Dr. John Brennan, MD

Orthopedic Surgery  |  
Male  |  
Age 50
(28)
Insurances AcceptedSave
Dr. John Brennan, MD
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. Luke's-Roosevelt Hospital Center in Manhattan and followed with his orthopedic residency also at St. Luke's-Roosevelt Hospital Center. During training, he completed rotations at Alfred I. DuPont Children's 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. Brennan's 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.

74 Commerce Ave Ste 4

Riverhead, NY 11901

Contact Information

(631) 689-6698

Dr. John Brennan, MD

Dr. John Brennan, MD

Accepted insurance

  • Aetna
  • Anthem
  • Blue Cross Blue Shield
  • Capital District Physician's Health Plan (CDPHP)
  • Cigna
  • Commercial Insurance Company
  • Connecticare
  • EmblemHealth
  • Empire Blue Cross Blue Shield
  • HealthFirst
  • Humana
  • Locals (any local)
  • MagnaCare
  • Medicaid
  • 4 More

*Please verify this information when scheduling an appointment.

Learn about Dr. Brennan

Dr. Brennan's Experience

0%ExperienceMatch
Dr. Brennan's experience matches your search based on the following criteria:
  • Based on total number of patients treated over the last 12 months
  • Specializes in Orthopedic Surgery
  • Board certified in Orthopaedic Sports Medicine and Orthopedic Surgery
  • No malpractice claims found
  • No sanctions found
  • No board actions found
2

Specialties

  • Orthopedic Surgery
  • Sports Medicine
2

Board Certifications

  • Orthopaedic Sports Medicine
    Accredited by: American Board of Orthopaedic Surgery*
  • Orthopedic Surgery
    Accredited by: American Board of Orthopaedic Surgery*
98

Conditions Treated

  • Achilles Tendinitis
  • Adhesive Capsulitis
  • Ankle Fracture
  • Ankle Sprain and Achilles Tendon Sprain or Rupture
  • Ankle Sprains and Strains
  • Anterior Cruciate Ligament (ACL) or Posterior Cruciate Ligament (PCL) Tear
  • Autoimmune Diseases
  • Back Pain
  • Baker’s Cyst
  • Bone Cancer
  • Bone Disorders
  • Brachial Plexus Palsy
  • Broken Arm
  • Bursitis
  • Cancer
  • Carpal Tunnel Syndrome
  • Cervical Spine Myelopathy
  • Chondrocalcinosis
  • Chronic Neck Pain
  • Chronic Pelvic Pain
  • Clavicle Fracture
  • Complications of Joint Prosthesis
  • De Quervain's Disease
  • Degenerative Disc Disease
  • Elbow Bursitis
  • Elbow Injuries
  • Elbow Sprain
  • Enthesopathy of Hip (incl. Trochanteric Bursitis)
  • Femur Fracture
  • Foot Conditions
  • Foot Fracture
  • Foot Sprain
  • Fracture
  • Fracture of Hand (incl. Fingers)
  • Gait Abnormality
  • Ganglion Cyst
  • Glenoid Labrum Tear
  • Gout
  • Hammer Toe
  • Hand Conditions
  • Hand Fracture
  • Herniated Disc
  • Hip Fracture
  • Hip Sprain
  • Internal Derangement of Knee
  • Intervertebral Disc Disease
  • Joint Pain
  • Knee Dislocation
  • Knee Disorders
  • Knee Fracture
  • Knee Sprain
  • Lateral Collateral Ligament (LCL) Sprain
  • Lateral and Medial Epicondylitis (Tennis and Golf Elbow)
  • Leg Fracture Above Knee (incl. Hip)
  • Leg Fracture Below Knee (incl. Ankle)
  • Limb Pain
  • Low Back Pain
  • Lupus
  • Marfan Syndrome
  • Medial Collateral Ligament (MCL) Sprain
  • Myelopathy
  • Osteoarthritis
  • Osteoarthritis of Hand or Wrist
  • Osteoarthritis of Hands
  • Osteoarthritis of Hip
  • Osteoarthritis of Hip and Thigh
  • Osteoarthritis of Knee
  • Osteoarthritis of Shoulder
  • Osteoarthritis of Spine
  • Osteochondritis Dissecans
  • Osteopenia
  • Patellofemoral Pain Syndrome or Knee Pain
  • Pathological Spine Fracture
  • Pelvic Fracture
  • Peripheral Nerve Disorders
  • Pseudoarthrosis
  • Pyogenic Arthritis
  • Radiculopathy (Not Due to Disc Displacement)
  • Rheumatoid Arthritis
  • Rotator Cuff Tear
  • Runner's Knee
  • Scoliosis
  • Shoulder Dislocation
  • Shoulder Disorders
  • Shoulder Impingement Syndrome
  • Shoulder Tendinitis and Tenosynovitis
  • Spinal Cord Injury
  • Spinal Stenosis
  • Spine Deformities
  • Spine Disorders
  • Spine Fractures, Traumatic
  • Spondylitis
  • Spondylolisthesis
  • Sprains and Strains (incl. Muscle Tear)
  • Systemic Chondromalacia
  • Tibia and Fibula Fractures
  • Trigger Finger
  • Wrist Fracture

