About Ioannis Mastoris, MD

Clinical Interests:

Treats:

Languages:

Locations

Massachusetts General Hospital
55 Fruit St.
Boston, MA 02114
Phone: 866-644-8910

Medical Education

  • MD, University of Athens School Of Medicine, Greece
  • Residency, Albert Einstein College of Medicine
  • Fellowship, Kansas University School of Medicine
  • Fellowship, Kansas University School of Medicine

American Board Certifications

  • Advanced Heart Failure and Transplant Cardiology, American Board of Internal Medicine
  • Cardiovascular Disease, American Board of Internal Medicine
  • Echocardiography, National Board of Echocardiography
  • Internal Medicine, 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

4.9out of 5(125 Ratings, 49 Comments)

January 2025

I feel as though my care throughout this visit could not have been better. My providers were well informed and answered all of my questions respectfully and with full knowledge of my situation.


January 2025

Hi, it was my first visit to Dr. Mastoris and we talked about a lot of different things, what he was thinking of happening in the future. And I thought he was a very nice person who knew what he was talking about. Thank you very much. [redacted]


December 2024

This was a first visit. The doctor was very patient and explained my issues and options clearly


December 2024

I was pleasantly surprised that the doctor spent as much time as he did with both myself and my wife explaining my condition and what needs to be done. It was refreshing to have somebody take that kind of time to explain everything on layman's terms and actually show so much care.


December 2024

The provider was very helpful and explaining the diagnosis and prognosis, I'll move forward.


December 2024

[redacted] I was very happy with him.


December 2024

Yeah, this is [redacted}. I met with Dr. Mastoris a couple weeks ago. He was definitely, I've seen probably a hundred doctors in my life. He's definitely the best communicator and really explained the whole process of what I'm going through. So he's my favorite doctor I've met in my life, so definitely high praise to him. Yeah, so that's about it.


December 2024

I alway very please with my treatment and the way they help me. And if I don't understand something's they will explain to me very well


November 2024

Dr. M is a fantastic doctor, listens well, has a sense of humor. I just loved meeting with him every time I've done it. It would be - there's no way that he can improve on my experience with doctors overall.


November 2024

Dr. Mastoris was very courteous and very patient with an elderly person. So keep up the good work and hopefully everybody else will follow the same line. Thank you so much.

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