Augustus Daniel Mazzocca, MD

Augustus Daniel Mazzocca, MD

Not currently accepting new patients

4.911392 average rating from 316 patient reviews

Specialties

Affiliation

Mass General Brigham

Provider Locations

  • Waltham, MA
  • Foxborough, MA

Dr. Augustus "Gus" Mazzocca is the newly appointed medical director of Mass General Brigham Sports Medicine and is also the chief of Mass General's Sports Medicine Service and the director of the Bioskills, Biomechanics and Cell Biology Laboratories within the Department of Orthopaedic Surgery at Massachusetts General Hospital. Alongside these posts, Dr. Mazzocca serves on the faculty of orthopaedic surgery at Harvard Medical School.

Dr. Mazzocca earned his Bachelor of Science degree in biology from Denison University, a Master of Science in applied physiology from Springfield College and his medical degree from the University of Connecticut School of Medicine. He completed an internship and residency with the Department of Orthopaedic Surgery at the University of Connecticut School of Medicine, as well as a fellowship in Sports, Shoulder and Elbow Surgery at Rush University in Chicago.

Dr. Mazzocca is an internationally renowned shoulder and elbow clinician specializing in complex joint injuries and conditions. Dr. Mazzocca comes to Mass General from the University of Connecticut Health Center, where he was director of the UCONN Health Musculoskeletal Institute and professor of orthopaedic surgery. As a professor, he was the Orthopaedic Teacher of the Year in 2013 and 2021. Dr. Mazzocca played an active mentor role in UCONN's Orthopaedic Residency program since 2002, serving at times as director and assistant director of the program. He has served on numerous masters and PhD committees and has mentored hundreds of fellows, residents and other graduate students over his long career. In his UCONN role, he also served as team physician for UCONN Athletics and orthopaedic director for the state of Connecticut's Department of Corrections.

Dr. Mazzocca has dedicated his non-clinical life to education, research and his family, which is most important to him. He is a member of the prestigious American Orthopaedic Society for Sports Medicine (AOSSM), American Shoulder and Elbow Surgeons Society (ASES), The International Society of Arthroscopy, Knee Surgery and Orthopedic Sports medicine (ISAKOS), as well as being a member of the European Society for Surgery of the Shoulder and Elbow (ESSSE). He and colleague Jon J.P. Warner, MD, co-founded the New England Shoulder and Elbow Society (NESES), which is a regional society dedicated to educating and researching problems related to the shoulder and elbow. He is the founder and was the director of the University of Connecticut Human Soft Tissue Research Laboratory, and he has published over 250 peer-reviewed journal articles.

Education & Training

  • Fellowship: Rush University Medical Center, Sports Medicine, 2002
  • Residency: University of Conn. Health Ctr., Orthopedic surgery, 2001
  • Medical Education: University of Conn. Health Ctr., 1996

Board Certifications

  • Orthopaedic Surgery, American Board of Orthopaedic Surgery

Languages Spoken

  • English

Age Group Treated

  • Adults

Patient Feedback

4.911392 average rating from 316 reviews

  • Always the best!

    2026-07-08

  • Dr Mazzocca is outstanding

    2026-07-08

  • Everyone was very kind and efficient .

    2026-07-08

  • I really liked Dr. Mazzocca. He explained things in a way I could understand

    2026-07-06

  • For me, I think he seemed to know the issues that I had and he appeared to be very knowledgeable about it and recommended me to another doctor naturally. But other than that, he was a go with me.

    2026-07-03

  • The doctor explained things throughly.

    2026-07-01

  • Dr Mazzocca is the best. He is kind, respectful, patient, knowledgeable and extremely thorough. He explains everything from X-ray & MRI results to all the potential options to address your condition. I would highly recommend Dr. Mazzocca

    2026-07-01

  • Dr. mazzocca was fabulous! He was so thorough. I felt that he truly cared and wanted to help me. I was very impressed with him. I would highly recommend him for sports medicine. Everyone at the office were super efficient. Very pleased with the care I had with the sports Medicine dept!

    2026-06-30

  • There was no discussion about the cause of my shoulder problems.

    2026-07-03

  • I was treated with care and kindness

    2026-07-02

  • Everything perfect

    2026-06-27

  • He was very thoughtful and focused on my specific needs.

