About Napa Valley Joint Replacement

Recognized leaders, committed to you.

Experience counts. Technology matters.

Personalized care is essential.

With over 30 years combined experience in advanced hip and knee treatment, Doctors Diana and Caravelli combine their subspecialty expertise with modern minimally invasive techniques and leading technology in conducting more than 400 surgeries per year with proven patient outcomes and longterm results.


Our commitment to providing an individualized treatment plans for each Napa Valley Joint Replacement Center patient is reflected in our practice philosophy:

  1. Assess each patient thoroughly
  2. Develop a personalized treatment plan
  3. Select the highest quality implant based on individual patient needs
  4. Avoid economic conflicts-of-interest that can lead to poor medical decision making
  5. Be attentive to individual patient needs before, during, and after the surgery
  6. Maximize doctor-patient communication throughout treatment

Meet the Surgeon

Dr. John N. Diana, M.D.

Certified MAKO robotic surgeon for knee and hip replacements and Chief of the Hip Division at the Coon Joint Replacement Institute

Dr. Michael Caravelli

Joint Replacement Specialist


"I consider this nothing short of a miracle."

I have always had a very active life style and was growing increasingly frustrated when painful and undependable knees forced me to restrict my activities…

"Having hip surgery may have been one of my best decisions to date"

I was living with everyday hip pain at about level 6 with frequent spikes to 9+ (on scale of 1 to 10.) It was the worst when I went from lying or sitting down, to getting up and moving…

Want to make an appointment?

We are now offering Telemedicine appointments (Virtual Visits). That’s right, you can now see our Orthopaedic Specialists and Pain Management Physician from the comfort of your own home via cell phone, tablet, or computer. You will sit in front of a camera where you will be able to see yourself and your Health Care Provider on the screen once your session begins. Our Telemedicine appointments are HIPPA compliant. Most insurances are now covering Telemedicine.

Phone: (707) 254-7117

Fill out our intake form so we can set up your visit with the correct doctor.