Orthopaedic & Neursurgery Specialists

ONS Greenwich

Orthopedic Surgery, Neurosurgery · 21 Providers

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Today's Office Hours: 08:30 AM - 05:30 PM
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Office Provider Reviews


based on the average of 349 provider reviews for Orthopaedic & Neursurgery Specialists

Review of Dr. Kowalsky

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Dr. Kowalsky is not only a terrific surgeon, he is a very thorough doctor who takes time to explain the procedure in detail until the patient is both knowledgeable and comfortable. I highly recommend Dr. Marc Kowalsky. You won't be disappointed! Fred Camillo Old Greenwich, CT
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Review of Dr. Berliner

- in DARIEN , CT |

Dr. Berliner did an anterior hip replacement on me in January and I could not be happier with the results. He is a complete professional, treating me with the upmost respect and care. He is patient, kind, competent and totally without ego. I highly recommend him.
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Review of Dr. Delos


Dr. Delos is a excellent person and doctor. Always on time for appointments. Awesome bedside manners. I never felt rushed. Always took the time to answer all of my questions. The facilities and staff were equally professional.
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Review of Dr. Sethi

- in Westport, CT |

What an all star! I had a lot of shoulder trauma in my youth requiring 4 extensive surgeries in the 80s and 90s. All of these repairs led me to a serious arthritic situation requiring me to have a total shoulder replacement in my 50s. After careful review, I selected Paul Sethi at ONS. A great choice! The operation took place in their Stamford medical suite so no risk from all of those infectious transmissions that can show up in the hospital. Paul was extremely thorough in his diagnostic prep and model building leading to a very smooth procedure. What blew me away was that I NEVER had any pain after the operation! My rehab was smooth and my therapist says he has never seen such a phenomenal total shoulder replacement in terms of range of motion, fast recovery and overall strength. The frequent office follow ups were reassuring and conservative. I could not be happier and recommend Dr. Sethi wholeheartedly!!! This guy is a winner.
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Review of Dr. Kowalsky

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After receiving no relief from a major NYC Ortho hospital for a severe case of tennis elbow, I found Dr. Kowalsky. He assured me that even at my age, 66, there was no reason that my tennis days had to be behind me. He performed surgery flawlessly, and I was back on the tennis court in 3 months, playing some of the best tennis I have played in years. I will be eternally grateful to him for not putting me out to pasture and I will continue to recommend him to others. He is kind, caring and an excellent surgeon. Simply the best!
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Dr. Kowalsky:
Thank you for your kind words about Dr. Kowalsky and for sharing your experience. Congratulations on your recovery!... more
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Review of Dr. Kavanagh

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Dr. Kavanagh is an amazing doctor and a great example of really caring about his patients. I had a hip replaced in February 2019 and a knee replaced in June 2019. With Dr. Kavanagh's one of a kind surgical skill and his after surgery care I am healed. My right leg is like new. Thank you Dr. K!
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Dr. Kavanagh:
We are so pleased to read of your experience with Dr. Kavanagh and ONS. Congratulations on your recovery!... more
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Review of Dr. Delos


Dr. Delos explained my displaced meniscus injury and his recommendations for fixing it so that I could get back to doing what I could before. He was very clear and very positive in his description, diagnosis and surgery to be done. I had been suffering for over a month and received several other recommendations from another doctor. I felt confident that the surgery he recommended would fix the issue. He also was able to get me in for the surgery within the week. Arthroscopic surgery went well, physical therapy went well and I was able to walk without a cane and drive in 2 weeks. No pain after surgery. It was important to get to PT quickly after surgery and to follow the plan outlined by the therapist. I would recommend Dr. Delos for a knee injury.
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Dr. Delos:
Thank you so much for taking the time to share your ONS experience with Dr. Delos. We are so pleased your knee is feeling better.... more
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Review of Dr. Kavanagh

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I attribute my remarkably quick, almost painless recovery from total hip replacement to Dr. Kavanaugh's expertise. Every office visit was efficient. Dr. Kavanaugh listened to all of my numerous concerns and addressed each of them, patiently and concisely. He was quite assuring and honest in terms of his preferences for how he approaches certain aspects of the procedure. I asked if I might speak to one of his patients who was a tennis player and had returned to tennis, as is my goal. He complied and I received a call from a patient who had had three surgeries with Dr. Kavanaugh and gave him glowing reviews. Post surgery, he visited me within hours. An added bonus: my wife, who is in the skin care business, says the scar from my surgery is so minimal and healing so well that she'd have Dr. Kavanaugh work on her face if she ever needed it, lol!
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Dr. Kavanagh:
On behalf of Dr. Kavanagh and all of us at ONS, thank you so much for taking the time to share your experience. We are so pleased to hear of your swift recovery.... more
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Review of Dr. Delos

