Michael Thiim, MD

Michael Thiim, MD

Not currently accepting new patients

4.753642 average rating from 151 patient reviews

Specialties

Affiliation

Mass General Brigham

Provider Locations

  • Danvers, MA
  • Boston, MA

Michael Thiim received his BA at Ithaca College and MD from the State University of New York at Stony Brook. He completed a residency in Internal Medicine, a fellowship in Gastroenterology at St. Luke’s Hospital in New York City and a second fellowship in Hepatology at The Mount Sinai Medical Center, also in New York City.

Dr. Thiim was a member of the Senior Staff at Lahey Clinic where he served as the Medical Director of the Liver Center and as the Gastroenterology Fellowship Co-Director before joining the faculty of the Harvard Medical School and the MGH Gastrointestinal Unit in 1999. He has more than 25 years experience treating patients with liver conditions including cirrhosis, complications of liver failure, autoimmune liver diseases and viral liver diseases. He is an active member of the Mass General liver transplant program. Part of his practice is also devoted to general gastroenterology and endoscopy.

Dr. Thiim is actively engaged in medical education and he works with the MGH Internal Medicine Residency program as the Gastroenterology and Hepatology subspecialty education coordinator. Within the MGH Gastroenterology unit he teaches GI and Transplant Liver fellows in both the Gastroenterology and in the Liver Transplant Fellowship programs.

Education & Training

  • Fellowship: Mount Sinai Hospital Medical Center, Hepatology, 1994
  • Fellowship: St. Luke's Roosevelt Hospital Center, Gastroenterology, 1993
  • Residency: St. Luke's Roosevelt Hospital Center, Internal Medicine, 1991
  • Medical Education: Renaissance School of Medicine at Stony Brook University***, 1988

Board Certifications

  • Gastroenterology, American Board of Internal Medicine

Languages Spoken

  • English

Age Group Treated

  • Adults

Patient Feedback

4.753642 average rating from 151 reviews

  • Dr Thiim was very down to earth and easy to understand...some Doctors can be very clinical and talk above my medical knowledge. Very easy to converse with.

    2026-09-01

  • He is monitoring where I stand health wise at this moment and has a game plan as to how we should proceed which I appreciate.

    2026-08-30

  • Dr. Thiim is the best Dr. Very caring and supportive. Takes time and listens to all my concerns. I have complete faith and confidence in him.

    2026-08-20

  • Dr Thiim was tremendous

    2026-08-20

  • I felt very cared for.

    2026-08-19

  • Dr Thiim talks to me and answers my questions about my gastrointestinal issues in a very clear manner and helps me better understand how my body functions. He is very patient and always makes me feel at ease.

    2026-08-13

  • Well spoken and look forward to my next visit

    2026-08-12

  • My wife and I are very thankful that we have such a knowledgeable, caring doctor.

    2026-08-12

  • He is a wonderful doctor and he cares for his patients.

    2026-08-12

  • Wonderful appointment very informative

    2026-08-05

  • Dr. Thiim is very knowledgeable and helpful.

    2026-07-17

  • Dr. Thiim spent a lot of time with me. He listened carefully to what I had to say. He was very good and I look forward to my next meeting with him.

    2026-07-17

  • Dr. Thiim is a rock star. He listened, he diagnosed, and he follows up.

    2026-07-17

  • Dr. Thiim is excellent. I am very lucky to be able to see him.

    2026-07-15

  • Excellent provider. Feel listened to and cared for.

    2026-06-18

  • I think Dr. Thiim is very knowledgeable and I feel I know how rushed all the providers are. I would have liked to have spent more time with him on the phone trying to understand why this is happening to my body and have him coordinate better with my oncologist to help me not live in this agony.

    2026-06-10

  • We appreciate Dr. Thiim. We have had him as a provider for many years and feel fortunate.

    2026-05-31

  • Very warm, accommodating & helpful. So sincere plus gives ready advice.

    2026-05-28

  • Dr Thiim is very knowledgable, professional and very very empathetic.

    2026-05-28

  • Smooth great front desk folks and Dr was incredible.

    2026-05-25

  • He is very respectful and honest by any questions I may have. He is very thorough and explains what needs to be done when it comes to my medical issues.

    2026-05-22

  • Dr. Thiim is the best!

    2026-05-22

  • Very kind

    2026-05-13

  • Excellent doctor! I've been seeing him annually for over 20 years. I very much trust in his expertise. He's empathetic and friendly, and competent and reassuring.

    2026-05-10

  • Dr Thiim is so thoughtful and asked a lot of questions. He clearly wanted to be of help to me

    2026-05-06

  • I like Dr. Thiim's upbeat manner ...he is direct and very informed.

