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John Bertrand Cadigan

John Bertrand Cadigan, MD

Cardiology

Highlights

Age Groups Seen

  • Adults
  • Geriatrics

Languages

  • English

Gender

Male

Locations

  1. Brigham and Women's Cardiology Clinic

Expertise

Education

  • Fellowship: Boston Medical Center (BMC), Cardiology, 1986
  • Residency: Boston City Hospital - Bu Medical Center, Medicine, 1984
  • Medical Education: Boston University School of Medicine, 1981

Board Certifications

  • Internal Medicine: American Board of Internal Medicine, 1987

Insurance

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

Ratings & Reviews

4.9 out of 5

391 ratings, 176 reviews

The 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.

Search reviews
  • Reviewed on 4/6/2026

    Dr Cadigan listened to everything I said and developed a plan to address all of my concerns. He prescribed a series of tests to thoroughly validate whether or not prescription medicine is needed.

  • Reviewed on 4/5/2026

    Very pleased to be a patient with Dr Cadigan.

  • Reviewed on 4/6/2026

    Excellent care

  • Reviewed on 4/5/2026

    Listened attentively and answered all my questions. Explained things on matters I am not familiar with. Was not rushed and we had a fairly long visit.

  • Reviewed on 4/1/2026

    He is very nice

  • Reviewed on 3/31/2026

    Very caring and took time to explain everything!

  • Reviewed on 4/1/2026

    My wife and I were so impressed with the care and comfort we received especially with the news we received in needing bypass surgery. Feel so lucky to have the team of Physicians that have been put together as we move ahead with the Surgery.

  • Reviewed on 4/1/2026

    Yes, Dr. Cadigan is very professional and he is the best. Thank you.

  • Reviewed on 3/30/2026

    He was great. I would highly recommend him.

  • Reviewed on 3/26/2026

    It was excellent. I got no complaints [redacted].

  • Reviewed on 3/22/2026

    Dr. Cadigan is a skilled Cardiologist and I am fortunate to be his patient. I have complete trust in him.

  • Reviewed on 3/22/2026

    nothing at the moment except for a nurse followup I did not get a follow up appointment with Dr. Cadigan

  • Reviewed on 3/19/2026

    How healthy I was

  • Reviewed on 3/18/2026

    Dr. Cadigan is a consumate professional who takes the time to be caring and thorough.

  • Reviewed on 3/18/2026

    Dr Cadigan is a caring and thoughtful provider.

  • Reviewed on 3/18/2026

    Appointment went smooth And on time

  • Reviewed on 3/25/2026

    Dr. Cadigan is an excellent heart doctor.

  • Reviewed on 3/19/2026

    Dr. Cadigan was an extremely compassionate, empathetic, knowledgeable caregiver who put me at ease and inspired confidence in my future care.

  • Reviewed on 3/19/2026

    Dr. Cadigan was very thorough, knowledgeable, and understanding, very professional, gave me plenty of time to discuss the situation. Highly recommended.

  • Reviewed on 3/14/2026

    Dr Cadigan was terrific. He always speaks to me candidly about my cardiac health. He is very easy to speak with.

  • Reviewed on 3/12/2026

    Dr Cadigan is excellent: experienced, asked good questions, was a good listener, was proactive and had a good patient manner.

  • Reviewed on 3/11/2026

    I had a very nice visit with Dr CADIGAN. He was kind, efficient, thorough and took the time to explain things

  • Reviewed on 3/12/2026

    Everyone I spoke with were very friendly and respectful. Made me feel very comfortable.

  • Reviewed on 3/12/2026

    Care outstanding

  • Reviewed on 3/12/2026

    He seemed very thorough and I was impressed by how much time we had. I appreciated the amount of time he spent.

  • Reviewed on 3/7/2026

    knowledgable

  • Reviewed on 3/6/2026

    It's my first visit to a cardiologist, and it was excellent. I'm so glad I did and that I chose Dr. Cadigan. He was great, definitely someone I can work with. He listened, he reassured, and he didn't push gave his recommendations based on expertise and facts, while adapting to my concerns and my way of handling my own health.

  • Reviewed on 3/5/2026

    Good very pleasant and explained things well.

  • Reviewed on 3/4/2026

    Excellent care and patience

  • Reviewed on 3/5/2026

    Happy and great experience

  • Reviewed on 3/4/2026

    Outstanding.!!!! So special

  • Reviewed on 3/7/2026

    nothing everything as fine

  • Reviewed on 3/4/2026

    excellent doctor

  • Reviewed on 3/1/2026

    I appreciate the way he listened, and explained any thing I was concerned about, great doctor

  • Reviewed on 2/26/2026

    I was a returning patient to the doctor. He was just as wonderful as I remember him. He really listened and cared about what I had to say.

