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Dr. John Brennan, MD
Orthopedic Surgery* Age 59
Dr. John Brennan, MD
5.0 (2 Ratings)

Offers telehealth

Dr. John Brennan, MD is an Orthopedic Surgeon in Riverhead, NY.
Dr. John Brennan, MD
5.0 (2 Ratings)

Dr. John Brennan, MD

Orthopedic Surgery* Age 59
Riverhead, NY
Accepting new patients

Offers telehealth

Dr. John Brennan, MD is an Orthopedic Surgeon in Riverhead, NY.

About Dr. John Brennan, MD

Dr. John Brennan, MD is an Orthopedic Surgeon in Riverhead, NY. Dr. Brennan currently practices at OALI Riverhead and is affiliated with St Charles Hospital and St. Catherine of Siena Hospital. Dr. Brennan has experience treating conditions like Joint Pain, Meniscus Tear, Knee Ligament Tears, Miner's Knee, Osteoarthritis of Knee, Internal Derangement of Knee and Low Back Pain among other conditions at varying frequencies. At present, Dr. Brennan received an average rating of 5.0/5 from patients and has been reviewed 2 times. Dr. Brennan's office accepts new patients and telehealth appointments. Dr. Brennan is board certified in Orthopaedic Sports Medicine and accepts multiple insurance plans.

Offers Telehealth

This provider offers telehealth appointments. Call the office to schedule.

Explains Conditions Well

Patients said this doctor explains conditions well.

Trustworthy

Patients said this doctor is trustworthy.

Friendly Staff

Patients said the staff was friendly.

Easy Scheduling

Patients said scheduling was easy.

