
Highlights
Age Groups Seen
- Adults
- Geriatrics
Languages
- English
Gender
MaleLocations
- Massachusetts General Rheumatology Clinic
- 55 Fruit Street, Yawkey Building, 4th Floor, Suite 4B, Boston, MA 02114
- Get Directions
- phone: 617-726-7938
- fax: 617-643-1274
- Massachusetts General Dermatology-Rheumatology Connective Tissue Disease Program
- 50 Staniford Street, Suite 807, Boston, MA 02114
- Get Directions
- phone: 617-726-2914
- fax: 617-643-2655
- Mass General Brigham Cancer Institute Cellular Immunotherapy Program
- 32 Fruit Street, Yawkey Building, 9th Floor, Suite 9a, Boston, MA 02114
- Get Directions
- phone: 617-724-6862
- fax: 617-724-5123
Expertise
Education
- Fellowship: Massachusetts General Hospital, Rheumatology, 2023
- Residency: Thomas Jefferson University Hospital, Internal Medicine, 2020
- Medical Education: Icahn School of Medicine at Mount Sinai, 2017
Board Certifications
- Rheumatology: American Board of Internal Medicine, 2022
- Internal Medicine: American Board of Internal Medicine, 2022
Insurance
- Aetna
- Beech Street
- Blue Cross Blue Shield
- 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 CT
- Medicaid RI
- Medicaid VT
- Medicare
- Medicare ACO
- Multiplan
- Senior Whole Health
- TriCare
- Tufts Health Plan
- Tufts Medicare Preferred
- United Health Care
- Wellpoint
- WellSense
Ratings & Reviews
4.8 out of 5
84 ratings, 42 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. Katz was outstanding. My experience for a history and for the exam was thorough and thoughtful. He is an excellent practitioner and has impeccable bedside manner. He listens intently. He was able to pull everything together for a final dialogue with him. Treat him well. We need physicians like him to stay at MGH. Excellent experience.
- Reviewed on 2/1/2026
Dr Katz is professional, knowledgeable and easy to talk to. He answers all my questions in a way that's easy to understand.
- Reviewed on 1/25/2026
Pleasant and listens
- Reviewed on 1/18/2026
Very thoughtful, thorough, knowledgable clinician. super bedside manners and nice person. I am impressed by Dr. Katz. thank you
- Reviewed on 1/11/2026
Dr Katz listened to my concern and let me ask questions. He was patient and then conveyed his deep knowledge and understanding of my health. I would highly recommend his to a friend or family member. I look forward to working with him on my health.
- Reviewed on 12/31/2025
Informative and helpful
- Reviewed on 12/30/2025
Dr. Katz and is NP were very thorough. Spent an awful lot of time with me and made me feel as if I was there only patient that day. l look forward to working with them again.
- Reviewed on 12/29/2025
Very useful and informative visit on new and future treatment options for IGG4
- Reviewed on 12/21/2025
My Rheumatologist, Guy Katz, is one of the most professional, comprehensive and talented physicians I have had the privilege of knowing and who has taken great care in treating my diagnosis.
- Reviewed on 12/20/2025
Good experience. [redacted]
- Reviewed on 12/20/2025
Dr. Katz is great at listening and providing options for my treatment to ensure it aligns with my life goals.
- Reviewed on 12/16/2025
I was very pleased with Dr. Katz. Very thorough. It was a good experience in his office. Thank you.
- Reviewed on 12/14/2025
Dr. Katz has been a concerned provider, who is easy to work with. [redacted]
- Reviewed on 12/7/2025
Very professional. On top of all aspects of my condition. Listens to my comments,and explains what He feels is going on, and how to proceed.
- Reviewed on 12/5/2025
My appt with Dr. Guy Katz was AMAZING! [redacted] My appt began with the NP, [redacted], and he was also very respectful, kind and truly listened to my concerns and symptoms! [redacted] conferred with Dr. Katz who then performed his own exam after listening and asking detailed questions about my symptoms! Dr. Katz ordered labs and next steps depending on my results. My appt was extremely thorough and I truly received amazing care! Thank you kindly!
- Reviewed on 12/1/2025
It was excellent.
- Reviewed on 11/24/2025
Dr. Katz is thorough friendly and patient. Very easy to ask questions I have, even if I feel they may sound unimportant. Great experience
- Reviewed on 11/17/2025
Dr. Katz was an exceptional doctor and very caring.
