James F. Roy, MD
Internal Medicine Physician · Corona, CA
James F. Roy, MD is an internal medicine physician with a practice address in Corona, California, and NPI 1063511822, issued on Sep 21, 2006. Check the license (California G35406, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James F. Roy
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G35406 CA
Self-reported in NPPES; status is on the state search - Practice location
- 341 Magnolia Avenue, Corona, CA 92879
- Phone
- (951) 734-9930
- Enumerated
- Sep 21, 2006
- Record last updated
- Oct 28, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (951) 734-9692
- Medicaid ID
- 00G354060 CA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 341 Magnolia Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Kalkanis, MDOtolaryngology Physician1417039637
- Jennie Le, M.D.Pediatrics Physician1780002311
- Michael Molinari, MDInternal Medicine Physician1154420917
- Edward Politoske, MDInternal Medicine Physician1770682536
Verify James F. Roy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G35406Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
22 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $27.58
1 payment: food and beverage; the largest payer was Axsome Therapeutics, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
James F. Roy among 17,696 internal medicine physician records in California
James F. Roy, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2009 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
52 internal medicine physician records list a practice address in Corona
They are 52 of the 3,731 NPPES records with a practice address in Corona, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Corona → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- George Chidi, M.D.Corona, CA 928791396168944
- Jack Cochran, MDCorona, CA 928791700974938
- Christine Duong, MDCorona, CA 928791649299702
- Michael Lam, M.D.Corona, CA 928791033122601
- Mohammad Mahmud, MD, MPH, PHDCorona, CA 928791164513784
- Michael Molinari, MDCorona, CA 928791154420917
- Huong Nguyen, M.D.Corona, CA 928791992199343
- Laura Nieves, MDCorona, CA 928791073808994
Common questions
What is James F. Roy, MD's NPI number?
James F. Roy, MD's National Provider Identifier (NPI) is 1063511822, issued on Sep 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James F. Roy, MD located?
The NPPES record lists a practice address at 341 Magnolia Avenue, Corona, CA, 92879. Phone: (951) 734-9930. Providers update this record themselves, so call before visiting.
How can I verify James F. Roy, MD's license?
NPPES lists California license number G35406, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James F. Roy, MD prescribe under Medicare Part D?
In 2024, James F. Roy, MD had 22 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.