Dr. John Nicholas Diana
M.D. | Adult Reconstructive Orthopaedic Surgery | 29+ years Exp
Medicare Enrolled 3273 Claremont Way, Suite 100, Napa
California, 94558-3306
707-254-7117 707-265-6435
Maps & DirectionsDr. John Nicholas Diana is a Napa, California based orthopedic surgeon with 29 years of experience in Adult Reconstructive Orthopaedic Surgery. He completed his graduation from Indiana University School Of Medicine in 1996. He is also affiliated with hospitals like Adventist Health St Helena and Queen Of The Valley Medical Center. He accepts the Medicare-approved amount. Patients will not be billed for any more than the Medicare deductible and coinsurance. Active license number of Dr. John Nicholas Diana is A87859 for Adult Reconstructive Orthopaedic Surgery in California.
Dr. John Nicholas Diana deals with reconstructive procedures such as joint arthroplasty (i.e., hip and knee), osteotomy, arthroscopy, soft-tissue reconstruction, and a variety of other adult reconstructive surgical procedures.
Complete Profile:
Dr. John Nicholas Diana speciality, credentials, practice address, contact phone number and fax are as below.
Patients can directly walk in or can call on the below given phone number for appointment.
| Specialization: | Orthopedic - Adult Reconstructive Orthopaedic Surgery |
| Credentials: | M.D. |
| Experience: | 29+ years |
| Medical School Attended: | Indiana University School Of Medicine |
| Graduation Year: | 1996 |
| Gender: | Male |
| Accepts Medicare Assignment: | Yes |
| Practice Address: | 3273 Claremont Way, Suite 100, Napa,
California, 94558-3306 |
| Phone: | 707-254-7117 |
| Fax: | 707-265-6435 |
Professional Identification Codes:
NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services (CMS).
NPI details are as mentioned below.
| PAC ID: | 2365404373 |
| Enrollment ID: | I20041103000333 |
| NPI Number: | 1649297540 |
| NPI Enumeration Date: | 16 Jul, 2006 |
| NPI Last Update On: | 22 Oct, 2014 |
Medical Licenses:
Doctors can have one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Dr. John Nicholas Diana are as mentioned below.
| License Number | Specialization | State | Status | |
| A87859 | Adult Reconstructive Orthopaedic Surgery | California | Primary | |
| A87859 | Sports Medicine | California | Secondary | |
| A87859 | Orthopaedic Trauma | California | Secondary | |
Hospital Affiliation:
Surgeons are affiliated to many hospitals whom they worked with in the past or are presently working with. One surgeon can be affiliated to four to five hospitals at a time.
| Hospital Name (CCN) | State | Hospital Type |
| Adventist Health St Helena (050013) | Saint helena, CA | Acute Care Hospital |
| Queen Of The Valley Medical Center (050009) | Napa, CA | Acute Care Hospital |
| Adventist Health Clearlake (051317) | Clearlake, CA | Critical Access Hospital |
| Mad River Community Hospital(050028) | Arcata, CA | Acute Care Hospital |
| Sonoma Valley Hospital (050090) | Sonoma, CA | Acute Care Hospital |
Group Practice:
Group practices are practice of medicine by a group of physicians who share their premises and other resources. Following list states all the group name
with which Dr. John Nicholas Diana is associated with along with the number of members in that group.
| Organization Name (Group PAC ID) | Members |
| Adventist Health Physicians Network (3274580972) | 405 |
| Napa Valley Orthopaedic Medical Group Inc (4688636699) | 15 |
| St. Helena Hospital (8729059878) | 33 |
Other Medical Identifiers:
Other legacy medical identifiers associated with Dr. John Nicholas Diana such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
| Identifier | Type | State | Issuer |
| 00A878590 | Medicaid | California | |
| A87859 | Other | California | LICENSE |
Business Mailing Address:
Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned address.
| Address: | 3273 Claremont Way, Suite 100
Napa, California |
| Zip: | 94558-3306 |
| Phone Number: | 707-254-7117 |
| Fax Number: | 707-265-6435 |
Patients can reach Dr. John Nicholas Diana at
3273 Claremont Way, Suite 100, Napa, California or can
call to book an appointment on 707-254-7117.
Comments/ Reviews:
Patients can read all the reviews posted for Dr. John Nicholas Diana below. You may also share your own experience like the quality of treatment, behavior, and overall care provided by Dr. John Nicholas Diana. It will help others make informed decisions.
** Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 08 December, 2025.