded expectations

  • Reviewed on 8/3/2025

    Very professional.

  • Reviewed on 7/27/2025

    Dr.Pappas was very friendly but also very intelligent. He listened to everything we all had to say. I came with my son and son in law. He gave us a lot of information and did not rush us. I am so happy that I went to see Dr.Pappas. I am going back in a couple of weeks for a follow up.

  • Reviewed on 7/20/2025

    Excellent

  • Reviewed on 6/16/2025

    He was very helpful

  • Reviewed on 6/11/2025

    Dr Pappas and Dr [redacted] were great. Discussed my case and the options for care.

  • Reviewed on 5/29/2025

    Knowledgeable but spoke very fast. Just needs to slow down.

  • Reviewed on 5/25/2025

    The only problem was having to wait 55-60 minutes in the room to be seen. We were not iupdated or nformed of any provider delay.