John J. Brennan, MD
715 Roanoke Avenue, Riverhead, NY 11901
Location & Phone number
715 Roanoke Avenue, Riverhead, New York 11901, United States
About the Business
Welcome to the practice of John J. Brennan, MD, a distinguished orthopedic surgeon dedicated to providing exceptional care in Riverhead, New York. Located at 715 Roanoke Avenue, Dr. Brennan brings extensive expertise and a compassionate approach to treating a wide range of orthopedic conditions.
Dr. John Brennan earned his medical degree from SUNY Health Science Center at Brooklyn after completing his undergraduate studies at St. Louis University. He honed his skills through a surgical internship and orthopedic residency at St. Luke’s-Roosevelt Hospital Center in Manhattan. His training included rotations at prestigious institutions such as Alfred I. DuPont Children’s Hospital, Memorial Sloan-Kettering Cancer Center, and The Blackrock Clinic in Dublin, Ireland.
Board certified in orthopedic surgery and sports medicine, Dr. Brennan is a proud 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. Since 1999, Dr. Brennan has served the community, merging his practice with Orthopedic Associates of Long Island to offer comprehensive orthopedic care.
Dr. Brennan specializes in the complete care of the shoulder, hip, and knee, emphasizing minimally invasive techniques. His philosophy prioritizes non-surgical solutions whenever possible, ensuring surgery is only considered when necessary. When surgery is required, he employs the latest technologies to facilitate the quickest and easiest recovery. His expertise includes arthroscopic shoulder and knee repairs, addressing rotator cuff and labral tears in the shoulder, as well as meniscus and ACL tears in the knee. For hip and knee replacements, Dr. Brennan utilizes cutting-edge technology and small incision techniques.
In addition to joint replacement and sports medicine, Dr. Brennan offers specialized care in hand, foot, and ankle conditions, as well as concussion management, supported by state-of-the-art MRI technology.
For compassionate and expert orthopedic care, visit Dr. John J. Brennan at 715 Roanoke Avenue, Riverhead, NY 11901, or at his additional location at 6 Technology Drive, Suite 100, East Setauket, NY 11733. Discover the difference of personalized, patient-centered care with Dr. Brennan, where your health and recovery are our top priorities.
Photos
Hours open
Monday:
9:00 AM - 5:00 PM
Tuesday:
9:00 AM - 5:00 PM
Wednesday:
9:00 AM - 5:00 PM
Thursday:
9:00 AM - 5:00 PM
Friday:
9:00 AM - 5:00 PM
Saturday:
Closed
Sunday:
Closed
Reviews
"After a year and a half of putting it off I’ve scheduled my full knee replacement with Dr. Brennen. He’s a kind and knowledgeable doc who answers all my questions. His staff is always efficient and friendly. A finely run office too! I’m so glad I found him."
"Doctor Brennan has been my Doctor for years. He repaired two seriously torn rotator cuffs and is currently managing and treating lower back issues. He's a great Doctor. My shoulders are stronger than ever. Thanks Doc."
"Dr. Brennan is fabulous! I had a bad tear in my rotator cuff and he fixed it! After a couple of weeks, the pain was manageable with Motrin. At the 8 week mark, according to the Good Doctor, he said I am moving as if it’s been 3+ months. He is an excellent surgeon! I have, unfortunately, had dealings with a few doctors at Orthopedic Associates, and they have all been extremely competent and compassionate. That goes for the staff also! Thank you Dr. Brennan, you are the BEST! I will be getting my other shoulder done in 2025!"
"Dr. Brennan and his physicians assistant Justin were fantastic during my first visit. They were thorough in checking my wrist condition and gave me options on how to proceed- thank you guys so much. I will recommend you to anyone that is looking for a great orthopedic experience."
"Friendly and knowledgeable staff. Dr. Brennan has been my orthopedic Dr. for a long time. He is very knowledgeable and listens to what you say. Both my husband and I feel that he is an excellent physician. We recommend him to our friends."
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