Highlights
Age Groups Seen
- Adults
- Geriatrics
Languages
- English
Gender
MaleLocations
- 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
- phone: 617-724-4000
- fax: 617-726-0452
Expertise
Education
- Fellowship: Fox Chase Cancer Center, Medical Oncology, 1993
- Residency: University of Vermont Medical Center, Internal Medicine, 1990
- Medical Education: Georgetown University School of Medicine, 1987
Board Certifications
- Medical Oncology: American Board of Internal Medicine, 1993
- Internal Medicine: American Board of Internal Medicine, 1991
Insurance
- 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
- Medicaid NH
- Medicaid RI
- Medicare
- Medicare ACO
- Multiplan
- Railroad Medicare
- Senior Whole Health
- TriCare
- Tufts Health Plan
- Tufts Medicare Preferred
- United Health Care
- Wellpoint
- WellSense
- WellSense NH
Ratings & Reviews
4.9 out of 5
61 ratings, 25 reviewsThe 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.
- Reviewed on 1/22/2026
Dr. Giantonio is a very nice and understanding man. He is very professional and knowledgeable. He is thorough and is genuinely concerned with my overall health. I would recommend Dr. Giantonio to anyone that needs an oncologist.
- Reviewed on 1/15/2026
Very professional, empathetic and caring. A wonderful clinician.
- Reviewed on 1/14/2026
I've been with him for over 10 years and he has been the best doctor I have had.
- Reviewed on 1/14/2026
Dr Giantonio is the most caring, knowledgeable, interesting and kind person. Very, very fortunate to have him as my doctor.
- Reviewed on 1/15/2026
Give him a raise
- Reviewed on 1/15/2026
OUTSTANDING AS ALWAYS
- Reviewed on 1/14/2026
I trust the care they are giving me.
- Reviewed on 12/31/2025
Dr. Giantonio is always thorough. Being able to read scan results prior to my appointment helps me be ready with any concerns I have from the findings. He is patient and pulled up the different scans to show what was seen and why he does or does not feel it's anything to be alarmed about. He walks us over to the scheduling team to make sure we get the next appt set up when we need it. [redacted] I recommend MGH to any of my friends who have had the unfortunate diagnosis of cancer. I truly believe this team is the reason I am still alive today.
- Reviewed on 12/25/2025
I have had the most wounderful care, there is no number high enough to stage my outstanding experience with the ongoing care I I have received , I owe my life to dr. Giantonio and his team thank you from the bottom of my heart, love and respect [redacted]
- Reviewed on 11/19/2025
He was very knowledgeable about my information
- Reviewed on 11/19/2025
Patient, thoroughly explained my options, caring
- Reviewed on 10/16/2025
My first appointment went very well. The provider was very aware of my diagnosis and all my concerns. He answered all questions and recommended a good path for treatment
- Reviewed on 10/8/2025
My Husband and I were both more than satisfied with all aspects of this visit.
- Reviewed on 10/15/2025
First time meeting this doctor. Admitted to hospital that evening for surgery on colon.
- Reviewed on 8/13/2025
Top notch care
- Reviewed on 7/9/2025
Whenever I have issues they are usually resolved very quickly
- Reviewed on 5/28/2025
I am so impressed with Mass General and the team of Dr's I have. They gave me the proper treatment to cure my cancer. I am forever grateful for them.
- Reviewed on 5/28/2025
On Time!
- Reviewed on 5/30/2025
Excellent. Dr G is an excellent listener. He answers my questions and offers advice when needed
- Reviewed on 5/21/2025
Dr G is well informed, empathetic, and proactive. He's a great match for me.
- Reviewed on 5/14/2025
I think very highly about the care he provides.
- Reviewed on 5/1/2025
Both Bruce and [redacted] have been great
- Reviewed on 4/14/2025
Dr. Giantonio is the best. Always has been the best so I would recommend him to anyone who needs to see an oncologist. He has been my oncologist for years. Thank you, Dr. Giantonio.
- Reviewed on 4/11/2025
excellent guy
- Reviewed on 4/9/2025
Friendly, professional, knowledgeable ,punctual- who could ask for more!!