    2026-06-26

  • Definitely cares about my situation, very happy with my progress.

    2026-06-24

  • Knowledgeable, straightforward, very good

    2026-06-24

  • Thank you for being a good person.

    2026-06-23

  • Very detail oriented and moves quickly to get to the next steps in treatment.

    2026-06-18

  • he's a top surgeon

    2026-06-17

  • It was the usual, professional, caring and pleasant experience. Dr. Mazzocca is great to work with.

    2026-06-17

  • My feedback for Dr. Mazzocca and his entire staff is that place is run like a Swiss watch. It is, first of all, they got me in so fast from my initial consultation with an orthopedic surgeon in Stoneham who referred me right away. And those folks somehow pulled strings or something to get me in to see Dr. Mazzocca the following week, which is so shocking and welcome. I couldn't believe it. And then the appointment ran on time. The staff knew about me, which was nice before I showed up. They worked well together.

    2026-06-18

  • Fine man, friendly, easy to interact with, obviously very expert. I want him for my surgery if I must have one.

    2026-06-15

  • It was excelent

    2026-06-15

  • Thank you for your service and continued care

    2026-06-13

  • Awesome

    2026-06-13

  • [redacted] This doc at MGH was great.

    2026-06-06

  • Dr Mazzocca is a great guy speaks to you in terms that you understand there's never any confusion. [redacted] also and always has been extremely caring and made all necessary. Phone calls to clear up any confusion with healthcare providers. Couldn't have asked for a better team great experience.

    2026-06-06

  • He's amazing and truly knowledgeable and efficient. I trust him and I'm fortunate I am in his care

    2026-06-04

  • Dr. Mazzocca is the best orthopedic surgeon I have ever had the privilege of meeting. I have known him for over 10 years and he's always excelled in his office and the Operating Room. I love his warm, friendly nature, coupled with his absolute mastery of the subject at hand. He is through, honest, decisive, and has a genuine desire to help the patient learn what they need to know. It is an honor knowing him and always a pleasure being around him.

    2026-06-03

  • XRay team was professional and efficient. Doctor M was respectful, friendly and extremely knowledgeable. He provided a clear way ahead with different options depending on what the MRI uncovers. the whole team was great...

    2026-05-28

  • The smartest&most patient Dr. Was very sincere,friendly&listened closely to me.

    2026-05-24

  • Dr was very reassuring, checked my MRI, my range of motion and strength to/from various directions and explained options well.

    2026-05-22

  • very good professional.

    2026-05-21

  • Dr. Mazzocca was very pleasant and explained things in a way I could understand.

    2026-05-15

  • Dr M is first rate, straight forward and extremely competent!!!! He has a way with people that's rare!! A plus plus

    2026-05-14

  • Very knowledgeable, nice demeanor, professional and personal

    2026-05-12

  • Extremely satisfied with dr mazzocca

    2026-05-16

  • knowledgeable and professional.

    2026-05-11

  • Thanks to Dr Mazzocca and his staff I am 100% after my surgery one year ago. I will recommend Dr Mazzocca to anyone who is in need of rotator cuff / shoulder surgery

    2026-05-09

  • My Dr Mazzocca was simply Outstanding !!! I would recommend him to all of my family & friends ?

    2026-05-07

  • Dr. Mazzocca is fabulous in every way - knowledgeable, skillful, respectful, kind, courteous and compassionate - everything you could possibly ask for in any doctor but especially a specialist dealing with a specific issue (shoulder injury/surgery). He listens and responds to your concerns and provides exceptional care. Highly recommend him for anyone with a shoulder issue.

    2026-05-07

  • Excellent!!

    2026-05-06

  • I had a great visit with my provider.

    2026-05-06

  • Thank you for the excellent service, and if possible, please continue to assist me.

    2026-05-03

  • Dr. Mazzocca is great! He is kind, knowledgeable, and a very good listener. I really appreciate having him as my doctor. His direct staff are also excellent, very polite and accommodating.

    2026-04-20

  • Excellent doctor-patient dialogue!

    2026-04-17

  • I respect and appreciate Dr Mazzocca

    2026-04-15

  • The doctor did a nice job. It was a great visit. Thank you.