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Dr. Delos was fantastic. He made an expert repair on my torn tendon and the follow up and follow through with the Dr. and with ONS PT was outstanding.
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Dr. Delos:
Jon, thank you for your glowing review of Dr. Delos and ONS PT.... more
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Review of Dr. Kavanagh

- in New York, NY |

Dr. Kavanagh did a total right knee replacement for me in April. Prior to my surgery, I was given a very comprehensive packet of information and attended a class outlining what the procedure and aftercare would be. A bending machine was sent to my home, set up, and I was taught how to use it. My surgery went very well, and I received excellent care in Greenwich hospital along with several sessions of physical therapy. I also received at home PT and then outpatient PT as well. I was driving within three and a half weeks. My follow-up visits went very well. I highly recommend Dr.Kavanagh.
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Learn About Orthopaedic & Neursurgery Specialists

210 Procedures

  • Achilles Tendon Reconstruction
  • Achilles Tendon Rupture Repair
  • Achilles Tenotomy
  • Acl Surgery
  • All Shoulder Or Elbow Replacement Procedures
  • Ankle Arthroscopy
  • Ankle Fracture Repair
  • Ankle Fusion
  • Ankle Ligament Reconstruction
  • Ankle Replacement
  • Ankle Surgery
  • Arm Surgery
  • Arthritic Hand Reconstruction
  • Arthroscopic Joint Surgery
  • Arthroscopic Knee Shaving
  • Arthroscopic Labrum Repair
  • Arthroscopic Meniscus Repair
  • Arthroscopic Rotator Cuff Repair
  • Arthroscopic Shoulder Surgery
  • Arthroscopic Surgery
  • Arthroscopic Wrist Surgery
  • Bi-Compartmental Knee Replacement
  • Bicep Repairs
  • Brain Surgery
  • Brain Tumor Surgery
  • Bunion Surgery
  • Bunionette Correction
  • Calcaneal Osteotomy
  • Carotid Ultrasound
  • Carpal Tunnel Release
  • Carpal Tunnel Release Surgery, Endoscopic
  • Carpal Tunnel Release Surgery, Open
  • Cerebrospinal Fluid (Csf) Shunt - Insertion, Repair Or Removal
  • Cervical Herniated Disc Surgery
  • Cervical Spine Reconstruction
  • Computer-Assisted Total Knee Replacement
  • Congenital Hand Surgery
  • Cortisone Injection
  • Craniectomy, Craniotomy, Surgery Of Skull Base, Neuroendoscopy
  • De Quervain'S Release
  • Debridement
  • Disc Replacement
  • Disc Surgery
  • Dressing And-Or Debridement Of Wound, Infection, Or Burn (Incl. Negative Pressure Wound Therapy)
  • Dupuytren'S Contracture Injection
  • Dural Repair Or Other Spinal Cord Repair
  • Elbow Arthroscopy
  • Elbow Fracture And Dislocation Treatment
  • Elbow Fracture And-Or Dislocation Treatment, Closed
  • Elbow Fracture And-Or Dislocation Treatment, Open
  • Elbow Ligament Reconstruction
  • Elbow Reconstruction
  • Elbow Replacement
  • Elbow Surgery
  • Elbow Tenotomy
  • Emg (Electromyography)
  • Endoscopic Hand Surgery
  • Endoscopic Plantar Fasciotomy
  • Endoscopic Wrist Surgery
  • Epidural Block, Facet Blocks
  • Epidural Cortisone Injection
  • Epidural Steroid Injections
  • Excision Of Humerus
  • Excision Of Metacarpal And Carpal
  • Excision Of Radius Or Ulna
  • Excision Of Scapula, Clavicle, Rib, Or Sternum
  • Excision Of Tarsal Or Metatarsal
  • Excision Of Tibia Or Fibula
  • Facet Block
  • Facet Joint Injection
  • Finger Joint Fusion
  • Fluoroscopic-Guided Hip Injection
  • Foot And Ankle Dislocationtreatment, Open
  • Foot And Ankle Fracture And Dislocation Treatment
  • Foot And Ankle Fracture Treatment, Closed
  • Foot And Ankle Fracture Treatment, Open
  • Foot And Ankle Ligament And Tendon Repair
  • Foot And Ankle Reconstruction
  • Foot And Ankle Surgery
  • Foot Surgery
  • Forefoot Reconstruction
  • Fracture And-Or Dislocation Treatment
  • Fracture Care
  • Fracture Open Reduction And Internal Fixation (Orif)
  • Glenoid Labrum Repair
  • Hammer Toe Repair
  • Hand And Elbow Microvascular Surgery
  • Hand And Wrist Fracture And Dislocation Treatment
  • Hand And Wrist Fracture Treatment, Closed
