Jeffrey William Clark, MD

Patient Feedback

4.896842 average rating from 190 reviews

• Very impressed with the quality of care provided by this provider. Patient, informative, willing to answer any and all questions and appreciated the same day follow up.

  2026-07-07

• Everyone I have dealt with at MGH have been very professional.

  2026-07-01

• Explained my condition and options clearly. Went for a second option and explore options for potential trials. Well worth the visit.

  2026-06-30

• He was fantastic about explaining things and extremely knowledgeable

  2026-06-30

• I felt very comfortable with Dr.Clark. He is a great communicater.He makes sure you understand all that has been discussed. Wonderful doctor

  2026-06-28

• Beyond professional

  2026-06-27

• Dr. Clark was wonderful. I really loved him and I am glad he's part of my team and super nice and I felt really comfortable with him.

  2026-06-25

• Dr. Clark was great as usual. Very reassuring ?

  2026-06-20

• Dr. Clark is a godsend

  2026-06-17

• Dr. Clark has been an extraordinary physician and colleague. He has been exemplary in his attitude, his behavior, his approach to care. He is calm and considerate, and I could not have asked for a better person to treat me. The entire treatment team, in fact, for my answer was remarkable. So I have nothing but the highest regards for everybody that I came in contact with.

  2026-06-20

• Dr. Clark is phenomenally knowledgeable and extremely kind in caring for my [redacted] year old mother. His level of engagement and his expertise are very reassuring, as are his mannerisms when working with and talking with patients. He is an extraordinary doctor!

  2026-06-06

• I can't say enough good things about Dr. Clark. He's really excellent. I appreciate him and trust him implicitly. He's very thorough and he's been providing me with excellent care for a number of years. Thank you.

  2026-06-05

• Dr. Clark is an amazing doctor. He saved my life and I can't say enough good things about him.

  2026-05-28

• Dr Clark is my second oncologist, after my first left MGH. He is attentive, thoughtful, a good listener and a compassionate physician. He has scheduled extra tests and a virtual consult. I came in for an annual cancer check-in - and lots of stress and anxiety. We are looking for solutions to those issues.

  2026-05-23

• Great work Great team

  2026-05-25

• Dr Clark is the best.

  2026-05-21

• Dr. Clark is the best He has been my oncologist for 32 years and has taken care of me through my entire cancer battle He literally saved my life, and I will always be grateful. Who ever has him for their doctor is truly fortunate. I followed him from [redacted] to Mass General and he has been my doctor ever since. Regards, [redacted]

  2026-05-13

• Dr. Clark is always attentive and provides clear guidance.

  2026-05-13

• My team is great!!!

  2026-05-11

• Dr. Clark was on time for me. I did not have to wait very long at all for him to come and to give me a checkup. So I'm very happy about that. And of course, he understands my current situation in every way. So I trust him completely and thrilled to have him. And I think that probably covers it for this interview. Thank you.

  2026-05-04

• He is the kindest doctor you could ever ask for.

  2026-04-22

• I always have a good experience. They are great

  2026-04-22

• Always attentive and empathetic. Always know he cares.

  2026-04-17

• I was very satisfied with the diagnosis and the conversations that the doctor and I had because I was allowed to ask the questions and he took the time to answer them in a way that I would understand.

  2026-04-13

• It was perfect Thank you

  2026-04-06

• Dr. Clark is wonderful, kind, and thoughtful. I feel so fortunate to have him for a doctor.

  2026-04-02

• Always listen and explains everything

  2026-03-30

• Dr Clark always listens to to me and my concerns. [redacted]

  2026-04-02

• He is a very cautious provider and he is excellent.

  2026-03-30

• Dr. Clark is exceptional. He is kind, compassionate and intellectually brilliant. He is engaging providing medical care.

  2026-03-28

• Dr. Jeffrey Clark is one of the most outstanding doctors. Dr. Clark is a person who has a high degree of knowledge, knowledgeable of many things, and is highly educated. He's also a very kind person, full of compassion and I try to tell patients as much as possible and he does the best for them. I'm so grateful.

  2026-03-27

• Absolutely very good doctor, caring, listens to you. Very, very good.

  2026-03-27

• always professional , competent and kind!

