John J. Mercuri, MD, MA · Orthopaedic Surgeon · Scranton, PA
Hip and knee replacement, done with the most advanced tools available.
Dr. Mercuri replaces worn-out hips and knees. He also teaches other surgeons how to do it. He cares for patients across Northeastern Pennsylvania at Geisinger.

How can Dr. Mercuri help?
My knee hurts
Total, partial, and revision knee replacement. Learn what happens and how Dr. Mercuri does it.
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My hip hurts
Total, revision, and complex hip replacement. Learn what happens and how Dr. Mercuri does it.
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Is it time for a replacement?
There is no single test for this. Here is how Dr. Mercuri thinks about who is ready for surgery.
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Is it time for a replacement?
The decision to have a joint replacement is one that you will make together with your surgeon, your other physicians, and your family. There are several reasons why you might be a candidate for orthopaedic surgery. Generally, patients who benefit the most from surgery are suffering from severe pain that limits their normal everyday activities. This pain is resistant to non-operative treatments such as medications, injections and therapy. There are no absolute indications or restrictions for surgery. Orthopaedic surgeons evaluate each patient individually, and recommendations are based on your specific case. Most patients are between the ages of 50 to 80, but joint replacements have been performed successfully in patients of all ages.
How to see Dr. MercuriCredentials
- Fellowship Trained
- Insall Scott Kelly Institute, New York
- Quality & Patient Safety Leadership
- Director of Quality, Geisinger Musculoskeletal Institute
- Fellowship Director
- He trains the next generation of joint surgeons
- Advanced Technology
- Robotics, computer navigation, and augmented reality

Meet Dr. Mercuri
Dr. Mercuri has dedicated his practice to Northeastern Pennsylvania, where he was raised. He has earned recognition both nationally and internationally for his expertise in personalized joint replacement and the use of advanced surgical technologies. Dr. Mercuri provides these cutting-edge treatments to each patient, employing subvastus kinematic alignment for knee replacements and ensuring customized implant positioning for hip replacements.
He serves as Director of Quality for the Musculoskeletal Institute, Director of the Geisinger Adult Reconstruction Fellowship, and Associate Professor at Geisinger Commonwealth School of Medicine.
Read his full storyIn patients' own words
These stories were shared by Dr. Mercuri's patients on March 2 a Million, an initiative he joined as one of its first surgeons to help people recover from joint replacement with less pain and fewer opioids. Every patient is different, and results vary.
"Today, just shy of 3 mo post op, I am back to work (home health p/t aide), enjoying 4 mile walks, and can walk up the stairs normally. I am so grateful to Dr. Mercuri and for his use of the Kinematic Alignment for my knee. Recovery was a breeze and life is good!"
Elizabeth · Knee replacement
"I had tried physical therapy, steroid injections, gel injections and a nerve block. Nothing would ease the pain. I followed Dr. Mercuri's instructions and participated in the daily exercises both before and after the procedure. I am now well on my way to having my life back, at 13 days post op I'm resuming all of my usual activities with little to no pain."
Diana · Knee replacement
"I have full range of motion and am able to do so much more than I could before my surgery. I now use the exercise bike which was impossible before, due to horrible pain. I feel Dr. Mercuri and his team were excellent and I am very happy to have had my right knee replaced. By the way, I am 77 years old."
Mary · Knee replacement
"Hours after the surgery, I walked out of the hospital without the aid of a cane or walker. This was my second knee operation, and the recovery was truly amazing. I thought my first knee with robotic surgery was very good, this was truly unbelievable."
Ronald · Knee replacement
"I am grateful and fortunate to have a wonderful surgeon, Dr John Mercuri and his team. They were/are there to address all of my concerns and gave me, and continue to give me the necessary support I need to navigate this process both physically and emotionally."
Ann · Hip replacement
"I can honestly say I experienced NO pain from day 1 of my surgery. Some stiffness/soreness but nothing debilitating. The combination of medications (NO Opiods) made my recovery pain free!"
Susan · Hip replacement
Read the full stories on March2aMillion (opens in a new tab)
How to see Dr. Mercuri
Dr. Mercuri sees patients at Geisinger in Northeastern Pennsylvania. When you call or when your doctor sends a referral, ask for Dr. Mercuri by name.
Find him at Geisinger (opens in a new tab)Referring providers: revision and complex cases welcome.








