More about Dr. John Diana

Dr. John Diana is a leading provider of specialized hip and knee replacement in the Bay Area. Dr. Diana has been in clinical practice since 2001. He dedicates his practice exclusively to hip and knee replacement surgery in order to take the time to provide his patients with a more customized approach and use technologically advanced methods to help achieve successful outcomes from these particular surgeries.

For knee replacement surgery, Dr Diana performs/utilizes:

  1. Robotically-assisted total knee replacement
  2. Robotically-assisted partial knee replacement
  3. Kinomatic custom surgical planning
  4. Quadriceps-sparing surgical techniques
  5. Revision knee replacement


Dr. Diana has been utilizing robotic technology for knee replacement surgery since 2013. Likewise, he has been employing rapid recovery knee replacement concepts for more than a decade. Utilizing greater regional pain control, less-invasive surgical techniques, and current technologies for a more customized surgery, the majority of knee replacements can be safely performed as an outpatient rather than spending multiple days in a hospital setting. Taken together, this allows patients the opportunity to complete their recovery in a shorter time than traditionally expected.

For hip replacement surgery, Dr Diana performs/utilizes:

  1. Direct Anterior Approach (DAA) hip replacement
  2. Kinomatic custom surgical planning
  3. Posterior and lateral approach hip replacement
  4. Revision hip replacement


Dr. Diana is an avid proponent of Direct Anterior Approach Hip Replacement. Since 2009, Dr Diana has performed hip replacement almost exclusively through an anterior approach. Dr. Diana has performed more than 2500 of these procedures. The non-profit organization ProPublica has recognized Dr Diana for his high quality and exceedingly low complication rate for hip replacement in the region.



The combination of more customized planning, less-invasive surgical techniques, and rapid recovery processes allows Dr. Diana to perform the majority of his hip replacement surgeries as an outpatient rather than spending multiple days in a hospital setting. Dr. Diana is the Medical Director of Valley Surgical Suites, LLC and is the Director of Joint Replacement at St Helena Hospital where the hip replacement program has been awarded 5 stars by Healthgrades.

  • The American Academy of Hip and Knee Surgeons (AAHKS)
  • The American Academy of Orthopaedic Surgeons (AAOS)
  • The Napa and Solano County Medical Society
  • California Orthopaedic Association (COA)
  • California Medical Association (CMA)


He enjoys traveling and has performed volunteer medical services in both Guatemala and Kenya. Dr. Diana also enjoys spending time with family and long distance running, having completed both Western States 100 mile Endurance Run and the Leadville Trail 100 Run.

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