Joshua R Korzenik, MD
Not currently accepting new patients
4.94188 average rating from 117 patient reviews
Specialties
Affiliation
Mass General Brigham
Provider Locations
- Chestnut Hill, MA
Education & Training
- Fellowship: Yale University School of Medicine, Internal Medicine (Digestive Diseases), 1994
- Residency: Beth Israel Deaconess Medical Center, Internal Medicine, 1990
- Medical Education: Albert Einstein College of Medicine, 1987
Board Certifications
- Gastroenterology, American Board of Internal Medicine
Languages Spoken
- English
Age Group Treated
- Adults
Patient Feedback
4.94188 average rating from 117 reviews
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Excellent care and great understanding to what my concerns were!
2026-08-19
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He's thoughtful a d conscientious
2026-07-28
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Dr. KORZENIK is so thorough and smart and detailed and makes you feel like he has all day to spend with you, like literally never rushes you on anything and he just obviously really cares about his patients, which is something that doctors don't seem to have time to do anymore and makes you feel safe and cared about and yeah, literally he is the best.
2026-07-16
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Dr Korzenik has followed me for over 20 years and I couldn't have a better doctor. He is compassionate, attentive, extremely knowledgeable, sharing his expertise generously
2026-07-14
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I have been seeing this doctor for over 20 years. He is the most knowledgeable, empathetic, knowledge sharing within multiple fields and listener. How can I learn to take care of myself if the medical person does not share or share. He is the absolute best within my many fields of medical problems I have. Thank you Dr. K
2026-07-10
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Perfect!
2026-07-01
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Dr. Korzenik and the care team were my trusted healthcare partners over the years. I am lucky to have access to their expertise and care.
2026-06-30
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Dr. Korzenik is one of the finest doctors that I've ever dealt with and I've dealt with hundreds, literally. I think his office is extremely well run and he is, I just couldn't recommend anybody more highly. Thank you.
2026-06-10
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He's kind, patient & very thorough.
2026-06-07
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Dr Korzenik is a Great Doctor! He treats his patients work the best care
2026-06-04
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I was there for a gastroenterology visit, but Dr. Korzenik also reviewed my recent labs and noticed that my renal function might possibly have issues. And so he ordered a whole renal panel, and it turns out that maybe I do have such problems, and I'm really grateful that he did that. [redacted]
2026-05-29
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When you see Dr Korzenik, he is present 100%, he listens to what you have to say and hears you.
2026-05-27
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Visits feel too short.
2026-05-08
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I truly appreciate how Dr K is always helpful when I need his input if I'm not feeling well with my Crohns. If I'm at an ER they reach out to him and he always seems to respond timely to help with my treatment. He has been a great asset to my health team. I know how busy he is, so I'm grateful he is my Dr.
2026-05-07
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Dr. Joshua Korzenik is an excellent doctor with a really high level of professionalism, kindness and patience. I'm very confident that I receive the best available care.
2026-05-08
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Dr. Korzenik always explains everything in a manner that it easy for me to understand. This includes the current and previous appointments. I have been a patient of Dr. Korzenik for many years and exceptionally grateful that he is a part of my entire medical team.
2026-04-29
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I have been a patient of Dr Korzenik for many years... Dr Korzenik if a first class gentleman... Top notch when it comes to my colitis treatment... I have complete confidence in him... no one better than Dr Korzenik
2026-04-29
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Great bed side magnet. Thorough exam and friendly.
2026-04-22
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Dr Korzenik explained options on different medications an discussed the pros and cons of ofthesd medications
2026-04-08
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He listened to me. And he was almost on time.
2026-04-08
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Dr. Korzenik is extremely informative. He performs his job with professional excellence [redacted]
2026-04-03
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Joshua Korzenik is an exceptional physician and person. I've seen Josh now for 18 years, and without a doubt I am always so grateful to [redacted] be under his care. He is the best of the best.
2026-04-01
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Dr. Korzenik is an incredible doctor. He's kind, thorough, helpful, and a great communicator. I trust him and am very grateful to have him as my doctor.
