Eric James Gureghian, MD
Internal Medicine Physician · Ontario, CA
Eric James Gureghian, MD is an internal medicine physician with a practice address in Ontario, California, and NPI 1942293006, issued on Aug 24, 2005. Check the license (California A60427, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Eric James Gureghian
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A60427 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3990 Concours, Ontario, CA 91764
- Phone
- (909) 605-8000
- Enumerated
- Aug 24, 2005
- Record last updated
- Jun 29, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (866) 551-0236
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 3990 Concours
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Eric James Gureghian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A60427Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Eric James Gureghian among 17,696 internal medicine physician records in California
Eric James Gureghian, 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 not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2016 · 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).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,696 in California → Every provider in Ontario → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Daniels, MDOntario, CA 917641366516718
- Kishan Thapar, M.D.Ontario, CA 917641881790251
- Yan Zhang, MDOntario, CA 917641346264660
- Mohammed Al-Khayyat, M.D.Montclair, CA 917631588195424
- Lorindha Argudo, MDDiamond Bar, CA 917651750477824
- Steve Chan, MDDiamond Bar, CA 917651790750743
- Edwin Chuong, M.D.Diamond Bar, CA 917651427231802
- Khanh Duong, MDMontclair, CA 917631225528466
Common questions
What is Eric James Gureghian, MD's NPI number?
Eric James Gureghian, MD's National Provider Identifier (NPI) is 1942293006, issued on Aug 24, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Eric James Gureghian, MD located?
The NPPES record lists a practice address at 3990 Concours, Ontario, CA, 91764. Phone: (909) 605-8000. Providers update this record themselves, so call before visiting.
How can I verify Eric James Gureghian, MD's license?
NPPES lists California license number A60427, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.