
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
- Hematology/Oncology
- 55 Fruit Street, Boston, MA 02114
- Get Directions
- phone: 866-493-1612
- fax: 617-726-0452
Expertise
Education
- Fellowship: EBP,DCE,NCI,NIH,Bethesda,Md, Epidemiology Research, 1985
- Fellowship: National Cancer Institute, Medical Oncology, 1985
- Residency: Beth Israel Deaconess Hospital, 1981
- Internship: Beth Israel Deaconess Hospital, Internal Medicine, 1979
- Medical Education: Tufts University School of Medicine, 1978
Board Certifications
- Medical Oncology: American Board of Internal Medicine, 1983
- Internal Medicine: American Board of Internal Medicine, 1981
Insurance
- Aetna
- Beech Street
- Blue Cross Blue Shield
- Blue Cross Blue Shield - Indemnity
- 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
- Medicaid VT
- 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
170 ratings, 75 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 2/4/2026
I feel Dr Clark is interested in my medical health but I would like more detailed information about results of all my testing
- Reviewed on 2/7/2026
Been seeing Dr Clark for over 20 years. Just excellent!
- Reviewed on 1/30/2026
I have been really lucky, I feel, to have gotten in with Dr. Clark. He's been wonderful since my first visit and all the follow-up appointments that I've had through Zoom and just keeping on top of all my tests and everything. He's been amazing.
- Reviewed on 1/30/2026
Yes, Dr. Jeffrey Clark essentially saved my life with his team [redacted]. I mean, there is nothing negative to say about the care from Mass General. They are all, they all go beyond the call, [redacted] Mass General does go the extra mile for sure.
- Reviewed on 1/17/2026
Dr Clark and Dr [redacted] were familiar with my history, recent scans and lab results. I always appreciate Dr Clark's insight and willingness to discuss what my best options are for treatment.
- Reviewed on 1/10/2026
Easy to talk with. Good listener and very kind.
- Reviewed on 1/5/2026
Dr. Clark has always provided excellent service to me as an oncology patient, and I want to especially recognize his assistant who was there this past visit. I believe she was a practicing physician, and excellent, excellent follow-up and excellent everything. Thank you.
- Reviewed on 1/1/2026
Very professional. Dr. Clark has been super to me. Can't say enough great things about him.
- Reviewed on 1/1/2026
Excellent doctor is very nice explain well
- Reviewed on 12/25/2025
Dr Jeffrey Clark is amazing!
- Reviewed on 12/19/2025
This provider did schedule a CT scan and blood tests the same day of the visit and then scheduled a virtual visit for a week later to discuss. Results were posted to patient gateway but could not clearly understand the results. Hoping the results are not serious where patient should be notified immediately. More blood tests were also ordered by his PCP but don't think they were added on the day of our visit and think they should have been added. Otherwise, provider was very professional, knowledgeable, courteous, and addressed all of our questions and concerns. Patient did say he really liked the provider. Provider did discuss other issues not directly related to the visit (concerns that required coordination with cardiology) and recommended follow up consultation and appointments.
- Reviewed on 12/15/2025
I am so happy to have Dr. Clark as my oncologist. I rely on him. I trust him. He has been an incredible support to me for many, many years.
- Reviewed on 12/12/2025
Extremely helpful, explained things that helped me understand what to expect. A pleasure to talk with.
- Reviewed on 12/11/2025
Dr. Clark is highly knowledgeable and well informed. I am very fortunate to benefit from his expertise and impressive knowledge.
- Reviewed on 11/27/2025
I love the care and people keeping me alive. My biggest problem is with getting drug refills in time when a new prescription is required. There is a tendency toward beuricratic momentum as I feel there is some resistance to existing strict policies.
- Reviewed on 11/26/2025
Thanks
- Reviewed on 11/20/2025
Dr. Clark is extremely knowledgeable and always take the time to answer questions.
- Reviewed on 11/20/2025
Dr. Clark is an excellent doctor! He listens and spends the time you need in the office.
- Reviewed on 11/20/2025
He was very helpful talking to my daughter about and myself to everything and he took time to explain everything and to give me thought, refer me to another, for another appointment.
