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John Mariani, D.O.
Verified Patient Rating: 4.92 (38 patient reviews and ratings)

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Joint Replacement & Revision, Knee, Trauma

Board-certified Dr. John Mariani focuses his practice on patients with knee pain and innovative techniques for knee replacement surgeries. Dr. Mariani served as chief of staff for Kennedy Memorial Hospitals. Having served as its director of orthopedics at Kennedy Health System as well, Dr. Mariani was instrumental in the growth of the orthopedic program at the institution. He has been involved with several advances in orthopedic care and is currently an industry consultant for Stryker Orthopedics. He has been named to the Courier Post’s “Best of South Jersey” list and was most recently named on the Top Physicians list by South Jersey Magazine in 2013. 

Dr. Mariani is available to see patients at our office in Sewell.

Education & Training

  • Bachelor of Arts: La Salle University, Philadelphia, PA
  • Doctor of Osteopathic Medicine: Philadelphia College of Osteopathic Medicine, Philadelphia, PA
  • Internship: Philadelphia College of Osteopathic Medicine, Philadelphia, PA
  • Orthopedic Surgery Residency: University of Medicine and Dentistry of New Jersey, Stratford, NJ


  • Board Certification: American Osteopathic Board of Orthopedic Surgery

Professional Affiliations

  • Member: American Osteopathic Association
  • Diplomat: American Osteopathic Board of Orthopedic Surgery
  • Alumni Member: Association of Philadelphia College of Osteopathic Medicine
“As a relatively young man (53 at the time), I faced a difficult decision of choosing total knee replacement versus reconstructive surgery. Dr. Mariani was very thorough in explaining all the elements that should be taken into consideration and evaluated from my specific perspective. In the end, the conclusion was for total knee replacement, and I could not be happier with my decision. I am pain-free and only experience some occasional stiffness which can generally get attributed to either overuse or lack of use. The key here is that I am capable of actually "using" my knee where before I didn't have normal function. Rehab exercises are now part of my regular exercise routine, as they should be, and I look forward to a lifetime of normal activities. For the golfing reader, I play right-handed, and it is my right knee. I have no issues playing and have long since abandoned using a brace of any kind, and it's been eight months since the surgery.”
– Jon H.
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