Dr. John J Brennan MD Orthopedic Surgeon

Dr. John Brennan is an orthopedic surgeon in East Setauket, New York. He is affiliated with multiple hospitals in the area, including John T. Mather Memorial Hospital and Peconic Bay Medical Center. He received his medical degree from State University of New York Downstate Medical Center College of Medicine and has been in practice for 21 years. Dr. Brennan accepts several types of health insurance, listed below. He is one of 22 doctors at John T. Mather Memorial Hospital and one of 20 at Peconic Bay Medical Center who specialize in Orthopedic Surgery.

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Office Location

See Contact Information

Specialty & Clinical Interests

Orthopedic Surgeon: Orthopedic Spine Surgery

Hospital Affiliation

John T. Mather Memorial Hospital

Peconic Bay Medical Center

St. Charles Hospital
High performing in Orthopedics

Education & Medical Training

St Luke's-Roosevelt Hospital Center
Residency, General Surgery, 1993 - 1995

St Luke's-Roosevelt Hospital Center
Residency, Orthopedic Surgery, 1995 - 1999

State University of New York Downstate Medical Center College of Medicine
Class of 1993

Certifications & Licensure

American Board of Family Medicine
Certified in Family Medicine

American Board of Family Medicine
Certified in Sports Medicine

AZ State Medical License
Active through 2014

Insurances Accepted

  • Aetna Choice POS II
  • Aetna HMO
  • BCBS Blue Card PPO
  • BCBS Texas BlueChoice
  • CIGNA HMO
  • CIGNA Open Access
  • CIGNA PPO
  • Empire BCBS HMO
  • Empire BCBS PPO
  • First Health PPO
  • GHI PPO
  • Great West PPO
  • HIP of New York - Select PPO
  • Humana ChoiceCare Network PPO
  • MagnaCare PPO
  • Multiplan PHCS PPO
  • Multiplan PPO
  • MVP Healthcare PPO
  • Oxford Health Freedom
  • Oxford Health Liberty
  • United Healthcare - Direct Choice Plus POS
  • United Healthcare - Direct Options PPO
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