Summary

Dr. John Diana treats osteoarthritis, knee osteoarthritis, and hip osteoarthritis, and performs knee surgery for patients in Napa, California. He practices orthopedic surgery and is affiliated with Queen Of The Valley Medical Center. Dr. Diana earned his medical degree from Indiana University School of Medicine and completed his residency at Hospital of the University of Pennsylvania. He speaks English and Spanish. Patients on Vitals rate Dr. Diana 4.1 out of 5.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4
  • 30 years of experience
  • speaks English, Spanish
  • Hospital Of The University Of Pennsylvania
  • 7 written reviews
  • 1 specialty
  • 5 areas of expertise
  • 1 hospital affiliation
  • 3 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. John Nicholas Diana has 3 locations

Napa Valley Orthopaedic Medical Group Inc

3273 Claremont Way Ste 100Napa, CA 94558
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Valley Surgical Suites

3365 Solano AveNapa, CA 94558
Mon6:00 am - 6:00 pm
Tue6:00 am - 6:00 pm
Wed6:00 am - 6:00 pm
Thu6:00 am - 6:00 pm
Fri6:00 am - 6:00 pm
SatClosed
SunClosed

Compare with Similar Doctors

Dr. John Nicholas Diana JR., MD
Neil Pathare, MD
Jay Parkin, MD
Andrew Brooks, MD
Dr. John Nicholas Diana JR., MDNeil Pathare, MDJay Parkin, MDAndrew Brooks, MD
Orthopedic SurgeryOrthopedic SurgeryOrthopedic SurgeryOrthopedic Surgery
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4 
5 
2.2 
4.7 
30 Years of Experience 20 Years of Experience 38 Years of Experience 37 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English, Spanish Speaks Chinese, English, Spanish Speaks English, Spanish Speaks English
Napa , CAFairfield , CAFairfield , CAVacaville , CA
Med School: Indiana University School Of Medicine Med School: Tufts University School Of Medicine Med School: Stanford University School Of Medicine Med School: University Of Oklahoma College Of Medicine
Current Profile
View Profile View Profile View Profile

Insurance Plans Accepted by Dr. John Nicholas Diana

  • Accepts Medicare

Medical Specialties

Dr. John Nicholas Diana has the following specialty

Specialty Expertise

Dr. John Nicholas Diana has the following 5 areas of expertise

  • Hip Osteoarthritis
  • Hip Surgery (Hip Replacement Arthroplasty)
  • Knee Osteoarthritis
  • Knee Surgery (Knee Replacement Arthroplasty)
  • Osteoarthritis (Hand and Wrist)

Certifications, License, & Education

30 Years Experience

Dr. John Nicholas Diana holds an expired medical license in the state of California.

Medical License

Medical Doctor with an expired medical license in the state of California that expired in 2026.

Education & Training

Residency

Completed their residency at Hospital Of The University Of Pennsylvania.

Medical School

Graduated from Indiana University School Of Medicine in 1996.

NPI Number

Dr. Diana's NPI number is 1649297540.

Similar doctors

Frequently Asked Questions

Is Dr. John Diana accepting new patients?
Dr. John Diana is accepting new patients on Vitals. View Dr. John Diana's profile on Vitals to make an appointment.
Does Dr. John Diana accept my insurance?
You can see the insurance plans that Dr. John Diana accepts on their Vitals profile.
Which hospitals is Dr. John Diana affiliated with?
Dr. John Diana is affiliated with Queen Of The Valley Medical Center.
Where is Dr. John Diana's office located?
Dr. John Diana's office is located at 3273 Claremont Way Ste 100, Napa, CA, 94558.
Does Dr. John Diana accept virtual/telehealth appointments?
Dr. John Diana has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards
  • Healthcare system and provider network data

Ensuring Data Transparency and Trust: A Guide to Vitals Doctor Listings and Reviews

Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.

Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.

Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.