More

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42

Procedures

  • ACL Surgery
  • Arm Surgery
  • Arthroscopic Shoulder Surgery
  • Carpal Tunnel Release
  • De Quervain's Release
  • Dressing and-or Debridement of Wound, Infection, or Burn (incl. Negative Pressure Wound Therapy)
  • Elbow Fracture and Dislocation Treatment
  • Elbow Fracture and-or Dislocation Treatment, Open
  • Excision of Femur or Knee
  • Foot and Ankle Fracture Treatment, Closed
  • Foot and Ankle Fracture Treatment, Open
  • Foot and Ankle Fracture and Dislocation Treatment
  • Foot and Ankle Ligament and Tendon Repair
  • Fracture Care
  • Hand and Wrist Fracture Treatment, Closed
  • Hand and Wrist Fracture and Dislocation Treatment
  • Hip Fracture and Dislocation Treatment
  • Hip Fracture and-or Dislocation Treatment, Closed
  • Hip Fracture and-or Dislocation Treatment, Open
  • Hip Replacement
  • Hip Replacement Revision
  • Hip Resurfacing
  • Joint Drainage
  • Knee Arthroscopy
  • Knee Replacement
  • Knee Replacement Revision
  • Knee Surgery
  • Knee and Leg Fracture and Dislocation Treatment
  • Knee and Lower Leg Fracture Treatment, Closed
  • Knee and Lower Leg Fracture Treatment, Open
  • Myofascial Trigger Point Injection
  • Nerve Block, Somatic
  • Neuroplasty
  • Peripheral Nerve Block
  • Resection or Ablation of Bone Tumor, Partial or Complete Resection of Bone, Debridement of Bone
  • Rotator Cuff Surgery
  • Shoulder Fracture Treatment
  • Shoulder Fracture and Dislocation Treatment
  • Steroid Injection
  • Trigger Finger Release
  • Trigger Point Injection
  • Viscosupplementation With Hyaluronate

More

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Background Check

0 Malpractice Claims

No malpractice history found for New York.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.

Education

  • Suny Downstate Medical Center College of Medicine
    Medical School | Graduated 1993
  • St Lukes Roosevelt Hospital
    Residency Hospital | Completed 1999

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Brennan has no media or publications listed.

Languages Spoken

  • English

Memberships & Professional Affiliations

Dr. Brennan does not have any memberships or affiliations listed. If you are Dr. Brennan and would like to add memberships or affiliations, please update your profile.

Dr. Brennan's Reviews

Likelihood of recommending Dr. Brennan to family and friends
4.4
based on 28 total reviews (6 with comments)
Dr. Brennan's Performance
  • Trustworthiness
    EXCELLENT
  • Explains condition(s) well
    EXCELLENT
  • Answers Questions
    EXCELLENT
  • Time well spent
    EXCELLENT
Office & Staff Performance
  • Scheduling
    VERY GOOD
  • Office environment
    VERY GOOD
  • Staff friendliness
    VERY GOOD
  • Average wait time
    10 to 15 minutes
Patient Comments (6)
in NY |
Phenomenal doctor, PA and staff. Absolutely love this group. Underwent bi-lateral partials on May 16 th,2017 and actually going back to work tomorrow. Very informative from the day we met and did not push surgery from day 1. Always explained any questions I had to the fullest. Was treated for over a year getting gel shots and cortisone to easy the pain. He always told me when your ready for surgery you'll come in and tell me which is exactly what happened. Terrific PA & all other staff.
Southampton, NY |
Went to see this doctor on a recommendation by several people I know. He was extremely caring and listened. He helped me very much with my shoulder without surgery.
in Sag Harbor, NY |
Dr. Brennan did my total hip replacement. I could not be happier with the outcome. Dr. Brennan is a skilled surgeon. He is friendly and down to earth. He will spend as much time with you as you need. I actually look forward to my follow-up visits. He is great.
in Hamptons, NY |
Very thorough doctor and great bedside manner. Found a fracture of my son's ankle that other doctors missed. A+!
Wallington, NJ |
This Dr completely misdiagnosed me. also, I was waiting to have a consult with a hip specialist in the city since Brennan told me he's not doing hip surgery anymore (good thing) and needed a renewal for pain meds until I was able to see the new dr and his secretary told me he would not give anymore and that SHE lives with pain everyday. Very professional (ha) I asked her to have him call me 3 times and he never called me back. If I were you I would look for a different dr fast.
in New York, NY |
Dr. Brennan is an outstanding Medical Professional. Not only have my experiences with him been outstanding but his staff and receptionist were of the highest quality. They were very professional and very friendly. Dr. Brennan took a personal interest in my case and made sure that it was handled quickly and efficiently. I wish had more specialties as i would make him my primary care in a heartbeat!
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Now Accepting New Patients
Dr. Brennan accepts 18 insurance carriers
  • Aetna
    Aetna HMO
    Choice Plus POS II
  • Anthem
    Pathway X Ind PPO Direct Access CT
  • Blue Cross Blue Shield
    Blue Card PPO
  • Capital District Physician's Health Plan (CDPHP)
    Capital District Physician's Health Plan (CDPHP) HMO
  • Cigna
    Cigna HMO
    Cigna PPO
    Great West Healthcare-Cigna PPO
    Open Access Plus
  • Commercial Insurance Company
  • Connecticare
    Connecticare HMO
  • EmblemHealth
    Emblem Health
    GHI PPO
    Health Insurance Plan of Greater New York (HIP) PPO
  • Empire Blue Cross Blue Shield
    Empire Blue Cross Blue Shield HMO
    Prism Blue Priority EPO
  • HealthFirst
  • Humana
    Choice Care PPO
  • Locals (any local)
  • MagnaCare
    MagnaCare PPO
  • Medicaid
  • MultiPlan
    MultiPlan PPO
    PHCS Network PPO
  • Oxford Health Plans
    Freedom Plan
  • POMCO Group
  • UnitedHealthCare
    Choice Plus POS
    Navigate HMO
    Navigate POS
    Options PPO
    Oxford Liberty
    United Healthcare

*Please verify this information when scheduling an appointment.

Hospitals where Dr. Brennan has admitting privileges

Saint Charles Hospital
200 Belle Terre Rd
Port Jefferson, NY 11777
View Hospital Profile

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