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Experience Check

Enter a condition or procedure
Joint Pain
Arthrocentesis
Meniscus Tear
Joint Pain
Arthrocentesis
Meniscus Tear
Knee Ligament Tears
Miner's Knee
Osteoarthritis of Knee
Internal Derangement of Knee
Low Back Pain
Osteoarthritis
Meniscectomy
Limb Pain
Osteoarthritis of Shoulder
Lumbar Radiculopathy
Rotator Cuff Surgery
Knee Arthroscopy
Hip Sprain
Radiculopathy
Bursitis
  • View other providers who treat Bursitis
Viscosupplementation With Hyaluronate
Shoulder Arthroscopy
Osteoarthritis of Hip
Knee Tendinitis
Chronic Neck Pain
Glenoid Labrum Tear
Knee Sprain
Rotator Cuff Tear
Rotator Cuff Tendinosis
Shoulder Impingement Syndrome
Bursitis of Hip
Hip Tendinitis
Trigger Finger
Lumbosacral Stenosis
Steroid Injection
Wrist Sprain or Strain
Ankle Fracture
Patellofemoral Pain Syndrome (PFPS)
Patellar Disorders
Fibular Fracture
Patellar Chondromalacia
Sacral Fracture
Sciatica
  • View other providers who treat Sciatica
Intervertebral Disc Disease
Spinal Stenosis
Herniated Disc
Tibial Fracture
Lumbar Spinal Stenosis
Baker’s Cyst
Degenerative Disc Disease
Hip Replacement
Trigger Finger Release
Chondromalacia
Knee Replacement
Lateral Epicondylitis
Leg Fracture Below Knee (incl. Ankle)
Rupture of Achilles Tendon
Anterior Cruciate Ligament (ACL) Tear
Shoulder Tendinitis and Tenosynovitis
Humerus Fracture
Nerve Root Injury and Plexus Disorders (incl. Pinched Nerve)
Osteoarthritis of Spine
Adhesive Capsulitis Shoulder
Pelvic Fracture
Femur Fracture
Carpal Tunnel Syndrome
Wrist Fracture
Back Pain
Hip Fracture
Ankle Sprains and Strains
Spondylolisthesis
Spinal Osteophyte
Medial Collateral Ligament (MCL) Sprain
Cervical Radiculopathy
Broken Arm
Shoulder Fracture
Spine Deformities
Partial Knee Replacement
Osteoarthritis of Hand
Lumbosacral Radiculopathy
Rheumatoid Arthritis
AC Joint Injury
Achilles Tendinitis
Ankle Sprain and Achilles Tendon Sprain or Rupture
Arthritis
Autoimmune Diseases
Avascular Necrosis
Avascular Necrosis of Femoral Head
Biceps Tendon Rupture
Bone Disorders
Bone Spur
Cartilage Tear
Chondrocalcinosis
Chronic Pelvic Pain
Clavicle Fracture
Complications of Joint Prosthesis
De Quervain's Disease
Difficulty With Walking
Dislocated Joint
Elbow Bursitis
Elbow Injuries
Elbow Sprain
Enthesopathy of Hip (incl. Trochanteric Bursitis)
Enthesopathy of Knee (incl. Bursitis of Knee)
Femoral Neck Fracture
Femoral Stress Fracture
Foot Conditions
Foot Fracture
Foot Infection
Foot Sprain
Fracture
  • View other providers who treat Fracture
Fracture of Hand and Fingers
Gait Abnormality
Ganglion Cyst
Genu Valgum
Gout
  • View other providers who treat Gout
Hammer Toe
Hand Conditions
Hand Fracture
Heel Spur
Hip Impingement
Hip Pointer
Iliotibial Band Syndrome
Knee Dislocation
Knee Disorders
Knee Fracture
Knee Osteophyte
Lateral and Medial Epicondylitis (Tennis and Golf Elbow)
Lateral Collateral Ligament (LCL) Sprain
Leg Fracture Above Knee (incl. Hip)
Lumbar Compression Fracture
Lumbar Spine Fracture
Medial Epicondylitis
Morton's Neuroma
Myelopathy
Neck Strain (incl. Whiplash Injury)
Non-Traumatic Rupture of Achilles Tendon
Osgood Schlatter Disease
Osteoarthritis of Ankle
Osteoarthritis of Elbow
Osteoarthritis of Foot
Osteoarthritis of Hand or Wrist
Osteoarthritis of Hip and Thigh
Osteoarthritis of Wrist
Osteochondritis Dissecans
Osteopenia
Patellar Fracture
Patellar Tendonitis
Peripheral Nerve Disorders
Piriformis Syndrome
Plantar Fasciitis
Posterior Cruciate Ligament (PCL) Tear
Posterior Tibial Tendonitis
Pyogenic Arthritis
Repeated Shoulder Dislocation
Rheumatoid Arthritis of Knee
Sacrum Disorders
Schmorl's Nodes
Shoulder Bursitis
Shoulder Dislocation
Shoulder Disorders
Shoulder Osteophyte
Snapping Hip
Spinal Stenosis with Neurogenic Claudication
Spine Disorders
Spondylitis
Spondylosis
Sprains and Strains (incl. Muscle Tear)
Systemic Chondromalacia
Tarlov Cyst
Tenosynovitis
Thoracic Compression Fracture
Thoracic Spine Fracture
Thoracic Stenosis
Thoracolumbar Radiculopathy
Tibia and Fibula Fractures
Tibia or Fibula Stress Fracture
Arm Surgery
Arthroscopic Shoulder Surgery
Biceps Tendon Repair
Carpal Tunnel Release
Elbow Tenotomy
Fracture Care
Hip Replacement with Robotic Assist
Joint Drainage
Knee and Leg Fracture and Dislocation Treatment
Knee and Lower Leg Fracture Treatment, Closed
Knee and Lower Leg Fracture Treatment, Open
Knee Surgery
Labrum Repair
Meniscus Surgery
Patellar and Quadriceps Tendon Repairs
Patellar Tendon Repair
Quadriceps Tendon Repair
Shoulder Dislocation Treatment
Shoulder Fracture and Dislocation Treatment
Shoulder Fracture Treatment
Total Knee Arthroplasty with Robotic Assist
Trigger Point Injection

