Dr John Nicholas Diana, MD - Medicare Orthopedic Surgery in Napa, CA

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Dr John Nicholas Diana, MD is a medicare enrolled "Orthopaedic Surgery - Adult Reconstructive Orthopaedic Surgery" physician in Napa, California. He went to Indiana University School Of Medicine and graduated in 1996 and has 28 years of diverse experience with area of expertise as Orthopedic Surgery. He is a member of the group practice Napa Valley Orthopaedic Medical Group Inc, St. Helena Hospital and his current practice location is 3273 Claremont Way, Suite 100, Napa, California. You can reach out to his office (for appointments etc.) via phone at (707) 254-7117.

Dr John Nicholas Diana is licensed to practice in California (license number A87859) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1649297540.

Contact Information

Dr John Nicholas Diana, MD
3273 Claremont Way, Suite 100,
Napa, CA 94558-3306
(707) 254-7117
(707) 265-6435

Map and Direction




Physician's Profile

Full NameDr John Nicholas Diana
GenderMale
SpecialityOrthopedic Surgery
Experience28 Years
Location3273 Claremont Way, Napa, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr John Nicholas Diana attended and graduated from Indiana University School Of Medicine in 1996
  NPI Data:
  • NPI Number: 1649297540
  • Provider Enumeration Date: 07/16/2006
  • Last Update Date: 10/22/2014
  Medicare PECOS Information:
  • PECOS PAC ID: 2365404373
  • Enrollment ID: I20041103000333

Medical Identifiers

Medical identifiers for Dr John Nicholas Diana such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1649297540NPI-NPPES
00A878590MedicaidCA
A87859OtherCALICENSE

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207XS0114XOrthopaedic Surgery - Adult Reconstructive Orthopaedic Surgery A87859 (California)Primary
207XX0005XOrthopaedic Surgery - Sports Medicine A87859 (California)Secondary
207XX0801XOrthopaedic Surgery - Orthopaedic Trauma A87859 (California)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Adventist Health St HelenaSaint helena, CAHospital
Queen Of The Valley Medical CenterNapa, CAHospital
Sonoma Valley HospitalSonoma, CAHospital
Mad River Community HospitalArcata, CAHospital
Adventist Health ClearlakeClearlake, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Napa Valley Orthopaedic Medical Group Inc468863669916
St. Helena Hospital872905987874

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr John Nicholas Diana allows following entities to bill medicare on his behalf.
Entity NameAdventist Health St. Helena Ob/gyn
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1932176146
PECOS PAC ID: 9234038209
Enrollment ID: O20040108000320
Entity NameSt. Helena Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1720078082
PECOS PAC ID: 8729059878
Enrollment ID: O20040803001176
Entity NameNapa Valley Orthopaedic Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1710934575
PECOS PAC ID: 4688636699
Enrollment ID: O20041102000437
Entity NameAdventist Health Physicians Network
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1063718583
PECOS PAC ID: 3274580972
Enrollment ID: O20050407000633

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr John Nicholas Diana is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr John Nicholas Diana, MD
3273 Claremont Way, Suite 100,
Napa, CA 94558-3306

Ph: (707) 254-7117		Dr John Nicholas Diana, MD
3273 Claremont Way, Suite 100,
Napa, CA 94558-3306

Ph: (707) 254-7117

Reviews and Comments


Orthopaedic Surgery Doctors in Napa, CA

Joseph Wesley Mccoy Jr., M.D.
Orthopedic Surgery
Medicare: Not Enrolled in Medicare
Practice Location: 1100 Trancas St, Suite 211, Napa, CA 94558
Phone: 707-255-4113    Fax: 707-252-8452
Dr. Jason T Huffman, M.D.
Orthopedic Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 3273 Claremont Way, Suite 100, Napa, CA 94558
Phone: 707-254-7117    Fax: 707-265-6435
Dr. Daniel P Birkbeck, MD
Orthopedic Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 3273 Claremont Way, Suite 100, Napa, CA 94558
Phone: 707-254-7117    Fax: 707-265-6435
Richard B. Welch, MD
Orthopedic Surgery
Medicare: Not Enrolled in Medicare
Practice Location: 3285 Claremont Way, Napa, CA 94558
Phone: 707-258-2500    
Dr. Michael Louis Caravelli, M.D.
Orthopedic Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 3273 Claremont Way Ste 100, Napa, CA 94558
Phone: 707-254-7117    Fax: 707-265-6435
Jacqueline Kim Nguyen, MD
Orthopedic Surgery
Medicare: Medicare Enrolled
Practice Location: 3273 Claremont Way Ste 100, Napa, CA 94558
Phone: 707-254-7117    Fax: 707-265-6435

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.