    2026-05-08

  • I am grateful that Dr. Thiim was able to help me with my hepatitis. [redacted]

    2026-04-22

  • Dr. Thiim is a wonderful doctor, has always listened to my concerns, explains everything very clearly, and I can't imagine anyone else giving me the kind of care that Dr. Thiim gives me. I just give him the best recommendation ever.

    2026-04-24

  • I feel very confident and comfortable with the care and recommendations from Dr Thiim.

    2026-04-23

  • Always have an excellent experience with the care provider

    2026-04-15

  • Dr. Thiim is an exceptional doctor. He truly cares, listens, and is very kind. I have the utmost respect for Dr. Thiim and I am so thankful he is my doctor.

    2026-03-25

  • He's pretty good, punctual. Tells it how it is.

    2026-03-27

  • Dr. Thiim is an amazing doctor. I'm always happy with my visits. He explains things so well. He's very professional and phenomenal. I'm happy that I've been going to him the last few years.

    2026-03-26

  • Explains in a way I can understand what is being said. Listens intently. Very professional and demonstrates concern and compassion.

    2026-03-20

  • I am grateful to have Dr. Michael Thiim as my doctor. He is extraordinary. He has an amazing repour with his patients. Not only is he highly qualified, but his demeanor is exceptional. Extremely fortunate to have him as a provider. [redacted]

    2026-03-18

  • I highly recommend Dr. Thiim. He is just the best in his field. I feel very, very comfortable and safe in his care. I trust him completely. He explains everything very well. He listens to me very well. And I have only wonderful things to say about him. So consider this a five-star number 10 review because he's the best. Thank you.

    2026-03-13

  • I am very comfortable with Dr Thiim, and I trust his expertise. Really, I just like him.

    2026-03-06

  • Dr. Thiim and team provide care in a way that makes me feel valued and a part of the process; they are careful listeners who are sincere in their care. Dr. Thiim is very respectful and caring.

    2026-03-05

  • Seen timely and the doctor spent more time than I expected listening to and reviewing symptoms and concerns, and he was clear in explaining possible approaches and medications.

    2026-02-26

  • Dr. Thiim and his team have been excellent. They are all courteous, respectful, and knowledgeable. He takes the time needed to thoroughly explain items to his patients, and his care has been life changing.

    2026-02-25

  • Hi, Dr. Thiim was very good. He spent all the time I needed with him, went over the whole scan that I was given. And yeah, he was great.

    2026-02-06

  • Dr. Thiim was knowledgeable, professional and friendly. I would highly recommend him to friends and family.

    2026-02-05

  • Dr. Thiim is the best!

    2026-01-30

  • Dr. Thiim is extremely helpful in interpreting my blood tests, MRI, and ultrasound so I can understand what the results indicate and their implications for future monitoring.

    2026-01-21

  • Excellent .

    2025-12-25

  • Very knowledgeable, caring and to the point...

    2025-12-24

  • He was calm respectful I never felt rushed. I was very comfortable to be upfront with issues and concerns and he discussed all. Very thorough

    2025-12-24

  • Courteous and attentive.

    2025-12-21

  • Excellent doctor. Engaging and informative

    2025-12-16

  • Great experience.

    2025-12-16

  • I have been with Dr Thiim for 15 years. He is a wonderful doctor who always puts me at ease.

    2025-12-16

  • Appointment was on time, covered all necessary questions and/or issues, and Dr. Thiim explained my health issue and treatment in a clear and concise manner. He is a true gentleman and professional and I would recommend him to my family and friends should they need a gastroenterologist.

    2025-12-04

  • I was treated with the upmost dignity and respect.

    2025-11-26

  • Dr. Thiim is absolutely wonderful and I would recommend him to anyone.

    2025-11-21

  • I appreciate Dr. Thiim's knowledge and comforting and pleasant manner.

    2025-11-20

  • I am very happy with my experience with Dr. Thiim. He was very attentive and explained everything to me in detail. He took his time to address any questions and/or concerns I had.

    2025-11-05

  • Dr. Thiim always makes time to listen and respects my opinions.

    2025-10-23

Accepted Insurance

  • Wellpoint
  • TriCare
  • Blue Cross Blue Shield
  • Medicaid RI
  • Medicaid NH
  • Medicaid ME
  • Multiplan
  • Aetna
  • WellSense
  • MassHealth
  • WellSense NH
  • Humana
  • Maine Community Health Options
  • Blue Cross Blue Shield - Indemnity
  • Railroad Medicare
  • Blue Cross Blue Shield Medicare
  • Mass General Brigham Health Plan
  • Coventry
  • Beech Street
  • United Health Care
  • Tufts Medicare Preferred
  • Harvard Pilgrim Health Care
  • Medicare
  • Fallon Health
  • Commonwealth Care Alliance
  • Medicare ACO
  • Tufts Health Plan
  • Cigna
  • Senior Whole Health