  • Reviewed on 2/22/2026

    Great!

  • Reviewed on 2/18/2026

    Excellent

  • Reviewed on 2/18/2026

    It was my first time meeting him and he seemed well informed about heart issues and high blood pressure. I was pleased with the appointment

  • Reviewed on 2/16/2026

    Dr Cadigan is always professional and willing to listen to any questions from patients. He is the best

  • Reviewed on 2/17/2026

    Always a pleasure to visit the office.

  • Reviewed on 2/16/2026

    I really am very happy with him.

  • Reviewed on 2/14/2026

    Dr. Cadigan is a great doctor, I would definitely recommend him.

  • Reviewed on 2/12/2026

    Dr. Cadigan is very knowledgeable and he is able to explain his thought process as it relates to his care of you. He listens and is engaging. I feel comfortable and confident that he is giving the best possible care as it relates to my heart issues. Grateful he is my cardiologist.

  • Reviewed on 2/11/2026

    Dr Cadigan was thorough and I learned from him as he walked through my options. He was open to discussing alternatives in my care plan and I felt heard.

  • Reviewed on 2/27/2026

    High level concern for my condition.

  • Reviewed on 2/10/2026

    He is very thorough, inquisitive and friendly.

  • Reviewed on 2/10/2026

    I always enjoy visiting Dr. Cadigan. I find that he is very thorough and detailed, and that's not true of all doctors.

  • Reviewed on 2/8/2026

    I didn't feel rushed at all, and he answered everything I needed to know for me

  • Reviewed on 2/8/2026

    I love Dr Cadigan, he actually listens and explains things fully.

  • Reviewed on 2/6/2026

    Dr. Cadigan was wonderful. He was patient and listened to my concerns. He gave me great feedback, recommended a couple of tests for me to follow through with, and I left there feeling extremely comfortable and happy with my visit. In addition, I had a great sense of relief after leaving there and feeling like he was a wonderful doctor.

  • Reviewed on 2/6/2026

    Yes, he was on time, very courteous and helpful, and I'd recommend him to everyone. [redacted]

  • Reviewed on 2/5/2026

    Dr. Cadigan was very kind and explained his rationale and suggestions in an easy to understand manner.

  • Reviewed on 2/4/2026

    He is my the best cardiologist who take care of my health and all medication and tests on time . He is life saver and I have very confidence on his judgement for better healthy life . Thanks

  • Reviewed on 2/4/2026

    Dr. Cadigan is wonderful.

  • Reviewed on 2/4/2026

    This provider is excellent. I have a lot of confidence in him.

  • Reviewed on 2/2/2026

    Explain what the next steps were going to be want to look for and what to do if X or Y happen, do not wait to collect $200.00 just go straight to the hospital.

  • Reviewed on 2/1/2026

    Works diligently to try to improve my health

  • Reviewed on 1/29/2026

    Dr. Cadigan is amazing. He's always so wonderful, understanding, and professional, and he immediately addresses any issue with confidence and executes immediately. He's the best, and I'm very fortunate to have Dr. Cadigan as one of my doctors. Thank you.

  • Reviewed on 1/25/2026

    Dr John Cadigan 111 is excellent orders testing when needed reviews medication every visit and makes adjustments when needed

  • Reviewed on 1/14/2026

    I have been going to this doctor for a couple of years and do like him

  • Reviewed on 1/14/2026

    Dr Cadigan was obviously an expert in his job, and I've been a cardiology patient for over 60 years.

  • Reviewed on 1/11/2026

    I was totally impressed by Dr Cadigan calling me the next day regarding a medication I was taking and finding a different medication that would be preferable for me.

  • Reviewed on 1/14/2026

    Dr. Cadigan was very professional, has a great personality. I rank him a 10.

  • Reviewed on 1/10/2026

    I satisfied with the medical team's care and kindness.

  • Reviewed on 1/9/2026

    Being my first visit with him I was very satisfied

  • Reviewed on 1/8/2026

    Dr Cadigan listened to me talk about my concerns after my heart valve replacement. He is a caring doctor and listens He offers good suggestions

  • Reviewed on 1/8/2026

    Excellent care provider, spent a sufficient amount of time, very understanding, very compassionate, and very thorough, and very knowledgeable in his field.

  • Reviewed on 1/7/2026

    Excellent overall care

  • Reviewed on 1/6/2026

    He is always caring and helpful. He explains everything thoroughly.

