Dr. Louis J. Mariorenzi, M.D. is a board-certified orthopedic surgeon who is fellowship-trained in the treatment of adult arthritis and joint replacement surgery. He obtained his medical degree at Brown University in Providence, RI. After general surgery training at St. Luke’s–Roosevelt Medical Center in New York, NY, he completed an orthopedic residency at Tufts–New England Medical Center in Boston, MA.
Dr. Louis J. Mariorenzi, M.D. is a board-certified orthopedic surgeon who is fellowship-trained in the treatment of adult arthritis and joint replacement surgery. He obtained his medical degree at Brown University in Providence, RI. After general surgery training at St. Luke’s–Roosevelt Medical Center in New York, NY, he completed an orthopedic residency at Tufts–New England Medical Center in Boston, MA.
The reviews listed below were collected independently of University Orthopedics through rater8. Each review represents an authentic and verified patient experience.
Very knowledgeable did a great job extremely helpful and nice
(1 week ago)
Dec-2025
awesome man awesome operation
(1 week ago)
Dec-2025
strait forwad guy
(1 week ago)
Dec-2025
I always enjoy when I be treated by Dr. Louise Marioenzi , he has always made me feel confident , this is my second hip replacement and my experience has been good . His front desk assistant is very polite and is also very helpful. Any questions I’ve had I been very well attended by his staff or the doctor. Soon Louis Marioenzi will be retiring I’m sure he will be missed, thank you for all you have done and blessings ❤️
(2 weeks ago)
Dec-2025
Was informed today he would be retiring. I’m so thankful I had him do my knee replacement before that. He’s an excellent doctor.
(2 weeks ago)
Dec-2025
Excellent surgeon
(3 weeks ago)
Dec-2025
Dr Louis gave me excellent service.
(3 weeks ago)
Dec-2025
Thank you for everything with my sore knees. Happy retirement to you.
(3 weeks ago)
Dec-2025
Great doctor, great surgeon and describes everything in layman’s terms. All the best on your retirement Doc
(3 weeks ago)
Dec-2025
Excellent doctor a great job on my knee and I would recommend him to all my friends
(1 month ago)
Nov-2025
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University Orthopedics - Cranston, RI
725 Reservoir Ave, Suite 101 Cranston, RI 02910
Dr. Louis J. Mariorenzi, M.D. is a board-certified orthopedic surgeon who is fellowship-trained in the treatment of adult arthritis and joint replacement surgery. He obtained his medical degree at Brown University in Providence, RI. After general surgery training at St. Luke’s–Roosevelt Medical Center in New York, NY, he completed an orthopedic residency at Tufts–New England Medical Center in Boston, MA. Following orthopedic residency he sought fellowship training in adult hip and knee arthritis and joint replacement surgery at The Royal London Hospital Medical College in London, UK.
In 1987, Dr. Louis J. Mariorenzi returned home to RI to practice with his father A. Louis Mariorenzi MD and later his brother Michael P. Mariorenzi, MD. Dr. Mariorenzi has held numerous leadership positions on many boards and committees at St. Joseph Hospital-Our Lady of Fatima Hospital and Roger Williams Medical Center. He has been voted “Top Doc” in orthopedic surgery by his peers in Rhode Island Monthly magazine nearly every year since the initial publication in 1994. Away from the medicine, he enjoys hiking, sailing, skiing and mountaineering. He has successively climbed all “Seven Summits” including Mt. Everest.
Very knowledgeable did a great job extremely helpful and nice
awesome man awesome operation
strait forwad guy
I always enjoy when I be treated by Dr. Louise Marioenzi , he has always made me feel confident , this is my second hip replacement and my experience has been good . His front desk assistant is very polite and is also very helpful. Any questions I’ve had I been very well attended by his staff or the doctor. Soon Louis Marioenzi will be retiring I’m sure he will be missed, thank you for all you have done and blessings ❤️
Was informed today he would be retiring. I’m so thankful I had him do my knee replacement before that. He’s an excellent doctor.
Excellent surgeon
Dr Louis gave me excellent service.
Thank you for everything with my sore knees. Happy retirement to you.
Great doctor, great surgeon and describes everything in layman’s terms. All the best on your retirement Doc
Excellent doctor a great job on my knee and I would recommend him to all my friends