Frank A. Ennis, MD

Dr. Frank Ennis specializes in hip and knee replacement, hip arthroscopy, complex revision arthroplasty of the hip and knee, and treatment of complications from hip fractures. He is fellowship-trained in adult reconstructive surgery.  Dr. Ennis is a staff orthopedic surgeon at Greenwich Hospital and was among the first orthopedic surgeons in the New York Metropolitan area to do computer-assisted surgery for total knee and hip replacement. This cutting edge technique uses computerized navigation to guide the surgeon which may improve the accuracy of joint replacement surgery.

After completing undergraduate studies at Yale University and post-baccalaureate pre-medical studies at Harvard University, Dr. Ennis graduated from Duke University School of Medicine. He completed his residency at Yale University Department of Orthopaedic Surgery. He completed Fellowship training in adult reconstructive surgery at New England Baptist Hospital in Boston.

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Tim Greene, MD

Tim Greene, MD is an orthopedic surgeon who is fellowship trained in sports medicine and hip arthroscopy, a technique that has revolutionized the treatment of various hip problems. Dr. Greene graduated Princeton University and earned his medical degree at the Medical College of Georgia. He performed a residency in orthopedics at Emory University and served as associate team physician to the athletic teams at Georgia Tech.

Dr. Greene completed fellowship training at the Steadman Hawkins Clinic in Vail, Colorado under the direction of Dr. Marc Philippon. While there, he served as associate team physician for the U.S. Ski Team.

Dr. Greene’s interest in sports medicine derives from his ongoing personal interest in sports. In college at Princeton University, he played varsity football, served as team captain and earned numerous awards for outstanding athletic achievement.

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Testimonials

Just took my daughter to an appointment with Dr. Tim Greene after a disappointing appointment at another orthopedic office not affiliated with ONS. If I was able to…I would give Dr. Greene and ONS a rating much higher than 5 Stars.

I could not have been more impressed with every aspect of my daughters care. The offices were clean & the staff was extremely welcoming & friendly. We were brought into the exam room early which in most cases doesn’t happen at a doctors office.

Dr. Greene came in and listened to our concerns/issues, examined our daughter and was in absolutely no rush to move on to his next patient. He answered all of our questions, explained the X-Rays to us and expressed genuine care for her injury and treatment. He made sure we understood everything and had a plan going forward.

We also had concerns about how to schedule MRI’s and other testing. He immediately sent a note to someone on his team to help us. We sat with Jessica who took her time and made all the arrangements for us. She also followed up the next day with info we needed to make sure everything was done right.

About 3 hours after our appt. with Dr. Greene my wife and I had a question we forgot to ask. We called the office after Dr. Greene had left but a message was taken and I was assured either Dr. Greene or his assistant would call back the next day. They called in the morning and answered everything for us.

Being an athlete and also a firefighter I have seen a lot of orthopedic surgeons and have been to many practices and I can say this was one of the best experiences I have had. In my opinion they go way above the standard of care. I would highly recommend Dr. Greene to anyone who may need orthopedic care. (Five star review from Google from patient Paul F.)

I am a Director of Critical Care and a seasoned RN as well. Dr. Greene is top notch- I send everyone to him that I can. He is humane, highly comprehensible, takes his time, explains things well and is clinically excellent! The surgery center he uses in Stamford was excellent, clean, great staff and everyone was in the same page! (5 Star Review on Google from Liza J-K)

I have been coming here for at least 15 years and have seen a variety of amazing doctors … Dr. Greene being a favorite in our household for years and would trust him with everything.  Recently I broke my elbow and was sent to Dr. Vadasdi.  She was amazing! Great with surgery and aftercare. Very compassionate throughout the whole process! Thank you ONS for getting me through everything! (ED)

The ONS team is like family. Dr.Greene is my hip doctor and he is excellent!! I feel that I am in great hands from the moment I walk in the doors.. Thank you ONS. (TA)

Doctors, Nurses, Therapists, and support staff: This is a big THANK YOU for all the expert and attentive care you extended towards my recovery from a broken pelvis and elbow after a spill on black ice in December ’09. Let everyone know, there is Zumba after broken bones heal. I received excellent care at Greenwich Hospital, with elbow surgery by Dr. Geene (yay for titanium). Each of you as a part of this “total team” took me from being in excruciating pain and bedridden to no pain and full function and then some! – (LA)

