Doreen Rioux, DO
Family Medicine Physician · Yorba Linda, CA
Doreen Rioux, DO is a family medicine physician with a practice address in Yorba Linda, California, and NPI 1124029020, issued on Aug 2, 2005. Check the license (California 20A5249, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Doreen Rioux
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A5249 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4300 Rose Dr, Yorba Linda, CA 92886
- Phone
- (714) 528-4211
- Enumerated
- Aug 2, 2005
- Record last updated
- Nov 10, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (714) 579-6868
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 4300 Rose Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ai-Vy Bui, DOPediatrics Physician1821557984
Verify Doreen Rioux in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A5249Check 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 family medicine physician in 2024
33 Medicare Part D claims, against an average of 3,544 among the 117,163 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.
Doreen Rioux among 17,133 family medicine physician records in California
Doreen Rioux, DO is one of 17,133 family 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
48 family medicine physician records list a practice address in Yorba Linda
They are 48 of the 748 NPPES records with a practice address in Yorba Linda, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Yorba Linda → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Kenneth Birkenstein, M.D.Yorba Linda, CA 928861093710022
- Gregg Denicola, MDYorba Linda, CA 928861164469912
- Roxann Engle, DOYorba Linda, CA 928861710981303
- Fred Hurst, MDYorba Linda, CA 928861114927720
- Maria Hutchinson, DOYorba Linda, CA 928861558349316
- Ana Ivanova, M.D.Yorba Linda, CA 928861104812833
- Angsumarn Luecha, MDYorba Linda, CA 928861023018009
- Daniel May, M.D.Yorba Linda, CA 928861760423917
Common questions
What is Doreen Rioux, DO's NPI number?
Doreen Rioux, DO's National Provider Identifier (NPI) is 1124029020, issued on Aug 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Doreen Rioux, DO located?
The NPPES record lists a practice address at 4300 Rose Dr, Yorba Linda, CA, 92886. Phone: (714) 528-4211. Providers update this record themselves, so call before visiting.
How can I verify Doreen Rioux, DO's license?
NPPES lists California license number 20A5249, 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 Doreen Rioux, DO prescribe under Medicare Part D?
In 2024, Doreen Rioux, DO had 33 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. 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.