- Reviewed on 11/12/2025
My experience with this provider was wonderful. He really helped us get a good diagnosis and get treatment that worked for me as well as my son. I'm really happy with him and I would recommend him highly to anybody that's looking for a wonderful doctor close to Boston.
- Reviewed on 11/10/2025
Very knowledgeable and certainly caring
- Reviewed on 10/19/2025
Dr Katz is a blessing. I feel very fortunate to be able to receive his thorough care without having to make the two hour drive. He always steers me in the right direction and let's me know what our next step will be. He and his staff have been always available for my questions and concerns.
- Reviewed on 10/15/2025
I think Dr. Katz is a very pleasant person to deal with. He seems very confident and we're very happy that [redacted] is able to see him. Thank you.
- Reviewed on 10/13/2025
He was kind and explained everything for me. For once I felt like I had Hope.
- Reviewed on 9/21/2025
Dr Katz was able to talk to me in detail about his thinking on my current diagnosis and what course of treatment and tests could 1. Improve my quality of life, and 2. Rule out other diseases that have similar pathologies. He was very generous with his time and answered all of my questions and addressed my fears about long- term use of certain medications. I appreciated his attention and expertise. My meeting with him alleviated a lot of the anxiety I'd experienced in the previous weeks.
- Reviewed on 9/17/2025
Yeah, Dr. Katz is great. I like him a real lot.
- Reviewed on 9/7/2025
Absolutely amazing experience
- Reviewed on 9/5/2025
Dr. Katz is an extraordinary doctor and human being. He took all the time necessary to discuss my very complicated case. He did not rush or pressure me. His knowledge of IgG4 is very complete. He strategized as to how best to proceed, took all the necessary steps, and contacted me with a detailed plan of future steps. For the first time I feel that I have a doctor who understands my illness, and who will do everything to help me maintain my health, and who is a kind and understanding person to boot.
- Reviewed on 8/21/2025
Very good experience meeting and interacting with Dr. Katz and his associate. He was cognizant of my condition based on his review of my lab results/files. Very thorough in his approach to treating my condition.
- Reviewed on 7/27/2025
He was laser focused on my condition and possible treatments
- Reviewed on 7/16/2025
Dr. Katz was very professional, very thorough, very kind, very patient, and gave me an excellent account of my problems and my needs. I would definitely see him again if need be.
- Reviewed on 6/30/2025
I literally can't day enough POSITIVE things about Dr.Katz. He is the best doctor i have ever seen...for myself and my family! He is kind, understanding, genuine and so very thoughtful.
- Reviewed on 6/29/2025
Dr Katz is fantastic. He explains everything clearly and values my opinion. I highly recommend him. Very considerate and caring and of course knowledgeable.
- Reviewed on 6/22/2025
Dr Katz is the best doctor I know . He is gentil, companionate , kind and excellent professional.
- Reviewed on 6/18/2025
Dr Katz is outstanding. It just challenging to get seen by him without a lengthy delay but i greatly appreciate his responses via the portal
- Reviewed on 6/16/2025
Very knowledgeable and helpful to point me in the right direction concerning my right index finger.
- Reviewed on 6/15/2025
Dr. Katz is a competent professional. We discuss treatment options and solicit my opinions. I always feel like he has my best interest in mind. I have had a number of rheumatologists of the last 12 years and Dr. Katz is truly one of the best.
- Reviewed on 5/11/2025
Overall great experience - thank you
- Reviewed on 5/11/2025
I have been going to rheumatologists since I was [redacted] Dr. Katz is by FAR one of the most compassionate, empathetic, and thorough doctors I have ever had the opportunity to see. He is consistently kind, and takes a holistic approach to health and wellness, recognizing that it looks different for every person, and he provides you with the most customized care he possibly can. I truly look forward to my appointments with Dr. Katz, even when the news about my condition is negative, because I trust that I am in good hands under his care no matter what happens. I have recommended him to everyone I know, both with joint problems and without! I couldn't possible say enough good things about him! I hope someone in his line of supervision sees this and is able to send appropriate kudos/recognition his way.
- Reviewed on 5/11/2025
Informative and knowledgeable
- Reviewed on 5/8/2025
Dr. Katz had the most wonderful, wonderful woman, [redacted], helping him and talking with us and he also spent time since we had no idea what's wrong with me. Thank you very much.
- Reviewed on 4/2/2025
His explanations were very clear and I thought he was an excellent... it was an excellent visit.
- Reviewed on 3/29/2025
I was very pleased with the visit. The experience could not have been better