John Diana, MD


Dr. John Diana is one of the top joint replacement surgeons in the Bay area. His practice specializes in hip and knee replacement surgeries, where Dr. Diana has performed over 2500 hip replacement procedures and over 4000 knee replacement procedures. He also teaches both anterior hip replacement techniques and MAKO robotic knee replacement procedures to surgeons throughout the country and Asia.

“Dr. Diana’s professional expertise will be a highly valued resource in helping shape and oversee Napa Medical Research Foundation’s research projects,” said Michael Jackson, founder and chairman of the NMRF board. “We are delighted to welcome him to the Board, and very much appreciate his willingness to donate his time and insights to support the Foundation’s mission of pioneering new minimally invasive orthopedic procedures”.

Dr. Diana has been recognized for high quality and an exceedingly low adjusted complication rate for hip replacement in the region by the non-profit organization ProPublica. He is also listed as a “Top Doc” for 2018 in Sonoma Magazine.

“I am grateful to have the opportunity to support the foundation’s current and future research projects that can lead to new sources of effective treatment for our patients,” said Dr. John Diana. “I look forward to helping Dr. Bodor and his team effectively complete these exciting projects.”

Dr. Diana is also an active member of:

  • The American Academy of Hip and Knee Surgeons (AAHKS)

  • The American Academy of Orthopaedic Surgeons (AAOS)

  • The Napa and Solano County Medical Society

  • The USA Track and Field (USATF)

  • Non-profit research for the Western States Endurance Run (Director)


Dr. Diana enjoys spending time with his family and travelling, as he has performed volunteer medical services in both Guatemala and Kenya. He also enjoys participating in long distance running and has completed both the Western States 100-mile endurance run, the San Diego 100-mile endurance run, and both the CCC and TDS UTMB ultra-marathon races in Chamonix, France. He has also completed the Napa Valley Marathon, the California International Marathon, and the Chicago Marathon on more than one occasion.