Browse Health
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. John Diana:

View the full profile to get information on:

  1. Qualifications
  2. What's important to you

View full profile

Patient Reviews

Patient comments (1)

The overall average patient rating of Dr. John Diana is Good. Dr. Diana has been reviewed by 13 patients who have provided 1 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 4.5
Promptness 4.4
Courteous Staff 4.8
Accurate Diagnosis 5.0
Bedside Manner 4.7
Spends Time with Me 5.0
Follows Up After Visit 4.8

Specialties & Research

Dr. John Diana, MD is board certified in Orthopaedic Surgery.

  • He has special expertise in 5 areas:
  • Hip Osteoarthritis
  • Hip Surgery (Hip Replacement Arthroplasty)
  • Knee Osteoarthritis
  • Knee Surgery (Knee Replacement Arthroplasty)
  • Osteoarthritis (Hand and Wrist)

Education & Awards

Dr. Diana graduated from Indiana University , Indianapolis.


Dr. Diana has 6 hospital affiliations:

  • Queen of the Valley Hospital 
  • Sutter General Hospital 


  • English

Similar doctors nearby

Dr. Michael Shifflett

Orthopaedic Surgery
33 years experience
Napa, CA

Dr. Brian Freeto

Orthopaedic Surgery
9 years experience
Napa, CA

Dr. Daniel Birkbeck

Orthopaedic Surgery
22 years experience
Napa, CA

Dr. Jason Huffman

Orthopaedic Surgery
13 years experience
Napa, CA

Dr. Richard Welch

Orthopaedic Surgery
Napa, CA

Dr. Adam Freedhand

Orthopaedic Surgery
17 years experience
Napa, CA
Search All Similar Doctors
Additional Information
Dr. John Nicholas Diana MD is a male Orthopaedic Surgeon, has 16 years of experience and practices in Orthopaedic Surgery.
Where does Dr. John N. Diana practice?
Dr. John Diana has 1 office location.
Dr. John Diana practices Orthopaedic Surgery near Napa, CA.
See Napa Orthopedic Surgeons.