    2026-04-10

  • Dr. Mazzocca was very engaged and listened to what I had to say. He was very respectful of my opinion for treatment moving forward, I look forward to working with him in the future

    2026-04-09

  • It's was perfect

    2026-04-08

  • Dr Mazzocca is exceptional with his care, interest and support for me.

    2026-04-05

  • He was very knowledgeable and provided information that was not previously made by the orthopedic surgeon who conducted my surgery ~8 months ago.

    2026-03-24

  • The only reason my appointment was late was because there had been a fire drill earlier that day, and the doctor apologized for the delay. He was very caring and sympathetic to the pain I was experiencing.

    2026-03-23

  • The whole office was very professional. The doctor made me feel comfortable and was very reassuring that I will get better.

    2026-03-22

  • Hi, my experience was just wonderful. Every single appointment that I've had with Dr. Mazzocca and the staff is fantastic. I am so favorably impressed every time I come at how genuinely it would seem sweet and interested and competent everybody is and I really appreciate that.

    2026-03-20

  • Excellent care. Excellent communication. Explains medical issues well. Very pleasant manner.

    2026-03-19

  • I cannot express enough how kind and gentle and knowledgeable and caring this man is. He always answers all my questions, addresses my concerns even when they don't directly relate to an issue at hand. I feel well cared for when I see this man.

    2026-03-16

  • From the front of the house to the back of the house, every thing was spot on.

    2026-03-18

  • What are the best providers ever had thoughtful, courteous and very careful. Explain the operation and recover recovery.

    2026-03-09

  • Dr. Mazzocca was extremely attentive and gave me as much information as I could have wanted and answered all of the questions that I asked him thoroughly. It was a pleasure seeing him.

    2026-03-09

  • Yes, the doctor was very, very good. He listened to everything, explained things thoroughly to me, and gave me really good life advice. Very good bedside manner. He was recommended to me by a friend of mine that's a doctor at MGH, and I was not disappointed at all. He definitely gave me some good insights into my condition and a way to manage it and improve it and good life advice.

    2026-03-09

  • This was my first appointment and I was very impressed so much I thought I was speaking with a family member that cared about me and the best treatment forward. We all need more Doctors like him. Thanks for the opportunity to share my thoughts and experience.

    2026-03-06

  • The doctor was very knowledgeable, informative, and pleasant to deal with

    2026-02-28

  • Yes, I found Dr. Mazzocca to be very personable, knowledgeable, helpful. [redacted]

    2026-03-04

  • My orthopedic Provider at this office has always been professional and any test that is needed this provider will go over all the results and include your concerns or questions in the outlined plan to get you back to a healthy recovery.

    2026-02-25

  • Dr Mazzocca genuinely understood my recovery process. He once again reviewed my procedure and discussed future expectations for recovery.

    2026-02-23

  • Excellent experience

    2026-02-23

  • Nothing. Everything went perfect

    2026-02-19

  • Doctor was very thorough and professional- I felt very confident with him

    2026-02-19

  • He was very thorough and listened well!

    2026-02-19

  • My concerns were not discussed because I didn't have any.

    2026-02-19

  • Great doctor & staff??

    2026-02-18

  • It was my first time meeting with this type of doctor. I was concerned the problem may have been something worst than it turned out to be. It was explained so clearly and I was provided with a solution, PT and the Doctor also recommended the facility I was hoping to visit. I am so grateful for such a positive experience. Grateful for Dr. Mazzocca.

    2026-02-18

  • Great experience, very knowledgeable of the injury that I had.

    2026-02-16

  • I have the utmost confidence in him.

    2026-02-25

  • excellent

    2026-02-07

  • Very efficient listen to my concerns and explained everything

    2026-02-07

  • Dr Mazzocca is one of the best doctors I have seen in the past 20 years. He listened to my issues, explained what he saw on the X-rays, and carefully mapped out what he thought was the best plan for me. He quickly made referrals where he thought it was important. I would highly recommend Dr Mazzocca.

    2026-02-06

  • The doctor was experienced, he was knowledgeable, and gave me complete confidence in his ability to forecast the situation and tell me what the best thing to do was.

    2026-01-30

  • Dr Mazzocca was very kind and took time to ensure both my son and I were informed and comfortable with the plan. He out my son at ease right away with his energy and engaging personality.

    2026-01-28

  • Dr. Mazzocca listened carefully to my concerns, explained my treatment options clearly and respectfully, and allowed me to feel confident in my decision to enlist in his care.