  • Hand And Wrist Fracture Treatment, Open
  • Hand And Wrist Fusion
  • Hand Or Wrist Tendon Transfer
  • Hand Reconstruction
  • Hand Surgery
  • Hand Tendon Repair
  • Hand, Elbow, And Shoulder Microvascular Surgery
  • Herniated Disc Surgery
  • Hip Arthroscopy
  • 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
  • Hip Surgery
  • Injection Of Tendon
  • Joint Drainage
  • Joint Injection
  • Knee And Leg Fracture And Dislocation Treatment
  • Knee And Lower Leg Fracture Treatment, Closed
  • Knee And Lower Leg Fracture Treatment, Open
  • Knee Arthroscopy
  • Knee Cartilage Implantation
  • Knee Cartilage Repair
  • Knee Cartilage Treatment
  • Knee Debridement
  • Knee Dislocation Treatment
  • Knee Ligament Reconstruction
  • Knee Osteotomy
  • Knee Replacement
  • Knee Replacement Revision
  • Knee Surgery
  • Knee Tendon Repair
  • Kyphoplasty
  • Kyphoplasty, Percutaneous
  • Lamina Procedures (Incl. Laminectomy, Laminoplasty, Laminotomy)
  • Laminectomy
  • Ligament Reconstruction
  • Lumbar Epidural Steroid Injection
  • Lumbar Facet Joint Injection
  • Lumbar Laminectomy
  • Lumbar Selective Nerve Root Block
  • Metatarsal Osteotomy
  • Metatarsal Surgery
  • Microdiscectomy
  • Midfoot Fracture And-Or Dislocation Surgery
  • Mini Knee Surgery
  • Minimally Invasive Spine Surgery
  • Morton’S Neuroma Surgery
  • Myofascial Trigger Point Injection
  • Neck Surgery
  • Nerve Block, Somatic
  • Nerve Destruction By Neurolytic Agent
  • Nerve Reconstruction
  • Nerve Surgery
  • Neurostimulation
  • Open Reduction Internal Fixation (Orif) Of Metatarsal Fracture
  • Osteotomy
  • Partial Knee Replacement
  • Partial Shoulder Replacement
  • Peripheral Nerve Block
  • Platelet-Rich Plasma Injection (Prp)
  • Posterior Tibial Tendon Reconstruction
  • Reconstructive Ankle Surgery
  • Reconstructive Foot Surgery
  • Repair Intracranial Aneurysm
  • Resection Or Ablation Of Bone Tumor, Partial Or Complete Resection Of Bone, Debridement Of Bone
  • Reverse Total Shoulder And Total Shoulder Replacement
  • Revision Of Shoulder Or Elbow Replacement
  • Revision Surgery
  • Rotator Cuff And Labral Repair
  • Rotator Cuff Surgery
  • Sacroiliac Joint Injection
  • Separated Femoral Epiphysis Treatment
  • Shoulder Cartilage Treatment
  • Shoulder Dislocation Treatment
  • Shoulder Fracture And Dislocation Treatment
  • Shoulder Fracture Treatment
  • Shoulder Reconstruction
  • Shoulder Replacement
  • Shoulder Resurfacing
  • Shoulder Stabilizations
  • Shoulder Surgery
  • Simple Fracture Care And Casting
  • Spinal Compression Fracture Repair
  • Spinal Cord Stimulation
  • Spinal Decompression
  • Spinal Discectomy
  • Spinal Fusion
  • Spinal Injections
  • Spinal Nerve Block
  • Spinal Reconstructive Surgery For Deformities
  • Spinal Tumor Surgery
  • Spine Fracture Treatment
  • Spine Surgery
  • Sports Medicine Related Procedures
  • Sports Medicine Surgery
  • Stem Cell Transplant
  • Stereotactic Radiosurgery
  • Stereotactic Radiosurgery, Spinal Or Cranial
  • Stereotactic Surgery
  • Stereotaxis
  • Steroid Injection
  • Subtalar Arthrodesis
  • Tendon Repair
  • Tendon Surgery
  • Tommy John Surgery
  • Transcutaneous Electrical Nerve Stimulation (Tens)
  • Tricep Repair
  • Trigger Finger Release
  • Trigger Point Injection
  • Ultrasound-Guided Injection
  • Uni-Compartmental Knee Replacement
  • Viscosupplementation With Hyaluronate
  • Wrist And Forearm Tenotomy
  • Wrist Fusion
  • Wrist Ligament Reconstruction
  • Wrist Reconstruction
  • Wrist Replacement
  • Wrist Surgery


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Orthopaedic & Neursurgery Specialists accepts 15 insurance carriers

  • Aetna
  • Anthem
  • Anthem Blue Cross Blue Shield
  • Blue Cross Blue Shield
  • Cigna
  • Connecticare
  • EmblemHealth
  • First Health (Coventry Health Care)
  • Golden Rule
  • Harvard Pilgrim Health Care
  • Medicaid
  • Oxford Health Plans
  • Tufts Health Plan
  • UnitedHealthCare
  • Worker's Compensation
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