Accepted Insurance Plans

* Please verify this information when scheduling an appointment.
  • Empire Hospital/Medical (Trad)
    Empire Blue Cross Blue Shield PPO
    Blue Acess Employer Sponsored
    Empire Hospital
  • Fidelis Care
  • SimplyBlue/Simply Blue Plus PPO
    BluePPO HSA PPO
  • MagnaCare PPO
  • HealthyBlue Advantage
  • Navigate HMO
    Options PPO
    Choice Plus POS
    Navigate Plus POS
  • Oscar Circle
  • Freedom
    Liberty
  • Select
    Savings Plus of Metro, NY
    Choice Plus POS II
    Aetna HMO
    Managed Choice (Open Access) POS
    Premier Care Network Plus - Innovation Health
    Open Choice PPO
    Elect Choice (Open Access) EPO
  • Cigna HMO
    Cigna PPO
    Open Access Plus
  • BlueCard PPO
  • HealthMate Coast to Coast
  • First Health (Coventry Health Care) PPO
  • MVP Health Plan EPO

Where Dr. John Brennan, MD Sees Patients

  1. 1 OALI Riverhead
    715 Roanoke Ave, Riverhead, NY 11901
  2. 2 OALI Southampton
    325 Meeting House Ln Bldg 1, Southampton, NY 11968
  3. 3 Orthopedic Associates of Long Island Llp
    6 Technology Dr Ste 100, East Setauket, NY 11733
    Monday
    09:00 - 17:00
    Tuesday
    09:00 - 17:00
    Wednesday
    09:00 - 17:00
    Thursday
    09:00 - 17:00
    Friday
    09:00 - 17:00
    Saturday
    00:00 - 00:00
    Sunday
    00:00 - 00:00

What Patients Say

Likelihood to recommend Dr. Brennan
5.0
Based on 2 Reviews
5 Stars (2)
4 Stars (0)
3 Stars (0)
2 Stars (0)
1 Star (0)

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Patient Reviews
Nov 20, 2023
My family has used Dr Brennan's services in the past. We think he's the best. I recently had arthroscopic surgery on a torn meniscus. He informed me of ALL my options before the surgery and I was treated very well. I was seen in a timely manner and my surgery went off without a single problem. He has a great bedside manner and I would definitely go to him again.
Denise M Smith — Nov 20, 2023
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Telehealth Options
This provider has not specified a telehealth appointment method. Would you still like to make an appointment with Dr. Brennan?
Call now to make an appointment
(631) 689-6698

Meet Dr. John Brennan, MD

Specialties*
Orthopedic Surgery
Sports Medicine
Specialties*
  • *Sharecare does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
Common Questions and Answers
Responses are sourced directly from patients.
Does Dr. Brennan communicate via email?
2 users said yes.
Yes
(2)
No
(1)
Does Dr. Brennan offer telehealth services or virtual visits?
2 users said yes.
Yes
(2)
No
(0)
Does Dr. Brennan offer an online patient portal?
2 users said yes.
Yes
(2)
No
(0)
Does Dr. Brennan have free onsite parking?
2 users said yes.
Yes
(2)
No
(0)
Does Dr. Brennan offer weekend visits?
1 user said yes.
Yes
(1)
No
(0)
Does Dr. Brennan offer evening visits?
2 users said yes.
Yes
(2)
No
(0)
Does Dr. Brennan specialize in working with children or adolescents?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Brennan specialize in working with seniors?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Brennan specialize in couples therapy?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Brennan specialize in working with LGBTQ+ community?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Brennan accept insurance?
No responses yet.
Yes
(0)
No
(0)

FAQs About Dr. Brennan's Practice

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Sharecare insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. John Brennan, MD. To arrange an appointment, call the number on Dr. Brennan's profile.

Dr. Brennan frequently treats the following conditions: Joint Pain, Meniscus Tear, Knee Ligament Tears, Miner's Knee, Osteoarthritis of Knee, Internal Derangement of Knee and Low Back Pain. See more on Sharecare.

Dr. John Brennan, MD is affiliated with St Charles Hospital and St. Catherine of Siena Hospital.

Yes, Dr. John Brennan, MD holds board certification in Orthopaedic Sports Medicine and Orthopedic Surgery.

Training & Medical Education
Board Certifications
  • Orthopaedic Sports Medicine and Orthopedic Surgery
Board Certifications
What’s a board certification and why is it important that my provider has one?

A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.
Internship
  • St Lukes Roosevelt Hospital Center
Internship

Hospitals Where Dr. John Brennan, MD Practices

  • St Charles Hospital

    200 Belle Terre Rd, Port Jefferson, NY

  • St. Catherine of Siena Hospital

    50 Route 25A, Smithtown, NY

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