  • Reviewed on 12/26/2025

    He seems very knowledgeable and

  • Reviewed on 12/22/2025

    Pleasant. Professional. Trustworthy.

  • Reviewed on 12/22/2025

    I was lucky I had an appointment with him and he sent me into the hospital. He might have saved my life.

  • Reviewed on 12/20/2025

    Dr Cadigan is very thorough and respectful. He explains things so that it is clear to understand.

  • Reviewed on 12/17/2025

    Yes, he was very nice. I've seen him before and I would go back to him and I would recommend him to anybody. And I did see a nurse because she did an EKG on me and then she did my vitals and everything was fine. So I was very happy.

  • Reviewed on 12/16/2025

    Well informed competent caring physician

  • Reviewed on 12/16/2025

    Dr. Cadigan is a very knowledgeable, caring, thoughtful, great listener, and I feel that he provides the utmost best in health care. I appreciate having him as my cardiologist.

  • Reviewed on 12/11/2025

    Dr. Cadigan was so incredibly kind and he made me feel like he really cared. I was seeing him for the 1st time to get a second opinion. I cancelled all future appointments with the old doctor and will continue to see Dr. Cadigan as he has earned my trust

  • Reviewed on 12/9/2025

    Dr. Cadigan is great and takes time to explain everything.

  • Reviewed on 12/9/2025

    I find Dr. Cardigan very kind and caring. I did have some questions and he answered them in a thorough way.

  • Reviewed on 12/8/2025

    It's always a pleasure to see Dr. Cadigan. I have been a patient of his for many years, and I am immediately put it ease and know that he has my best interest in mind. He is prepared for the appointment and has reviewed my blood tests and lab tests that have been done and is familiar with the results in advance of the appointment. He is an excellent provider.

  • Reviewed on 12/2/2025

    Very happy with all aspects of the visit

  • Reviewed on 12/1/2025

    Listened to my concerns and did not rush me

  • Reviewed on 12/2/2025

    Great experience

  • Reviewed on 12/1/2025

    Excellent

  • Reviewed on 11/26/2025

    Dr. Cadigan is great! Very thorough and explains things clearly.

  • Reviewed on 11/26/2025

    I feel I am in great hands with Dr. Cadigan as my cardiologist.

  • Reviewed on 11/27/2025

    explained things so that I could understand them

  • Reviewed on 11/24/2025

    I don't like weighing in. I work very hard to lose 14 pounds, and I get weighed with street clothes and I'm 5 pounds heavier than my real weight.

  • Reviewed on 11/23/2025

    Don't let him get away.

  • Reviewed on 11/23/2025

    I know a series of "best" responses doesn't give you much to work with, but it really is an outstanding experience. Building is easy to access, waiting room is comfortable, seen relatively on-time, treated with respect and feel heard, attentive and informed nurses and doctors... there's not much more I could ask for!

  • Reviewed on 11/22/2025

    Dr Cadigan is great and caring. I'm lucky to Have him as my provider

  • Reviewed on 11/15/2025

    Execlent Doctor

  • Reviewed on 11/13/2025

    Great

  • Reviewed on 11/13/2025

    Dr. Cadigan is great. He is very knowledgeable and kind. I hope he never retires.

  • Reviewed on 11/13/2025

    Everything was great. I MADE A MISTAKE. i SAW A TECHNICAN , NOT A NURSE . She was great.

  • Reviewed on 11/11/2025

    Thorough, thoughtful and didn't make me feel like I was on the clock

  • Reviewed on 11/12/2025

    He was absolutely phenomenal. He listened to every single thing and he helped me understand what's going to come in the future for me with INR and he got me into the coagulation clinic. He was just unbelievable and he is just a fabulous, fabulous doctor.

  • Reviewed on 11/10/2025

    Very nice visit!

  • Reviewed on 11/9/2025

    Dr Cadigan did an excellent job in getting to know my medical background as this was my first visit. I am glad I choose an excellent physican.

  • Reviewed on 11/6/2025

    I thanked him for accepting me as a patient....and meant it.

  • Reviewed on 11/6/2025

    Meeting with Dr. Cadigan was one of the most positive medical experiences of my life. I recently found out that I have severe coronary disease. Dr. Cadigan met with me and explained in detail what the immediate next steps would entail. Of equal importance, my wife was present and he listened and answered any of our questions. While he did not minimize the seriousness of my condition, he presented viable plans that put me more at ease--as well as my wife.

  • Reviewed on 11/5/2025

    Was very impressed with him. He listened to me and answered all my questions. Also explained everything in language I could understand. I need 2 tests which he also explained.

  • Reviewed on 11/5/2025

    Great

  • Reviewed on 11/3/2025

    Dr. Cadigan is always kind and knows my medical history. He explains everything and answers all my questions.

