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Accepted Insurance

  • Aetna
  • AmeriChoice by UnitedHealthcare
  • Anthem Blue Cross Blue Shield (BCBS)
  • Anthem Blue Cross Blue Shield (BCBS) of Colorado
  • Anthem Blue Cross Blue Shield (BCBS) of Connecticut
  • Anthem Blue Cross Blue Shield (BCBS) of Maine
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Specialties

Primary: Orthopedic Surgeon

Sub-Specialty: General

Additional Specialties: Orthopedic Surgery, Sports Medicine

More Info

General Info
John Brennan, MD, received his medical degree from SUNY Health Science Center at Brooklyn after attending college at St. Louis University. He then performed a surgical internship at St. Lukes-Roosevelt Hospital Center in Manhattan and followed with his orthopedic residency also at St. Lukes-Roosevelt Hospital Center. During training, he completed rotations at Alfred I. DuPont Childrens Hospital in Delaware, Memorial Sloan-Kettering Cancer Center as well as The Blackrock Clinic in Dublin, Ireland.Dr. Brennan is board certified in orthopedic surgery and is a member of the American Association of Hip and Knee Surgeons, Medical Society of the State of New York, Suffolk County Medical Society and the Irish-American Orthopedic Society. He also has an extra board certification in sports medicine from the American Board of Orthopedic Surgery. Dr. Brennan merged his practice with St. Charles Orthopedics after being in practice in Southampton since 1999.Dr. Brennans practice focuses on complete care of the shoulder, hip and knee with a particular emphasis on minimally invasive techniques. His philosophy is to avoid surgery if at all possible but when it is necessary, utilize the fastest, easiest recovery possibly. These techniques include arthroscopic shoulder and knee repairs including rotator cuff and labral tears in the shoulder and meniscus and ACL tears in the knee. When hip and knee replacements are needed, he uses the latest cutting edge technology with small incision techniques.
Payment method
insurance
Neighborhood
Setauket-East Setauket
Categories

Reviews

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Anonymous

03/27/2019

Provided by Doctor.com
Overall
Shoulder was a breeze surgery and recovery

No pain after 3 days of surgery and recovery was the best I ever had because of the advance technology now days. Don't be afraid. Would you rather be in pain the rest of your life? I didn't. Now I can enjoy my life. Sleep better to. The hospital stay was very good they treated me very well.

James J.

03/21/2019

Provided by Doctor.com
Overall
super, excellent. never felt better.

dr. brennan is the best. my shoulder has never felt so good. its 8 weeks i have not taken any pain killers or over the counter drugs since the operation. i am also done with pt already. i cant say enough about the job he did. very very happy. thank you dr. brennan.

Anonymous

01/23/2019

Provided by Doctor.com
Overall
excellent

I had never had any type of surgery prior to needing this hip replacement. From the beginning Dr Brennan explained what was happening, causes and all options available. I started with cortisone shots then gel injections before proceeding with the surgery. I was Extremely anxious. Dr. Brennan and staff were patient with me, answering all my questions, again and again. All staff at St. Charles were professional and kind. very thorough in all explanations and information.

V. R.

01/09/2019

Provided by Doctor.com
Overall
Rotator cuff surgery

I fell and tore my rotator cuff totally off the bone and Dr. Brennan informed me I needed surgery if I ever wanted to be able to lift my right arm again. I was afraid, but was living in constant pain and agreed to have the surgery. It has been three months since my surgery and I am no longer living in constant pain and I am able to use my right arm again. I would suggest that everyone in need of a rotator cuff repair have the surgery, and request Dr. Brennan because he is the best.

Alissa R.

12/13/2018

Provided by Doctor.com
Overall
Excellent Doctor

My mother had a bad fall and broke her femur which required emergency surgery. Dr Brennan was on call when she was rushed to the ER. From the first moment, I met him I was immediately impressed by his wonderful bedside manners, postivity and care for my mom. He took the time out to address any questions, concerns we had before, after and at the follow-up appts. All in all, Dr Brennan is a wonderful doctor and highly recommend him!

W. B.

12/05/2018

Provided by Doctor.com
Overall
better then i antisapated

had a great experiance with Dr Brennan he did a great job and i am having great results so far. it was not as bad as i thought it would be.

Anonymous A.

10/22/2018

Provided by Doctor.com
Overall
rotator cuff tear

dr.brennan did a wonderful job repairing my rotator cuff tear. five months out and feels great

Joe F.

10/08/2018

Provided by Doctor.com
Overall
Great Experience with my Knee surgery

I am a very active 58 yo. Injured my knee. Was worried if surgery would make a bad situation worse. Did my research and found Dr Brennan. Can not believe how simple the process was. Seamless and flawless. Doctor Brennan, his staff and St Charles Hospital did a wonderful job for me. I only wished I had come to him sooner. One week after surgery I am pain free and doing my thing. Can not say enough about my positive experience.

S. C.

10/08/2018

Provided by Doctor.com
Overall
Rotator Cuff Repair

I have to say my experience with Dr, Brennan was excellent.
I had rotator cuff repair surgery and was off pain medication in 4 days.
This was not what I expected , as I was told horror stories about this surgery. I would have done the surgery years ago if I knew I would have done so well.

Ann S.

09/06/2018

Provided by Doctor.com
Overall
excellant treatment

complete caring with dr brenan and st charles hospital

Anonymous

08/13/2018

Provided by Doctor.com
Overall
great experience

Dr.Brennan explained everthing to me before my surgery, and took time to answer my guestions. Very friendly staff and polite.

Anonymous A.

07/25/2018

Provided by Doctor.com
Overall
Great Doctor

Dr Brennan was patient, empathetic, accurate in his diagnosis, and overall, the best doctor I have seen. I now have a new shoulder.

John D. M.

07/09/2018

Provided by Doctor.com
Overall
well cared for,great compassion,addressed all of my concerns

my overall treatment was fantastic. my new knee is strong and feels stable. dr brennan was the greatest from diagnosis to follow ups. I have recommended him to many of my friends.

Joseph P.

06/13/2018

Provided by Doctor.com
Overall
My experience has been exceptional.

From the beginning of my first visit with Dr. Brennan through my total knee replacement surgery , as well as my subsequent manipulation procedure has been a great experience for me. Dr. Brennan , as well as his assistant Sean Ocame were exceptional throughout my entire surgery and follow up treatment. I also would like to say that the entire staff as St. Charles Orthopedics has also been exceptional throughout my treatment and have made my experience as pleasant as it could ever be.

Suzanne R.

06/13/2018

Provided by Doctor.com
Overall
Hes the Best!!!

Dr Brennan took all the pain away!!! He really listened to all my concerns. I trust him and believe in him!

A. C.

04/30/2018

Provided by Doctor.com
Overall
Highly Recommend

I can not thank Dr. Brennan enough for the care he has provided to myself and my family. His knowledge and expertise helped me through a difficult time and his staff is extremely supportive. I never had a problem asking them questions and understanding the procedures and outcomes. When I needed other doctor recommendations, they were helpful and just as efficient. The group of dr.s at St. Charles Orthopedics are the best. They have earned my trust and loyalty. I can not thank them enough.

D. J.

04/23/2018

Provided by Doctor.com
Overall
Very personable - takes the time to really listen to you.

Dr. Brennan clearly explains the diagnosis and the treatment options.

Details

Phone: (631) 689-6698

Address: 6 Technology Dr Ste 100, East Setauket, NY 11733

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