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Dr. John Brennan, MD

Orthopedic Surgery*MaleAge 56

Orthopedic Surgery*

Dr. John Brennan, MD is an orthopedic surgery specialist in East Setauket, NY. He is affiliated with medical facilities such as Saint Charles Hospital and St. Catherine of Siena Hospital. He is accepting new patients and telehealth appointments.

Dr. John Brennan, MD

Practice

6 Technology Dr Ste 100 East Setauket, NY 11733
Telehealth services available

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Telehealth services available

Accepting new patients

Experience and Background Checks

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*The information displayed here is sourced from independent information providers, such as state board websites, as of November 2023, and may not be the most up-to-date information. Healthgrades makes no representations with respect to the accuracy of any information provided here and assumes no responsibility or liability for such information.

Dr. Brennan's Reviews

Likelihood to recommend Dr. Brennan

4.8

80 ratings, 52 with a written review
5 Star
94%
94%
4 Star
1%
1%
3 Star
0%
0%
2 Star
1%
1%
1 Star
4%
4%
What went well
No reviews yet
What could be improved
No reviews yet

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RecentHighestLowestMost Helpful
Reply
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 person found this helpful
Helpful
Denise M Smith – Nov 21, 2023
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Reply
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 people found this helpful
Helpful
Jared Gibbs – Jun 02, 2023
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Reply
What went well
  • Listened & answered questions
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Feb 03, 2023
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Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Victoria Caldwell – Jun 20, 2022
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Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Bruce Gruner – Nov 30, 2021
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Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 person found this helpful
Helpful
Michele Dollard – Jun 03, 2021
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Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 person found this helpful
Helpful
Feb 24, 2021
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Reply
What went well
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Oct 25, 2020
×Post a ResponseAre you Dr. John Brennan, MD?
Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
William Ferguson – Sep 03, 2020
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Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Aug 26, 2020
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Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Aug 26, 2020
×Post a ResponseAre you Dr. John Brennan, MD?
Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
4 people found this helpful
Helpful
Phil Catanese – Mar 05, 2020
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Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
2 people found this helpful
Helpful
Kim – Feb 27, 2020
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Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
4 people found this helpful
Helpful
Anonymous – Mar 27, 2019
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Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 person found this helpful
Helpful
NY – Mar 27, 2019
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Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
3 people found this helpful
Helpful
James J. – Mar 22, 2019
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Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
3 people found this helpful
Helpful
Michael F. – Feb 08, 2019
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Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Laurence H. – Jan 23, 2019
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Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 people found this helpful
Helpful
Anonymous – Jan 23, 2019
×Post a ResponseAre you Dr. John Brennan, MD?
Reply
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 people found this helpful
Helpful
V. R. – Jan 10, 2019
×Post a ResponseAre you Dr. John Brennan, MD?

Leave a review

How was your experience with Dr. Brennan?

About Me

Care Philosophy

John Brennan, MD, received his medical degree from SUNY Health Science Center at Brooklyn after attending college at St. Louis University. He then performed...Read more

Biography

John Brennan, MD, received his medical degree from SUNY Health Science Center at Brooklyn after attending college at St. Louis University. He then performed...Read more

Specialties*

  • Orthopedic Surgery
  • Sports Medicine

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

Board Certifications

American Board of Medical Specialties®
American Board of Orthopaedic Surgery®
Orthopaedic Sports Medicine
Orthopedic Surgery

St Lukes Roosevelt Hospital Center

Internship Hospital

  • American Association of Hip and Knee Surgeons, Member
  • Irish-American Orthopedic Society, Member
  • Medical Society of the State of New York, Member
  • Suffolk County Medical Society, Member

Common Questions and Answers

    Please call the office to learn more. (631) 689-6698

    What is the best way to schedule an appointment with Dr. John Brennan, MD?

    View contact information to make an appointment.

    What other Orthopedic Surgery Specialists practice nearby?

    Compare with other Orthopedic Surgery Specialists.

    Can I use my insurance at Dr. John Brennan, MD?

    Dr. John Brennan, MD accepts various insurance plans. You can easily check if your insurance provider is accepted by using the Healthgrades insurance check. We recommend verifying your insurance coverage before scheduling an appointment to ensure a seamless experience.

    What is Dr. John Brennan, MD's office address?

    Dr. Brennan's office is located at 6 Technology Dr Ste 100, East Setauket, NY 11733. You can find other locations and directions on Healthgrades.

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    Locations

    Practice

    Orthopedic Assoc. of Long Island Physicians and Medical Group Pllc6 Technology Dr Ste 100 East Setauket, NY 11733
    1
    • Call
    • Fax
    • Hours
      • Mon: 9:00am - 5:00pm
      • Tue: 9:00am - 5:00pm
      • Wed: 9:00am - 5:00pm
      • Thu: 9:00am - 5:00pm
      • Fri: 9:00am - 5:00pm
    • Directions

    Practice

    St. Charles Hospital200 Belle Terre Rd Port Jefferson, NY 11777
    2

    St. Charles Orthopedics

    St. Charles Orthopedics325 Meeting House Ln Bldg 1BLDG1 Southampton, NY 11968
    3

    St. Charles Orthopedics

    St. Charles Orthopedics74 Commerce Ave Ste 4 Riverhead, NY 11901
    4
    • Call
    • Fax
    • Hours
      • Mon: 9:00am - 5:00pm
      • Tue: 9:00am - 5:00pm
      • Wed: 9:00am - 5:00pm
      • Thu: 9:00am - 5:00pm
      • Fri: 9:00am - 5:00pm
    • Directions

    Affiliated Hospitals

    Saint Charles Hospital

    200 Belle Terre Rd
    Port Jefferson, NY 11777
    Recipient of 1
    hospital award

    How patients felt about the care they received at this hospital.

    86%
    Patients said they were given information about recovering at home

    2% higher than the national average

    77%
    Patients said that nurses always listened to them and explained things well

    3% higher than the national average

    View all patient feedback

    Stony Brook University Hospital

    101 NICOLLS ROAD
    Stony Brook, NY 11794
    Recipient of 28
    hospital awards

    America's 250 Best Hospitals Award™ (2024, 2023, 2022)

    Top 1% in the nation for providing the highest clinical quality year over year

    America's 50 Best Hospitals Award™ (2024, 2023)

    Top 1% in the nation for providing the highest clinical quality year over year

    View all awards

    How patients felt about the care they received at this hospital.

    86%
    Patients said they were given information about recovering at home

    2% higher than the national average

    74%
    Patients said that doctors always listened to them and explained things well

    1% lower than the national average

    View all patient feedback

    St. Catherine of Siena Hospital

    50 Route 25A
    Smithtown, NY 11787
    Recipient of 2
    hospital awards

    How patients felt about the care they received at this hospital.

    84%
    Patients said they were given information about recovering at home
    76%
    Patients said that nurses always listened to them and explained things well

    2% higher than the national average

    View all patient feedback
    Learn more about how Healthgrades measures Hospital Quality.