  • Reviewed on 11/2/2025

    Excellent visit

  • Reviewed on 11/1/2025

    Very knowledge

  • Reviewed on 11/1/2025

    Thorough and friendly..

  • Reviewed on 10/29/2025

    first appointment with new Doctor was very pleased

  • Reviewed on 10/25/2025

    Was very caring

  • Reviewed on 10/25/2025

    Dr Cadigan is a wonderful doctor. I have been his patient for many years. I respect his medical advice and find him to be very knowledgeable and friendly. We discuss various options and I would highly recommend him.

  • Reviewed on 10/14/2025

    As always, my visit with Dr. Cadigan was entirely satisfactory, with questions answered and explanations about my condition.

  • Reviewed on 10/11/2025

    Dr. Cadigan was very thorough and thoughtful. I particularly appreciated his phone call to inform me of a test result.

  • Reviewed on 10/8/2025

    Dr Cadigan is a wonderful Dr. [redacted]

  • Reviewed on 10/4/2025

    Great professional care

  • Reviewed on 10/1/2025

    Excellent dr.

  • Reviewed on 10/1/2025

    Great! Reason for mostly on getting appointment was that I had surgery the day of my follow-up with Dr Cadigan.

  • Reviewed on 10/3/2025

    As a long time patient I feel I'm dealing with the best.

  • Reviewed on 9/28/2025

    Great service and a great Doctor.

  • Reviewed on 9/28/2025

    Always enjoy office visits Westwood has the best team of professionals.

  • Reviewed on 9/26/2025

    I trust him

  • Reviewed on 9/24/2025

    Very difficult to get an appointment with Dr. Cadigan, (must book one year out) but once I saw him he knew my history and made great decisions.

  • Reviewed on 9/17/2025

    Dr. Cadigan was extremely knowledgeable about cardiac issues that I experience, and provided good insight on a plan to address them. He gave me confidence that he would help me avoid issues.

  • Reviewed on 9/17/2025

    Dr Cadigan is wonderful! Always listens always a pleasant experience

  • Reviewed on 9/17/2025

    Thorough

  • Reviewed on 9/17/2025

    Dr. Cadigan was very professional. He took the time to explain to me exactly what was happening, something that no doctor that I've seen in the ER were able to do. As soon as he saw my EKG results, he knew exactly what was happening and the reason why I was seeking to see a cardiologist. I am extremely happy with his service. He is very, again, very professional. took the time, he really listened to all my concerns and he was able to answer all my questions. And he recommended some tests that provided a lot of information, the results provided a lot of information.

  • Reviewed on 9/13/2025

    Dr. Cadigan was very friendly, attentive, and informative.

  • Reviewed on 9/10/2025

    This was my first time seeing this doctor. I am absolutely thrilled with him. He was very thorough! He was very kind and nice.

  • Reviewed on 9/10/2025

    I have full confidence in my cardiologist to provide my necessary future care based on his past care.

  • Reviewed on 9/10/2025

    Very pleased with Dr Cadigan. Knew my medical history

  • Reviewed on 9/10/2025

    fantastic doctor, couldn't have had a better visit

  • Reviewed on 9/7/2025

    Very professional, knowledgeable, and caring. I was listened to, and very helpful information was shared with me in simple terms.

  • Reviewed on 9/5/2025

    Dr Cadigan is the best! He is very caring and always listens to your concerns and makes you feel comfortable.

  • Reviewed on 9/5/2025

    I have the utmost confidence in Dr. Cadigan. He is knowledgeable, has a kind and reassuring manner, and provides you with the information you need.

  • Reviewed on 9/7/2025

    Dr. Cadigan is very knowledgeable and very personable, two things that are particularly important with a cardiologist, and he certainly listened to me with care, and I thought that was particularly impressive.

  • Reviewed on 8/28/2025

    Dr. CADIGAN is one of the best providers I've ever had. He has great knowledge. He's a very intimate man and he explains everything and how much he loves his job and helping people.

  • Reviewed on 8/28/2025

    Dr. Cadigan is always professional, understanding and explains what he believes is the best treatment plan for me to follow , on every visit .

  • Reviewed on 8/25/2025

    Excellent Cardiologist

  • Reviewed on 8/23/2025

    Outstanding Dr.

  • Reviewed on 8/20/2025

    Very good listener, on time, great doctor and professional staff

  • Reviewed on 8/18/2025

    Very pleasant , very knowledgeable, excellent listening skills. Read and studied my chart before my appointment.