    2026-01-28

  • This was my first visit with this doctor. I was satisfied with the appointment and the experience with the doctor, the administrative people and X-ray techs. I'm glad I booked my appointment here.

    2026-01-21

  • He spoke to me very rationally about my options and allowed me to ask what I needed to make an informed choice about next steps.

    2026-01-21

  • He was very professional and very easy to talk to. He did not rush the appointment and listened carefully to everything I had to say. He explained what he thought was going on with my shoulder and what the next steps would be. I can't say enough about the Waltham facility. There is never and issue with appts, staff or care. I wish all Mass Gen facilities were as well run as Waltham.

    2026-01-20

  • As always, Doctor Mazzocca gave me good advice about my shoulder, discussing its current state and plans for surgery in the Fall. He also ordered an MRI and I have a followup meeting scheduled.

    2026-01-19

  • The very best

    2026-01-14

  • After my previous experience with MGH ortho surgical PA I was pleasantly surprised with the care I received.

    2026-01-14

  • Dr. Gus is one of the best providers I have ever had for anything in my life and I'm [redacted] years old. He treats me like I'm the only patient he's ever had.

    2026-01-12

  • He was on time, he listened, asked questions and explained everything very well. I much appreciate his welcoming me. I feel he actually was very caring to my issue and pain.

    2025-12-29

  • Excellent, personalized care and directed to my needs and concerns. Outstanding

    2025-12-26

  • Dr. Augustis Mazzocca introduced himself as Dr. Gus Mazzocca in a very comforting way, which immediately relaxed the nervousness I had meeting a new health provider for my ongoing issue. He was attentive in listening to my concerns and after reviewing my x-ray explained to me in a detailed manner what he observed and what would be the next course of action. I felt not rushed and empathy in his words and will follow his actions going forward. It was comforting in my belief I had made the correct choice for my shoulder issues.

    2026-01-04

  • Always very timely and professional

    2025-12-22

  • Excellent job my kind of people

    2025-12-20

  • Thank you MGH.

    2025-12-12

  • Always a pleasure and I appreciated the understanding and insight of the provider.

    2025-12-11

  • Very at ease throughout

    2025-12-11

  • Dr Mazzocca is Fantastic! He explains everything clearly & in detail. Open communication w/ me & my PT. Always greets me with a warm & welcoming spirit!

    2025-12-09

  • He was wonderful. He explained everything to me. I recommend him highly. Thank you.

    2025-12-11

  • Very easy to speak with. Dr Mazzocca explained my situation and provided a care plan to follow and when and if needed to follow up sooner

    2025-12-09

  • Dr Mazzocca was extremely kind and concerned about my injury and explained the process of the surgery and recovery. I liked him very much and feel very comfortable with him taking care of me.

    2025-12-07

  • One of the best experiences in a medical office I've had. Professional, on time and highly experienced.

    2025-11-23

  • Very happy from beginning, great bedside manner, knew the operation well

    2025-11-22

  • Dr Mazzocca is great

    2025-11-20

  • I am so happy that I found Dr. Mazzocca. He listens carefully and is patient and kind. He is easy to talk to and I never feel rushed. He has helped me so much

    2025-11-16

  • Great experience

    2025-11-15

  • I am completely happy with my experience with Dr. Mazzocca. He listened carefully to all my concerns and took action on all of them.

    2025-11-12

  • This was the first time that I met Dr. Mazzocca, he made me feel very comfortable right away. He listened to what I had to say, and I really felt I was in good hands with him.

    2025-11-12

  • He was attentive and prepared for my appointment. This was a second opinion for a pending surgery. He was knowledgeable and spent ample time answering questions. Terrific!

    2025-11-12

  • Initial visit, seems very knowledgeable and trustworthy.

    2025-11-10

  • I throughly enjoyed my visit. Dr Mazzocca was kind, honest, knew my case before I entered and put forth a plan for my eventual surgery moving forward. I really appreciate the fact that he does not want to rush into surgery as my shoulder is still functioning at a high level.

    2025-11-06

  • Doctor Mazzocca is always on time, thorough and explains things in an appropriate manner. I highly recommend him and have done so in the past.

