Brigid Marie Riordan, NP-C
Primary Care Nurse Practitioner · Norco, CA
Brigid Marie Riordan, NP-C is a primary care nurse practitioner with a practice address in Norco, California, and NPI 1568835833, issued on Nov 8, 2015. Check the license (California 95003364, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Brigid Marie Riordan
- Credential
- NP-C
- Primary taxonomy
- Primary Care Nurse Practitioner 363LP2300X
- License number
- 95003364 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1901 Town And Country Dr, Norco, CA 92860
- Phone
- (951) 737-8141
- Enumerated
- Nov 8, 2015
- Record last updated
- Nov 8, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (951) 817-1759
- Entity
- Type 1 · individual
8 nearest primary care nurse practitioner records → All 1,131 in California → Look up another NPI →
Also registered at 1901 Town And Country Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Honesto Pascual, M.D.Internal Medicine Physician1033211438
Verify Brigid Marie Riordan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95003364Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average primary care nurse practitioner in 2024
3,016 Medicare Part D claims for 255 beneficiaries, against an average of 1,492 among the 5,992 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 145 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium113 claims
- Atorvastatin Calcium104 claims
- Lisinopril104 claims
- Levothyroxine Sodium102 claims
- Hydrocodone-Acetaminophen88 claims
- Omeprazole73 claims
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: $383.59
25 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 4,321 providers of this specialty with any payment received $625.13 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.
Brigid Marie Riordan among 1,131 primary care nurse practitioner records in California
Brigid Marie Riordan, NP-C is one of 1,131 primary care nurse practitioner records with a practice address in California. 63% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 22% of them.
- NPI issued2015 · 22% of these records are older, 73% newer
- In a Medicare fileYes · 63% of these records are
- In the CMS Doctors and Clinicians fileNo · 35% of these records are
- Record last updated2015 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP2300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Primary Care Nurse Practitioner providers in California
There are 1,131 primary care nurse practitioner records in California.
All 1,131 in California → Every provider in Norco → Primary Care Nurse Practitioner nationwide →
The 8 primary care nurse practitioner records with the nearest ZIP codes
- Renanda Stevenson, DNP, FNP-BCNorco, CA 928601366687113
- Cherry Ravalo, AGPCNP-BCOrange, CA 928651073247193
- Katharine TriplettOrange, CA 928651851213763
- Theresa Limlengco, NPOrange, CA 928671013787118
- Natalie Adame, PNPOrange, CA 928681750993622
- Sadie Chichakly, CPNPOrange, CA 928681336680404
- Carol De Guzman, NP-COrange, CA 928681669805214
- Catherine Deguzman, NP FACOrange, CA 928681528076536
Common questions
What is Brigid Marie Riordan, NP-C's NPI number?
Brigid Marie Riordan, NP-C's National Provider Identifier (NPI) is 1568835833, issued on Nov 8, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Brigid Marie Riordan, NP-C located?
The NPPES record lists a practice address at 1901 Town And Country Dr, Norco, CA, 92860. Phone: (951) 737-8141. Providers update this record themselves, so call before visiting.
How can I verify Brigid Marie Riordan, NP-C's license?
NPPES lists California license number 95003364, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Brigid Marie Riordan, NP-C prescribe under Medicare Part D?
In 2024, Brigid Marie Riordan, NP-C had 3,016 Medicare Part D claims for 255 beneficiaries; the average among primary care nurse practitioner prescribers was 1,492. 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.