About Justin Gainor, MD

Treats:

Locations

Mass General Brigham Cancer Institute: Thoracic Oncology
55 Fruit St.
Boston, MA 02114
Phone: 877-726-5130

Medical Education

  • MD, Harvard Medical School
  • Residency, Massachusetts General Hospital
  • Fellowship, Brigham and Women's Hospital

American Board Certifications

  • Medical Oncology, American Board of Internal Medicine

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.

Reviews: Comments and Ratings

5.0out of 5(75 Ratings, 29 Comments)

August 2025

Because of Dr Gainor, I'm living to play with my 4GrandChildren with my 5th one on the way. Each day is a blessing.


August 2025

Dr. Gainor and the entire staff at MGH has provided excellent care for the past eight years.


July 2025

I am blessed to have Dr. Gainor and his staff as part of my cancer care. Professional, caring, knowledgeable are just a few words to describe this team. I feel extremely well informed and a key part of the decision making process


July 2025

Very knowledgeable and compassionate


July 2025

I am just starting out with this provider but am very pleased with him. He was very professional and knowledgeable about my condition and I feel confident in him. He was also very informative and explained things in a way that I could understand not to mention the fact that he was extremely patient with my questions and spent a long time with me.


June 2025

Dr Gainor is caring and very patient. Each time (2) I've come to him for a second opinion he's been kind and explained everything really well and taken all the time my family and I have needed for questions. I have already recommended 2 friends to CDH/MGB for cancer treatment and they are just as satisfied.


June 2025

It was a pleasant experience visiting Dr. Gainor and his team. My great appreciations for their patience and professionalism.


May 2025

Dr. Gainor is brilliant. He's been kind and knowledgeable for each one of my treatments. I love the care on deck and that includes everybody at Mass General.


May 2025

Dr Gainor listens and he cares explains things that I can try and understand.


May 2025

He's always so kind, caring and informative. Very happy with him.

View More
Ratings and Comments Powered by NRC Health