
Highlights
Age Groups Seen
- Adults
- Geriatrics
Languages
- English
Gender
MaleLocations
- Massachusetts General Gastroenterology Clinic
- 52 Second Avenue, Blue Building, Suite 3100, Waltham, MA 02451
- Get Directions
- phone: 617-726-2426
- fax: 781-724-5996
- Massachusetts General Gastroenterology Associates
- 55 Fruit Street, Building 5, Boston, MA 02114
- Get Directions
- phone: 617-726-2426
- fax: 617-724-5997
Expertise
Education
- Fellowship: Massachusetts General Hospital, Gastroenterology, 2011
- Residency: Massachusetts General Hospital, Internal Medicine, 2006
- Internship: Massachusetts General Hospital, Internal Medicine, 2005
- Medical Education: Columbia University College of Physicians & Surgeons, 2004
Board Certifications
- Gastroenterology: American Board of Internal Medicine, 2010
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 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
87 ratings, 40 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
Dr. Carolan was knowledgeable, friendly, respectful, kind. Very much enjoyed my visit with him and I'm glad I selected him.
- Reviewed on 1/25/2026
Dr. Carolan has been great to work with. Treats patients like people, friendly, respectful and honest, easy to talk to, listens and offers honest advice and perspectives, direct but not judgemental. Very pleased with his care. (If this sounds like a bot.. it's not. I'm a sales & service manager and write reviews for my employees twice a year on the quality of their client care.)
- Reviewed on 11/28/2025
This doctor is really, he's just absolutely excellent. I feel so comfortable and he takes so much time and just really has a nuanced approach. So extremely grateful that I'm seeing him for my care.
- Reviewed on 11/23/2025
Dr Carolan is top notch. He's smart, friendly, engaging, and professional. He listens, he explains, he's respectful... everything you want in a medical professional.
- Reviewed on 11/19/2025
Dr. Carolan was very thorough, very professional, gave me plenty of time to ask questions to clarify the procedure that I'm going to be going through. I was more than happy with him.
- Reviewed on 11/17/2025
Dr. Carolan exceeded all expectation
- Reviewed on 11/10/2025
Quite knowledgeable
- Reviewed on 11/8/2025
Love the doc
- Reviewed on 11/5/2025
The doctor and staff were fantastic.
- Reviewed on 11/3/2025
great listener and good advice and review of bloodwork very efficiently.Made good suggetions .
- Reviewed on 10/29/2025
Very good. Very good.
- Reviewed on 10/26/2025
Caring, Knowledgeable, Sincere
- Reviewed on 10/18/2025
Fantastic experience; thank you so much!!
- Reviewed on 10/1/2025
As usual, very knowledgeable and professional
- Reviewed on 10/1/2025
Kind and efficient
- Reviewed on 9/28/2025
Dr. Carolan was fantastic. In a perfect world, every doctor would be like Dr. Carolan.
- Reviewed on 9/26/2025
I was very pleased with Dr. Carolan, but I'm displeased with how long this questionnaire is taking. It's getting very frustrating. Just about anything I do, I have to go through afterwards. Actually, I don't have to go through it. I'm doing it because I like Dr. Carolan, but this is very annoying how long this questionnaire is. Thank you very much.
- Reviewed on 9/25/2025
I trust Dr. Carollan completely with my care. He is kind, attentive to my needs and cares about my whole health, not just his area of expertise. The entire staff and experience were very positive.
- Reviewed on 9/24/2025
Dr. Carolan is an excellent doctor. He's thorough, patient, and he allowed me to get an appointment as soon as possible for my urgent issue.
- Reviewed on 9/17/2025
I am delighted to be seeing Dr. Carolan and be able to have his leadership with my health issues.
- Reviewed on 9/12/2025
Dr. Carolan was very accommodating, very professional, very personal, and gave me all the information I needed and answered all my questions.
- Reviewed on 9/6/2025
Very personable and forthcoming.
- Reviewed on 9/4/2025
I was very comfortable with Dr. Carolan who was very thorough and accommodating to my requests. He was able to schedule tests quickly and just as quickly reported on the test results.
- Reviewed on 7/28/2025
Excellent and very good informative
- Reviewed on 6/12/2025
Treated with courtesy by all staff. Dr. Carolan listened to my concerns and answered my queries which gave me a better understanding of my issues.
- Reviewed on 6/8/2025
Very positive experience. I felt heard!
- Reviewed on 6/6/2025
Overall Dr. Peter Carolyn is the best for me
- Reviewed on 6/5/2025
I am very happy that I able le to see the Doctor, and very lucky that Doctor able to see me ! Feel I am in his good hand Thanks Doctor
- Reviewed on 6/5/2025
Dr. Carolan has been my doctor for a number of years. He is always well prepared, thorough and patient. In have total confidence in his care for me.
- Reviewed on 5/27/2025
Fantastic doctor this far. I recommend highly.
- Reviewed on 5/22/2025
It was very helpful, listened to try to figure out what my health problems are that nobody else seems to be able to figure out. And I feel very strongly that he's going to find the answer that I've been looking for.
- Reviewed on 5/8/2025
He's been my doctor for 15 years and always gave me excellent care and advice and recommendations applicable to my unpleasant issues.
- Reviewed on 5/7/2025
Dr. Carolan was great. Was impressed the way he listened to my concerns. Not many do that!
- Reviewed on 5/3/2025
It's very pleasant and willing to listen to anything you want to say, and remark on it with an answer
- Reviewed on 5/1/2025
Listened carefully to what I had to say and offered suggestions on how to proceed.
- Reviewed on 4/24/2025
I was completely satisfied with the visit. The doctor was fantastic and best general. My experience in every floor with every doctor has been utterly fantastic. Thank you.
- Reviewed on 4/21/2025
Dr Peter Carolan made me feel very comfortable. He is very knowledgeable and compassionate. I highly recommend him.
- Reviewed on 4/16/2025
The whole faculty, the staff, everybody was fantastic. Even the doctor was fantastic. Thank you and have a lovely evening. Bye.
- Reviewed on 4/14/2025
For the first time in the 5+ years that I've been suffering with my condition, Dr Carolan has been the first and ONLY physician who has taken the time to listen and and HEAR me. He expressed this, not only through his responses and questions, but I could see his concern in his facial expressions and his body language. That has never happened before. Never. I literally broke down into tears at the end of the appointment because I finally felt like I found the doctor who was going to help me. (I'm actually crying whilst typing this because the mental relief I finally feel is overwhelming). I am beyond grateful for Dr Carolan and look forward to continuing to be a grateful patient.
- Reviewed on 4/8/2025
The doctors listens to me and understands my needs