    2025-11-05

  • I wish all my past and present doctors were as wonderful as this Doctor. He made the visit easier even though I was in pain. His personality and knowledge made this the best experience in healthcare that I have had in a very long time.

    2025-11-05

  • As always extreme professionalism and courtesy!!!

    2025-10-30

  • Dr Mazzocca has an incredible bedside manner, which certainly makes a stressful situation less so. He listened carefully and took the time to fully understand my concerns. Provided a comprehensive game plan to address my medical issue.

    2025-10-16

  • Dr. Mazzocca was very knowledgeable and knee exactly how to test my shoulder to determine the extent of my injury. He was very kind and explained everything as he did it.

    2025-10-14

  • Dr. Mazzocca was very personable and knowledgeable.

    2025-10-17

  • Best Dr's visit I've had in years.

    2025-10-17

  • From the woman at the front desk to the doctor, everyone was delightful. I arrived early, and they were able to see me almost right away. This doctor was highly recommended to me and I can see why. I had to travel a bit to get to his location in Waltham, but it was well worth it.

    2025-10-14

  • Dr Mazzocca was very professional and knowledgable.All information was given to me about the process of my care.Had a good comprehensive exam.

    2025-10-11

  • I like the Dr. Matika very much, a very nice, very polite, very knowledgeable. My initial check-in, the girls were not very nice, but then the check-in on the side of the orthopedic side, those two girls were super nice and friendly. And the provider was excellent. And thank you. I wanted... Hi. Hi. Is that the green? Yeah. And I wanted to ask your manager, I wanted to ask if you have a.

    2025-10-10

  • It was very clear from the beginning of the visit that Dr. Mazzocca listened to what I was saying, is very experienced in accurately diagnosing my injuries and in creating a plan to restore my shoulder/arm function as much as possible.

    2025-10-09

  • Thank you

    2025-10-08

  • Dr. Mazzocca is an excellent doctor and I highly recommend him to anyone needing orthopedic surgery!

    2025-10-08

  • Dr. Mazzocca spent the necessary time with me to understand the location of my pain and explained what I should do to follow up.

    2025-10-06

  • Wonderful

    2025-10-06

  • Very comforting, friendly and an extremely competent physician!

    2025-09-29

  • 1 year ago I had a massive rotator cuff repair done by Dr. Mazzocca and his team. I was extremely satisfied with all my appointments leading up to this surgery and the surgery itself. Dr. Mazzocca is a talented surgeon and I have recommended him to many people already.

    2025-09-25

  • Dr. Mazzocca is a great doctor who is supported by a great staff. I would recommend Dr. Mazzocca to anyone needing orthopedic surgery. Regards, [redacted]

    2025-09-25

  • Was very pleased with my appointment. The doctor explained everything to me in a timely and professional manner.

    2025-09-24

  • Great and incredibly efficient service

    2025-09-24

  • First of all, one of the questions about the nurse, I said, I hit one, which was never, and I meant to hit four. But as far as Dr. Mazzocca goes, he's a wonderful guy. He explains things, he takes time, he's wonderful, and I really like him.

    2025-09-19

  • I'm so happy I got to see Dr. Mazzocca. He is absolutely amazing, I feel so grateful to have him as my Doctor!

    2025-09-19

  • Very pleased w/ Dr. Took the time to explain results, options, allowed for my participation re: treatments options. Would highly recommend!

    2025-09-11

  • When he did dictation I could tell he had listened to me as he repeated my concerns in his dictation. He was friendly and courteous while being very professional and knowledgeable.

    2025-09-11

  • Dr. Mazzocca is great. Very kind, knowledgable, and a good listener.

    2025-09-10

  • Professional and very helpful with my condition. Marvelous!

    2025-09-08

  • Dr. Mazzocca was very thorough, explaining everything I needed to understand, recording my issues and physical status, advising on best approach going forward. I truly appreciate his advice.

    2025-09-08

  • I liked how he showed me the imaging and explained where the problem is and detailed the solution would work. I felt confident I understood what was going on.

    2025-09-08

  • Everything was excellent.

    2025-09-06

  • As a doctor was very thorough and knowledgeable about my condition. I thought he was terrific.

    2025-09-01

  • Made me feel quite comfortable from start to finish with him. Very good first impression and extremely knowledgeable and forthcoming about discussing treatment options.

    2025-08-31

Accepted Insurance

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