John Nicholas Diana, MD
Orthopedic Surgery
Highlights
Age Groups Seen
- Adult 21-65
- Older Adult >65
Languages
- English
Gender
MaleAbout John Nicholas Diana
About The Provider
Board certified orthopedic surgeon, John Diana, MD, is Chief of the Hip Division at the Coon Joint Replacement Institute, specializing in minimally invasive knee and hip replacement surgery.
Dr. Diana has performed approximately 2000 hip replacement surgeries, nearly half of which were performed using the anterior hip replacement approach. He has performed over 2000 knee joint replacement surgeries, is highly regarded for his work in computer-assisted navigation for joint replacement surgery, and is certified as a MAKO™ robotic surgeon for both knee and hip replacements.
Dr. Diana focuses extensively on minimally invasive joint replacement surgery, using the latest state-of-the-art technologies. Using these minimally invasive surgical techniques may reduce pain, restore mobility and promote a quick return to normal activities for patients suffering from osteoarthritis and other conditions.
Dr. Diana graduated Phi Beta Kappa from Indiana University, and earned his medical degree from Indiana University School of Medicine. He completed his internship and residency at Hospital of the University of Pennsylvania, where he was awarded Chief Residency of Orthopedic Surgery. As Chief Resident, Dr. Diana received the DeForest Willard Award, the highest honor that can be bestowed upon a graduate.Dr. Diana is an active member of the American Association of Hip and Knee surgeons.
A devoted family man, Dr. Diana enjoys spending time with his wife, son and daughter. His primary interest, outside of work and time with family, is ultrarunning. Ultrarunning is primarily trail running and involves races over a marathon distance. Dr. Diana was a volunteer physician for the U.S. Olympic Marathon Trials in 2012, and is a member of the USATF. He has also done volunteer medical work in both Guatemala and Kenya, providing medical services and education.
Provider Type
Physician
Locations
- Coon Joint Replacement Institute: Adventist Health St. Helena
- 6 Woodland Road, Suite 202, Saint Helena, CA 94574
- Get Directions
- phone: 707-968-0670
- 3273 Claremont Way, Suite 100, Napa, CA 94558
- Get Directions
- phone: 707-254-7117
Expertise
Education
Indiana University School of Medicine
Medical SchoolHospital of the University of Pennsylvania
Internship ProgramHospital of the University of Pennsylvania
Residency ProgramBoard Certifications
Orthopaedic Surgery
American Board of Orthopaedic Surgery, 2003Insurance
- Adventist Health Employee Health Plan / Incentive Health
- Aetna
- AH Employee/ Incentive Health
- Blue Cross
- Blue Shield
- Cigna
- Coventry
- Galaxy
- Health Net
- Health Smart
- IPA Meritage
- IPA Meritage (Napa County Only)
- IPA Providence
- IPA Providence (Napa County Only)
- Medi-cal ORP1
- Medicare
- Medicare AHSH part B
- Medicare AHPN Part B Overlay
- MultiPlan
- Multiplan1
- Network by Design
- Networks By Design
- Pacific Foundation for Medical Care
- Partnership (Under Hospital TIN)
- Tricare
- Triwest1
- UHC
- Western Growers
Ratings & Reviews
5 out of 5
165 ratings, 26 reviewsThe provider star rating is calculated using patient responses to the five care provider questions in our patient satisfaction survey. Below you can see the provider’s star rating and the number of his or her patients who have provided feedback.
- 5 out of 5 starsReviewed on 9/18/2025
Very impressed by knowledge, transparency and great communication skills!
- 5 out of 5 starsReviewed on 9/10/2025
Dr. Diana was AMAZING! He identified mild hip dysplasia from the xray which he said he could fix while doing replacement surgery. He recommended me for out-patient surgery, and was personable and relatable. He was so positive and upbeat about my recovery!
- 5 out of 5 starsReviewed on 8/14/2025
Dr. Diana was great.
- 5 out of 5 starsReviewed on 7/31/2025
Dr.Diana was very knowledgeable and provided the highest level of care.
- 5 out of 5 starsReviewed on 7/29/2025
I would've liked to walk out with an AVS (After Visit Summary) like most medical visits have now so I'd have a record of who I saw & any recommendations or f/u he suggested.
- 5 out of 5 starsReviewed on 7/28/2025
Everything was explained to me in a way I could understand what the Dr. Was talking about.
- 5 out of 5 starsReviewed on 7/14/2025
They listened carefully, and answered any questions or concerns I had completely.
- 5 out of 5 starsReviewed on 6/26/2025
Dr. Diana is the best.
- 5 out of 5 starsReviewed on 6/25/2025
Dr. Diana did a great job getting as much information as possible regarding my situation
- 5 out of 5 starsReviewed on 6/23/2025
My provider seemed very knowledgeable and able to answer any questions I had
- 5 out of 5 starsReviewed on 6/11/2025
Dr. Diana is a good listener and good at explaining things in clear, understandable language.
- 5 out of 5 starsReviewed on 5/13/2025
Provider confident and competent
- 5 out of 5 starsReviewed on 4/25/2025
Exceptional experience! Good combination of professionalism and an attentive, caring environment. Exceeded expectations in every regard.
- 5 out of 5 starsReviewed on 3/31/2025
Very knowledgeable and gave options.
- 5 out of 5 starsReviewed on 2/24/2025
Dr. Diana answered all my questions. He was professional but also kind. I would certainly recommend him.
- 5 out of 5 starsReviewed on 2/24/2025
Dr. Diana was highly recommended by 5 people who had surgery done by him, and after meeting with him I understand why.
- 5 out of 5 starsReviewed on 2/24/2025
I was reassured that the infection I had was not going to hinder my progress rehabilitating my knee. Dr. Diana was very positive and encouraging about my rehabilitation process. I loved that Dr. Diana shared the X-ray images and answered my questions.
- 5 out of 5 starsReviewed on 2/5/2025
Made me feel comfortable. No rush approach.
- 5 out of 5 starsReviewed on 2/3/2025
Dr Diana was very attentive, knowledgeable and made me feel at ease!
- 5 out of 5 starsReviewed on 12/22/2024
Dr. Diana is very caring, thoughtful and very thorough in explaining options. He's great!
- 5 out of 5 starsReviewed on 11/18/2024
Dr. Diana answered all of my questions and carefully explained the knee replacement surgery to me. We also discussed some other issues and I was very pleased with his answers/explanations.
- 5 out of 5 starsReviewed on 11/18/2024
Excellent communication
- 5 out of 5 starsReviewed on 11/6/2024
Liked Dr. Diana a lot and have recommended him to others
- 5 out of 5 starsReviewed on 11/4/2024
Excellent patient service
- 5 out of 5 starsReviewed on 10/18/2024
I would highly recommend this care provider to anyone looking for good service in the medical field. I am just so glad I found them.
- 5 out of 5 starsReviewed on 10/17/2024
Would recommend this care provider to anyone who would listen.