Gregory P. Ouligian, MD
Emergency Medicine Physician · Roseville, CA
Gregory P. Ouligian, MD is an emergency medicine physician with a practice address in Roseville, California, and NPI 1164538906, issued on Aug 22, 2006. Check the license (California G45329, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory P. Ouligian
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- G45329 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Medical Plaza Dr, Roseville, CA 95661
- Phone
- (916) 781-1000
- Enumerated
- Aug 22, 2006
- Record last updated
- Nov 7, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicaid ID
- 00G453290 CA
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1 Medical Plaza Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ikram Al-Doori, MDHospitalist Physician1801477906
Verify Gregory P. Ouligian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G45329Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average emergency medicine physician in 2024
22 Medicare Part D claims, against an average of 226 among the 54,106 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.
Gregory P. Ouligian among 7,751 emergency medicine physician records in California
Gregory P. Ouligian, MD is one of 7,751 emergency medicine physician records with a practice address in California. 81% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2011 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
54 emergency medicine physician records list a practice address in Roseville
They are 54 of the 5,340 NPPES records with a practice address in Roseville, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Roseville → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Angela Bell, M.D.Roseville, CA 956611578560389
- Mark Biittner, M.D.Roseville, CA 956611932120235
- Dana Dunlavey, M.DRoseville, CA 956611265454037
- Darilyn Falck, M.D.Roseville, CA 956611275644643
- Keith Fenderson, M.DRoseville, CA 956611902824873
- Dawn Hitchcock, M.DRoseville, CA 956611720006604
- Jon Johnston, D.ORoseville, CA 956611629090220
- Christopher Markus, D.ORoseville, CA 956611891717427
Common questions
What is Gregory P. Ouligian, MD's NPI number?
Gregory P. Ouligian, MD's National Provider Identifier (NPI) is 1164538906, issued on Aug 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory P. Ouligian, MD located?
The NPPES record lists a practice address at 1 Medical Plaza Dr, Roseville, CA, 95661. Phone: (916) 781-1000. Providers update this record themselves, so call before visiting.
How can I verify Gregory P. Ouligian, MD's license?
NPPES lists California license number G45329, 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 Gregory P. Ouligian, MD prescribe under Medicare Part D?
In 2024, Gregory P. Ouligian, MD had 22 Medicare Part D claims; the average among emergency medicine physician prescribers was 226. 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.