The reviews listed below were collected independently of Princeton Orthopaedic Associates through rater8. Each review represents an authentic and verified patient experience.
Dr. Grenis is just what I need in a specialist. Easy to speak with and explains without talking over my head. Takes his time and is kind (and funny). I’d highly recommend him for any ortho needs (his specialty is hand/wrist).
(4 days ago)
Dec-2025
Dr. Grenis performed Carpel Tunnel surgeries on both my hands. After all the dust settled and the PT was completed, I am very happy with the results. He's now managing my trigger finger, and I'm very hopeful. Even if I need another hand surgery, I'm confident he's the right doctor. My Mother-in Law is a nurse at a local surgical center in Princeton, and she says he's the absolute best hand doctor around. So, A++ rating from this guy.
(1 week ago)
Dec-2025
Very friendly experience with staff and doctor.
(1 week ago)
Dec-2025
Always such a pleasure.
(1 week ago)
Dec-2025
He was efficient and gave me details about everything he was doing.
(2 weeks ago)
Dec-2025
Great personality and professionalism
(2 weeks ago)
Dec-2025
Dr Grenis took as much time as I needed to completely understand my symptoms, diagnosis and treatment options. I have complete trust in his professional recommendations and management of my carpal tunnel problem.
(2 weeks ago)
Dec-2025
Outstanding doctor
(3 weeks ago)
Nov-2025
Explained clearly and answered my questions.
(3 weeks ago)
Nov-2025
Knowledgeable, professional and has an uncanny ability to explain things in layman’s terms. What a great experience.
Dr. Michael Grenis is a board-certified orthopedic surgeon with a subspecialty interest in hand surgery and the treatment of orthopedic trauma.
Born and raised in Newburgh, N.Y., Dr. Grenis received his undergraduate education at Cornell University where he majored in biochemistry. He earned an M.D. degree at New York Medical College where he was elected to Alpha Omega Alpha, the national medical honor society.
After medical school, Dr. Grenis did an internship in surgery, a residency in orthopedic surgery and a fellowship in hand surgery, all at New York University Medical Center and Bellevue Hospital in New York City. His special interest and advanced training in hand surgery encompasses the evaluation and treatment of conditions such as carpal tunnel syndrome, tendonitis, fractures and ligament injuries of the hand and wrist.
Dr. Grenis has been practicing orthopedic and hand surgery in Princeton since 1990. He has hospital privileges at the University Medical Center of Princeton at Plainsboro and Capital Health System.
Dr. Grenis has been named a “Top Doctor” by the Castle-Connolly Guide to Top Doctors in the New York Metro Area.
Dr. Grenis has published papers in national orthopedic review journals and has presented a scientific paper at a national meeting of the American Association for Hand Surgery. He is a member of the American Academy of Orthopaedic Surgeons, the New Jersey Medical Society, and the Orthopaedic Trauma Association.
See other doctors in Princeton Orthopaedic Associates
Dr. Grenis is just what I need in a specialist. Easy to speak with and explains without talking over my head. Takes his time and is kind (and funny). I’d highly recommend him for any ortho needs (his specialty is hand/wrist).
Dr. Grenis performed Carpel Tunnel surgeries on both my hands. After all the dust settled and the PT was completed, I am very happy with the results. He's now managing my trigger finger, and I'm very hopeful. Even if I need another hand surgery, I'm confident he's the right doctor. My Mother-in Law is a nurse at a local surgical center in Princeton, and she says he's the absolute best hand doctor around. So, A++ rating from this guy.
Very friendly experience with staff and doctor.
Always such a pleasure.
He was efficient and gave me details about everything he was doing.
Great personality and professionalism
Dr Grenis took as much time as I needed to completely understand my symptoms, diagnosis and treatment options. I have complete trust in his professional recommendations and management of my carpal tunnel problem.
Outstanding doctor
Explained clearly and answered my questions.
Knowledgeable, professional and has an uncanny ability to explain things in layman’s terms. What a great experience.