- Reviewed on 11/17/2025
Dr. Clark is beyond the best!
- Reviewed on 11/17/2025
Dr. Clark and his entire team are incredibly knowledgeable, expert, and compassionate in dealing with patients, particularly in my case, my [redacted]-year-old mother. Just couldn't say enough great things. Thank you.
- Reviewed on 11/7/2025
Very kind and thorough provider, has called me at each hospitalization no matter where I am.
- Reviewed on 11/5/2025
I have never experienced any kind of bad treatment. Has been very knowledgeable and shows concern in my care.
- Reviewed on 11/7/2025
Dr. Clark is an excellent oncologist on the type of my cancer. After follow-up treatment and care via Dr. Clark's team for nearly two years, my physical condition has significant improved. Dr. Clark used medical methods with great caution and precisely employed necessary tests to diagnose my various sudden symptoms. He also paid a great attention to the Chinese traditional medicine that I received during the course of recovery after my surgery. He listen patiently to my description and treat my anxiety professionally. I deeply trust and rely on the treatment provided by Dr. Clark for my recovery.
- Reviewed on 11/2/2025
Doctor Clark and him nurse and staff are all nice and very helpful and listen to me I am very happy with them .
- Reviewed on 10/31/2025
Dr. Jeffrey Clark is an excellent doctor. I'm very happy with him.
- Reviewed on 10/29/2025
Dr Clark is smart and caring. I know he wants the best for me. He had to tell me my cancer was progressing and I needed to be treated with chemotherapy again...so not an easy visit but he delivers bad news in a caring way and with optimism that treatment will help.
- Reviewed on 10/30/2025
I always learn something new at every visit. Every provider has always listened to me babble on and get me good solutions for my current problems.
- Reviewed on 10/27/2025
Warm and caring, thorough and thoughtful- he took the time to explain everything and answer questions
- Reviewed on 10/21/2025
The very fact his title "oncologist" infers, seriousness and death, he puts me at ease, and instills peace and deliberate action, or inaction when necessary. I'm glad I was referred to him.
- Reviewed on 10/6/2025
Dr. Clark is a wonderful doctor who is very dedicated to his patients and he explains things very well and he said he was going to follow up with the scan which had been submitted and he did that at 7 o'clock at night. So he's just a tireless worker.
- Reviewed on 10/7/2025
I'm very happy as a patient at mass general
- Reviewed on 9/29/2025
Dr. Clark is one of the nicest, kindness and knowledgeable doctors we have met. We would recommend him to anyone that needed an oncologist. We feel he is the best MGH has.
- Reviewed on 9/24/2025
Dr. Clark is the best. So knowledgeable and caring.
- Reviewed on 9/22/2025
Very good
- Reviewed on 9/22/2025
Dr. Clark is always very kind, calm, knowledgeable, and helpful, and has been a big part of my care for 13 years. Highly recommend him.
- Reviewed on 9/20/2025
Dr Clark is the best
- Reviewed on 9/15/2025
Dr Clark is knowledgeable, friendly and proficient. Trust him completely.
- Reviewed on 9/8/2025
As always perfect
- Reviewed on 8/30/2025
Drs Clark and [redacted] are incredibly responsive doctors who listen and have so much experience. They helped me feel more at ease. I also enjoyed listening to them collaborate about care ideas.
- Reviewed on 8/28/2025
Dr. Clark is the best. He really knows medicine and how to treat my cancer. He keeps me informed and offers great advice. His manner is always pleasant. I really like that Dr. Clark tells me exactly what is going on. I couldn't be more pleased.
- Reviewed on 8/28/2025
Dr. Clark is always patient, mindful of my concerns and willing to answer anything, any questions that I have that are about this appointment or any other appointments.
- Reviewed on 8/28/2025
Prompt and professional.
- Reviewed on 8/18/2025
Dr. Clark is exceptional, very knowledgeable, very kind and a great listener . He explains well and puts you at ease. I feel under his care I am safe, I trust him.
- Reviewed on 8/14/2025
Iwas so impressed with Dr. Clark. I am 100 percent confident in my care and so happy I went there. Thank you for everything. [redacted]
- Reviewed on 8/17/2025
they explained things clearly
- Reviewed on 7/26/2025
Dr. Clark is kind and considerate of any concerns I have.