  2026-03-26

• The Dr listened to all the questions I asked and answered them so I could understand them

  2026-03-24

• Dr. Jeffrey Clark is outstanding. I always come away feeling that I am very fortunate to have such a wonderful doctor who understands my situation and gives me confidence that I am well. His comprehension of my particular issues provides me with comfort and knowledge that I am doing the right things to stay healthy.

  2026-03-23

• Very empathetic and kind.

  2026-03-18

• Dr. Clark is a wonderful doctor. I have every faith in his ability to care for me. He's very caring. He's very knowledgeable. He's very patient. He's very kind. I'm very grateful that I have Dr. Clark as my oncologist.

  2026-03-16

• Very competent and easy to communicate with. Answers all questions very clearly

  2026-03-09

• I like the attention they give to the doctor and everything, the communication, everything.

  2026-03-09

• Dr. Clark is exceptional. He's taken wonderful care of me. He listens, he comments, and he's always very understanding. He's excellent.

  2026-03-06

• Dr Jeffrey Clark has been my cancer oncologist since the summer of [redacted]. I saw Dr Clark as a second opinion. He explained everything to me and my family as to the treatment, office visits, follow up, etc. Dr Clark is always available to answer any questions that I have and explains everything in a way that I can understand. Our visits are not rushed. [redacted]

  2026-03-04

• Very kind and knowledgeable, provided the information we needed to make a decision. Extremely satisfied with the information we received.

  2026-03-05

• Dr Clark is proficient caring and professional as well as an expert I his field.

  2026-03-04

• I think he's extremely knowledgeable and very supportive. Always takes plenty of time to answer our questions.

  2026-02-28

• Dr Jeffrey Clark has carefully followed my cancer journey with me for 16 years and I'm so grateful now, and always. [redacted]

  2026-02-25

• EXCELLENT; OUTSTANDING.

  2026-02-25

• I feel Dr Clark is interested in my medical health but I would like more detailed information about results of all my testing

  2026-02-04

• Been seeing Dr Clark for over 20 years. Just excellent!

  2026-02-07

• 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.

  2026-01-30

• 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.

  2026-01-30

• 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.

  2026-01-17

• Easy to talk with. Good listener and very kind.

  2026-01-10

• 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.

  2026-01-05

• Very professional. Dr. Clark has been super to me. Can't say enough great things about him.

  2026-01-01

• Excellent doctor is very nice explain well

  2026-01-01

• Dr Jeffrey Clark is amazing!

  2025-12-25

• 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.

  2025-12-19

• 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.

  2025-12-15

• Extremely helpful, explained things that helped me understand what to expect. A pleasure to talk with.

  2025-12-12

• Dr. Clark is highly knowledgeable and well informed. I am very fortunate to benefit from his expertise and impressive knowledge.

  2025-12-11

• 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.

  2025-11-27

• Thanks

  2025-11-26

• Dr. Clark is extremely knowledgeable and always take the time to answer questions.

  2025-11-20

• Dr. Clark is an excellent doctor! He listens and spends the time you need in the office.

  2025-11-20

• 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.

  2025-11-20

• Dr. Clark is beyond the best!

  2025-11-17

• 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.

  2025-11-17

• Very kind and thorough provider, has called me at each hospitalization no matter where I am.

  2025-11-07

• I have never experienced any kind of bad treatment. Has been very knowledgeable and shows concern in my care.

  2025-11-05

• 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.

  2025-11-07

• Doctor Clark and him nurse and staff are all nice and very helpful and listen to me I am very happy with them .

  2025-11-02

• Dr. Jeffrey Clark is an excellent doctor. I'm very happy with him.

  2025-10-31

• 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.

  2025-10-29

• 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.

  2025-10-30

• Warm and caring, thorough and thoughtful- he took the time to explain everything and answer questions

  2025-10-27

• 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.

  2025-10-21

• 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.

  2025-10-06

• I'm very happy as a patient at mass general

  2025-10-07

• 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.

  2025-09-29

• Dr. Clark is the best. So knowledgeable and caring.

  2025-09-24

• Very good

  2025-09-22

• 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.

  2025-09-22

• Dr Clark is the best

  2025-09-20

• Dr Clark is knowledgeable, friendly and proficient. Trust him completely.

  2025-09-15

• As always perfect

  2025-09-08

• 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.

  2025-08-30

• 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.

  2025-08-28

• 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.

  2025-08-28

• Prompt and professional.

  2025-08-28

• 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.

  2025-08-18