Dr. John Brennan, MD

Dr. John Brennan, MD

Orthopedic Surgery  |  
Male  |  
Age 50
(29)
Insurances AcceptedSave
Dr. John Brennan, MD is an orthopedic surgery doctor who practices in Riverhead, NY. He is 50 years old and has been practicing for 19 years.Read his story

74 Commerce Ave Ste 4

Riverhead, NY 11901

Contact Information

(631) 689-6698

Insurance Accepted

  • Aetna
  • Anthem
  • Blue Cross Blue Shield
  • Capital District Physician's Health Plan (CDPHP)
  • Cigna
  • Commercial Insurance Company
  • Connecticare
  • EmblemHealth
  • Empire Blue Cross Blue Shield
  • 9 More

*Please verify this information when scheduling an appointment.

Learn about Dr. Brennan

Be confident in your decisions by checking out your provider's top areas of care, education, patient reviews and more. Learn about finding the right doctor for you

Top Care Areas

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See how frequently Dr. Brennan performs your care needs compared to other doctors.

Joint Pain
very high
more than 98% of peers
Sprains and Strains (incl. Muscle Tear)
very high
more than 97% of peers
Patellofemoral Pain Syndrome or Knee Pain
very high
more than 97% of peers

Dr. Brennan's percentages are based on the rate of treatment compared to peers nationwide from insurance data. Learn more info about our data and this Top Care Areas component.

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Dr. Brennan's bio

This content was provided by Dr. Brennan "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."

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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*
107

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
  • Arthritis of the Elbow
  • 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
  • Coccyx or Sacrum Fracture
  • Complications of Joint Prosthesis
  • De Quervain's Disease
  • Degenerative Disc Disease
  • Elbow Bursitis
  • Elbow Injuries
  • Elbow Sprain
  • Enthesopathy of Hip (incl. Trochanteric Bursitis)
  • Enthesopathy of Knee (incl. Bursitis of Knee)
  • 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
  • Heel Spur
  • 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
  • Neck Muscle Strain
  • Osteoarthritis
  • Osteoarthritis of Ankle and Foot
  • Osteoarthritis of Hand or Wrist
  • Osteoarthritis of Hands
  • Osteoarthritis of Hip
  • Osteoarthritis of Hip and Thigh
  • Osteoarthritis of Knee
  • Osteoarthritis of Shoulder
  • 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
  • Sciatica (Not Due to Disc Displacement)
  • Scoliosis
  • Shoulder Dislocation
  • Shoulder Disorders
  • Shoulder Impingement Syndrome
  • Shoulder Tendinitis and Tenosynovitis
  • Sjögren's Syndrome
  • Spina Bifida
  • Spinal Cord Injury
  • Spinal Stenosis
  • Spine Deformities
  • Spine Disorders
  • Spine Fractures, Traumatic
  • Spondylitis
  • Spondylolisthesis
  • Spondylosis
  • Sprains and Strains (incl. Muscle Tear)
  • Systemic Chondromalacia
  • Tibia and Fibula Fractures
  • Trigger Finger
  • Wrist Fracture

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46

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, Closed
  • Elbow Fracture and-or Dislocation Treatment, Open
  • Excision of Femur or Knee
  • Foot and Ankle Dislocation Treatment, Closed
  • Foot and Ankle DislocationTreatment, Open
  • 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
  • Separated Femoral Epiphysis Treatment
  • Shoulder Fracture Treatment
  • Shoulder Fracture and Dislocation Treatment
  • Steroid Injection
  • Trigger Finger Release
  • Trigger Point Injection
  • Viscosupplementation With Hyaluronate

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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
4.5
based on 29 total reviews (7 with comments)

Likelihood to Recommend (29)

  • 5
    (24)
  • 4
    (1)
  • 3
    (0)
  • 2
    (1)
  • 1
    (3)

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 (7)

in Riverhead |
Excellent surgeon, great sense of humor, outstanding attention to detail. From the day of the consult I was fast-tracked for hip replacement surgery, solely due to Dr. Brennan realizing the extent of the pain I was in. In St. Charles on 10/31, home on 11/1. Walking with a walker for 2 weeks, a cane...more
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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...more
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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.
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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.
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in Hamptons, NY |
Very thorough doctor and great bedside manner. Found a fracture of my son's ankle that other doctors missed. A+!
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Visit Dr. Brennan

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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