2026-03-19
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Best MD I've ever had.
2026-03-19
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I have seen Dr. Korzenik for multiple decades. He is a talented and personable physician who has taken great care of me. I would highly recommend him to anyone.
2026-03-11
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Great doctor but it takes too long to get appointments.
2026-03-05
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Excellent doctor. Thorough, knowledgeable, and easy to talk to.
2026-02-26
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I am extremely satisfied with my experience with my gastroenterologist, Dr.Joshua Korzenik and his staff who are very professional and experienced which makes me feel very confident and well cared for every time I visit their office.
2026-02-26
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Very professional and kind
2026-02-20
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Very great doctor
2026-02-19
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DR. Korzenik demonstrates his genuine concern for my health. He is proactive in working with other doctors to make sure that every aspect of my care is well coordinated. He knowledge on the subject matter is outstanding.
2026-02-26
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Dr Korzenik is outstanding. We engaged in conversations That made me feel seen, valued and heard
2026-02-24
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I just would like to say that Dr. Korzenik is always very helpful. He listens to me. He explains things when I have questions. I never feel rushed. He's very personable and friendly and always asks how my family is and what I'm doing outside of my health and I appreciate that immensely. Thank you.
2026-02-06
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Dr Korzenik is caring, attentive to my concerns and provides excellent advice and care. Can't ask for more in a treating doctor.
2026-02-06
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Could not be better!
2026-02-06
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Dr. Korzenik is one in a million. I feel incredibly fortunate to have him as a physician.
2026-02-04
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Best GI doctor in the world
2026-01-31
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I would just say that Dr. Korzenick is exceptional. He understands his patients extremely well. He understands his area of expertise extremely well. He's compassionate. He's empathetic. He's intelligent. He's the best.
2026-01-23
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I have been followed by Dr. Korzenik for over 20 years and feel very grateful for his expertise , care and concern.
2026-01-14
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Dr. Korzenik is the greatest doctor of all time. Everybody knows it. [redacted] He's truly the best doctor I've ever had. I feel so lucky to have him in my life and on my team. He has supported me and my health since I was young and I will truly appreciate him forever and ever.
2025-12-18
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I am very fortunate to have such a professional and caring person caring about my health. Dr. K is the best.
2025-12-18
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I think that Dr. Korzenik is a creative, kind, and skilled clinician. He is truly fabulous and I feel very fortunate to have him as my doctor.
2025-12-11
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He's the best
2025-12-11
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Dr. Joshua Korzenick is the most outstanding, wonderful doctor. He listens carefully. He follows up very, very thoroughly. He is extraordinary. I couldn't recommend him higher. My favorite doctor I've ever had.
2025-12-12
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He is probably my favorite doctor.
2025-12-11
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Dr. KORZENIK is an excellent listener & his responses/recommendations are very well thought out. I feel safe with him as a caregiver.
2025-12-11
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I have seen Dr. Korzenik for several years now and am very comfortable and confident with his treatment of my condition.
2025-11-20
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Dr. Korzenik is what every doctor should be- extremely knowledgeable, up to date with the latest research and medical trends, approachable and compassionate. I feel fortunate that he's part of my medical team.
2025-11-19
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Dr. Korzenik and his staff are excellent.
2025-10-30
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Dr. Korzenik is the best. As always my experience was productive and very thorough.
2025-10-29
Accepted Insurance
- Tufts Medicare Preferred
- Wellpoint
- Blue Cross Blue Shield Medicare
- Cigna
- Mass General Brigham Health Plan
- Tufts Health Plan
- Beech Street
- Commonwealth Care Alliance
- Multiplan
- Medicaid NH
- Blue Cross Blue Shield
- MassHealth
- United Health Care
- Senior Whole Health
- Coventry
- Aetna
- Medicare
- Medicaid CT
- Fallon Health
- Railroad Medicare
- Humana
- Medicaid ME
- WellSense
- TriCare
- Harvard Pilgrim Health Care