  • Reviewed on 8/18/2025

    Dr. Cadigan is wonderful. He has a very welcoming personality and pays attention to your cocncerns. He explains everything in detail and gives you a feeling of confidence in the care he provides.

  • Reviewed on 8/17/2025

    Dr. Cadigan was very helpful in explaining to me questions that I had. He took his time so I understood. I feel very comfortable and confident being his patient. Everyone at his office was wonderful

  • Reviewed on 8/16/2025

    Explained more to me about my concerns than any other provider has.

  • Reviewed on 8/19/2025

    He was very patient, friendly and calming.

  • Reviewed on 8/11/2025

    I met this doctor & nurse the first time. They are great. I will recommed the doctor with his stuff in the case as mine.

  • Reviewed on 8/2/2025

    Dr Cadigan and his staff are exceptional in all areas from the check-in process to making a follow-up appointment.

  • Reviewed on 7/26/2025

    Very pleasant and takes the time to go over my medical issues

  • Reviewed on 7/23/2025

    Service was excellent and compasionate. Providers professional and knowledgable

  • Reviewed on 7/21/2025

    Dr Cadigan Listens well and patiently reviews my feedback

  • Reviewed on 7/21/2025

    First meeting with Dr Cadigan. Very positive feeling as a result of this consultation. Easy to speak to and covered all the questions I had.

  • Reviewed on 7/19/2025

    He is kind courteous and extremely knowledgeable

  • Reviewed on 7/19/2025

    I have been seeing Dr. Cadigan for many years. He has always been a thorough physician.

  • Reviewed on 7/18/2025

    listens ,explains, never rushes......always well informed

  • Reviewed on 7/16/2025

    Yeah, I doubt Cadigan is very thoughtful, understanding. Listen to my concerns. Addressed my questions fully. I highly recommend him.

  • Reviewed on 7/14/2025

    Dr Cadigan is professional, an astute listener and proactive in ordering the tests appropriate for my care. I'm always confident he's done a thorough chart review and up to date on my recent admissions and testing and able to make my visit more productive.

  • Reviewed on 7/9/2025

    One of the best experiences with him .very smart and outstanding performance during visit ??

  • Reviewed on 7/9/2025

    Dr. Cadigan is an excellent doctor, explains everything in easy, simplified terms, cares about me as a patient and a person, just a wonderful doctor.

  • Reviewed on 7/6/2025

    I like him very much.

  • Reviewed on 7/6/2025

    I had a good visit with Dr Cadigan He listened to my concerns and gave me as much time as needed. [redacted]

  • Reviewed on 7/2/2025

    They were excellent

  • Reviewed on 7/2/2025

    The technician who assisted at the beginning was most helpful and had a great sense of humor as well as informative.

  • Reviewed on 6/19/2025

    Excellent cardiologist

  • Reviewed on 6/22/2025

    Dr Cadigan was very informative, kind and conservative, I really liked him is was great!!

  • Reviewed on 6/19/2025

    The doctor was knowledgeable and professional.

  • Reviewed on 6/15/2025

    Dr Cadigan was attentive to what I had to say and was excellent discussing my needs

  • Reviewed on 6/14/2025

    Dr. Cadigan was very easy to talk to, listened, considered my in-put, was very knowledgeable. His manner was courteous, and warm. Both the history and exam were thorough. He said I should contact him, should I have questions before the next appointment, or, should experience side effects from a newly prescribed station. A follow-up appointment was scheduled for 3 months.

  • Reviewed on 6/14/2025

    Dr Cadigan is the best! He explains everything so that I completely understand and he listens to what my concerns are. I feel very confident and trust with having Dr Cadigan as my cardiologist. Thank you

  • Reviewed on 6/13/2025

    Dr. Cadigan is efficient, organized, intelligent, knowledgeable, kind, caring , and professional. Very personable and follows through with what he says he intends to do.

  • Reviewed on 6/11/2025

    Dr Cadigan is superb! He has been fantastic to work with! I could not be happier with his care!

  • Reviewed on 6/11/2025

    It was excellent

  • Reviewed on 6/9/2025

    Provider took time to listen to all my questions and answered them. He is very respectful and courteous, excellent cardiologist.

  • Reviewed on 6/8/2025

    Sent a message to Dr. Cadigan, office responded quickly and were able to offer me a cancellation appointment. Saw doctor within one day of sending message.

  • Reviewed on 5/29/2025

    Outstanding.

  • Reviewed on 5/26/2025

    As always, Dr Cadigan and his staff made my visit successful.

  • Reviewed on 5/25/2025

    Thank you.

  • Reviewed on 5/21/2025

    Dr. Cadigan was excellent and provided clear information