- Reviewed on 7/21/2025
He was great
- Reviewed on 7/21/2025
Dr Clark is the best! He is knowledgeable, patient and listens to my needs. He spends as much time as needed to make me feel comfortable.
- Reviewed on 7/16/2025
Knowledgeable, kind, never rushes.
- Reviewed on 7/12/2025
This oncologist was well spoken and knowledgeable. I was , however, completely distracted by his comb-over. His hair kept falling in his face and he had to remove it regularly. He's a grown-ass man. Have him cut his hair please.
- Reviewed on 7/7/2025
I feel after the visit between us and Dr. Clark. I trust his opinion. I feel very confident of the doctor.
- Reviewed on 7/6/2025
Very thorough and explained everything to me. He covered all my concerns.
- Reviewed on 7/4/2025
Dr. Clark was filling in for somebody else that wasn't available, but he did a fantastic job and took care of everything.
- Reviewed on 7/2/2025
Dr Clark is very knowledgeable and compassionate. I value his input about my care.
- Reviewed on 6/24/2025
He has been my provider for over 20 years. Unfortunately he has been unable to prevent me from getting older.
- Reviewed on 6/22/2025
I was actually very happy to see a gastroenterologist, as most if my problems are directly related to those issues. He was very informative and helpful!
- Reviewed on 6/20/2025
Dr. Clark is a caring, responsive, knowledgeable doctor who provides excellent care and has throughout my entire treatment cycle. I would highly recommend his services to anyone going through a similar health malady as I've been going through. He's absolutely wonderful.
- Reviewed on 6/19/2025
Dr. Clark is an extremely patient and caring doctor. Probably one of the best I've ever had. He always listened to everything I had to say, and I couldn't say anything negative about him. I am very happy he's my doctor. Very appreciative. of him and everything he has done for me. Thank you.
- Reviewed on 6/15/2025
Dr Clark was attentive and very kind and very informed about all of internal medicine issues.
- Reviewed on 6/17/2025
It was my first visit with Dr. Clark. So far so good
- Reviewed on 6/12/2025
Thoughtful, respectful and kind.
- Reviewed on 6/11/2025
Dr Clark is extremely knowledgeable and cares about his patients.He is thorough and takes time to explain everything so it is understandable.
- Reviewed on 6/11/2025
This was my first meeting with Dr. Clark but he seemed like a great doctor, very knowledgeable, personable, and engaging. Very easy to talk to.
- Reviewed on 6/6/2025
I had an excellent experience with Dr. Clark. He answered all my questions. He listened to my concerns. Very thoughtful and thorough, and I feel very comfortable with his care.
- Reviewed on 5/28/2025
He listens carefully and takes the necessary time to answer questions or concerns.
- Reviewed on 5/29/2025
Dr Clark and his staff arranged for me to have the MRI on site instead of at a satellite campus and moved our in-person visit to an earlier time in the afternoon so that I could make good use of my time. I commute from Cape Cod, so this was a better use of my time.
- Reviewed on 5/26/2025
Probably need some more candid discussions
- Reviewed on 5/26/2025
Dr. Clark is easy to talk to, does what is best for me medically, explains my issues so I understand them.
- Reviewed on 5/14/2025
Very good.
- Reviewed on 5/12/2025
Um, during my experience with this provider, Dr. Clark was very thorough and resourceful. He provided me with all the information that we needed, answered all of our questions, and was able to do it in a way that was easy to understand and seemed very kind and down to earth.
- Reviewed on 5/1/2025
Very knowledgeable, shows empathy, I'm confident with him as a provider.
- Reviewed on 4/21/2025
Very clear in explaining everything and working on making a treatment plan. We are in good hands
- Reviewed on 4/7/2025
I was so happy to have Dr. Clark ... after all I have been through with an unwanted hysterectomy and a neuroendicrine finding. He gave me such great information and hope. He was so kind. After a rather traumatic surgery... he made it all okay.
- Reviewed on 4/2/2025
I'm very happy with the service I'm getting from Mass General. Everything is very good. Thank you.