 

Dr. Greene: It has been 6 weeks since you mended my fractured left clavicle and I continue to make progress in my recovery. I estimate that my range of motion in the shoulder is close to 90% and I am beginning to cautiously build strength in the muscles affected by my injury. I wish you a wonderful Thanksgiving, and this year I am especially grateful for having such a great orthopedist as you. – (RG)

 

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Brian Kavanagh, MD

Brian F. Kavanagh, MD

Joint replacement specialist Brian Kavanagh, MD is a staff orthopedic physician at Greenwich Hospital where he has performed over 6000 surgeries over the past 25 years. Board-certified by the American Board of Orthopaedic Surgery, Dr. Kavanagh graduated Princeton University and attended University of Connecticut School of Medicine. His internship and residency were performed at the Mayo Clinic, Mayo Graduate School of Medicine in Rochester, Minnesota. He served on the full-time faculty at the Mayo Graduate School of Medicine for seven years and on the teaching staff at Yale University School of Medicine in New Haven for five years. He is a former consultant to the Department of Orthopedics at the Mayo Clinic, where he specialized in hip and knee reconstruction and was an instructor in the hip and knee total joint fellowship program.

Dr. Kavanagh has authored and edited numerous articles and book chapters and serves on the editorial staff of the Journal of Arthroscopy and the publication, Clinical Orthopaedcis and Related Research. He is an examiner for the American Board of Orthopaedic Surgery and a member of several specialty orthopedic societies.

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Marc S. Kowalsky, MD

Dr. Kowalsky is a board-certified orthopedic surgeon with expertise in surgical and nonsurgical treatment of upper and lower extremity sports injury, and complex shoulder and elbow conditions including degenerative disease, trauma, and revision surgery. He has a particular interest in the rehab-focused management of shoulder and elbow arthritis, instability, ligament and tendon injuries, as well as knee injuries and cartilage disorders. He has authored original research manuscripts, review articles, and textbook chapters focusing on AC joint reconstruction, rotator cuff repair, and shoulder replacement. He currently serves as a reviewer for the Journal of the American Academy of Orthopaedic Surgeons, Journal of Shoulder and Elbow Surgery and the American Journal of Sports Medicine.

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Paul M. Sethi, MD

Paul Sethi, MD is a board-certified orthopedic surgeon who specializes in sports medicine conditions of the elbow, knee and shoulder.  He is a leading research physician who speaks at academic and instructional medical conferences in the US and abroad. His research on surgical advances for the shoulder, elbow and knee is regularly published in leading medical journals including the Journal for Shoulder and Elbow Surgery, Arthroscopy, and the Journal of American Academy for Orthopaedic Surgery. He also collaborates with outside companies for education and research purposes and to develop medical procedures on the shoulder, elbow and knee. He is a member of the prestigious American Shoulder and Elbow Society and American Academy of Orthopedic Surgeons.  He is President of the  ONS Foundation for Clinical Research and Education.

Dr. Sethi completed a sports medicine fellowship at the Kerlan Jobe Orthopaedic Institute in Los Angeles, CA. His research on athletic performance while a resident surgeon at Yale, his studies of professional basketball players, and his experience as a college varsity athlete have provided Dr. Sethi with first-hand experience and an informed perspective for understanding sports-related injuries and conditions.

Dr. Sethi served as orthopedic consultant to the Los Angeles Dodgers baseball team and former assistant team physician of the Los Angeles Lakers basketball team, Los Angeles Kings hockey team, the Los Angeles Dodgers and University of Southern California football team.

Today Dr. Sethi serves as team physician to Greenwich High School, Brunswick High School and Iona Preparatory High School. In regular speaking engagements he asserts that proper fitness conditioning is essential to preventing sports injuries for professional as well as amateur athletes.

As President of the ONS Foundation for Clinical Research and Education, Dr. Sethi’s research has recently included clinical study of the use of a long lasting analgesic, Exparel, during surgery to reduce the need for opioids to control post surgical pain; the establishment of better methods for surgical skin preparation (cleaning) to lower the risk of surgical infection; development of a new technique to repair chronic or weakened biceps tendons; and the evaluation of surgical needles in tendon surgery to establish international guidelines on needle use.

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Katherine B. Vadasdi, MD

Director of the ONS Women’s Sports Medicine Center, Katherine Vadasdi, MD is an orthopedic surgeon who is fellowship trained in adolescent and adult sports medicine as well as shoulder and elbow surgery.

Dr. Vadasdi graduated Dartmouth College and earned her medical degree at Dartmouth Medical School. She performed a residency in orthopedics at the Hospital for Special Surgery (HSS) in New York and completed fellowship training in shoulder, elbow and sports medicine at Columbia University Medical Center, Department of Orthopedics. While at Columbia she was assistant team physician to Columbia University Athletics.  Dr. Vadasdi has been honored as a Castle Connolly America’s Top Doctor and Fairfield County Top Doctor annually since 2014.  In 2017, she was the recipient of the Fairfield County’s Doctor of Distinction Award.

As member of the Board of Directors at the ONS Foundation for Clinical Research and Education, Dr. Vadasdi is active in ongoing research, including the current groundbreaking study to curb opioid addiction among teens and athletes. She has been published in numerous prestigious industry journals such as the Journal of Shoulder and Elbow Surgery and the Journal of Orthopaedic Trauma. Additionally, Dr. Vadasdi serves as a mentor through the Foundation’s Research and Summer Internship Programs and during the Mini-Med School program, which provides 15 high school students the opportunity to participate in a one week workshop in orthopedics.

Dr. Vadasdi serves as the designated team doctor for Greenwich High School, Iona Preparatory School, Trinity Catholic High School and Convent of the Sacred Heart, and is a frequent guest speaker for local organizations, parent groups and at medical conferences.  She participates on a number of committees and boards, including the Greenwich Hospital Women’s Health Initiative Board of Directors and the Hospital’s Peer Review Board.

Dr. Vadasdi’s area of medical specialty reflects her personal interests.  She is an accomplished triathlete, having completed Ironman competitions in 2007 and 2009. Dr. Vadasdi is also an alpine climber and has ascended Mount Kilimanjaro, Mount Rainier and the Grand Teton, among others.

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Testimonials

I have been coming here for at least 15 years and have seen a variety of amazing doctors … Dr. Greene being a favorite in our household for years and would trust him with everything.  Recently I broke my elbow and was sent to Dr. Vadasdi.  She was amazing! Great with surgery and aftercare. Very compassionate throughout the whole process! Thank you ONS for getting me through everything! (ED)

Dr. Vadasdi– I was given great information prior to and post surgery. The staff and Dr. Vadasdi were very responsive.  I was very pleased with all aspects of the experience. (Anonymous)

Dr. Vadasdi: It’s been over a year now since my elbow surgery and I’m back in full swing. Literally! My golf swing- I had my best season to date (over 45 rounds) and achieved my lowest handicap score of 10.8. I can’t thank you enough for applying your surgical skills in repairing my elbow. With PT my recovery was smooth and quick. I was back up and running in just a few months. I feel better and stronger than ever. Your staff from start to finish was professional and compassionate. Thank you. (DT)

 

I find Dr. Vadasdi to be a genius and compassionate doctor. Her care of me as her patient was outstanding! (Patient Survey)

I have had shoulder surgery before and Dr. Vadasdi is the best and so is the ONS staff! (Patient Review)

Dr. Vadasdi was wonderful. She performed two surgeries, the first to find out what was wrong with a repair conducted by another surgeon, and a second to then fix the problem. She also thought to collect tissue samples during her first surgery, then finding that I had an infection that required 6 weeks of daily antibiotic infusion. I am now 100% healthy and back to normal routines, including yoga (at age 68!) (comment from RateMD)

Dear Dr. VadasdiI neglected to tell you today how much I appreciated the excellent rebuild of my shoulder.  You are obviously very talented as my recovery demonstrates. I recommend you to everyone! Thanks again for your time, concern, and operating skills. Have a great New Year!  (CS)

 

My experience was fantastic! Dr. Vadasdi was incredible. She did a great job on my shoulder. I strongly recommend that anyone who is facing shoulder surgery to use Dr. Vadasdi.

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