Brian R. Riding, MS, PA-C
Physician Assistant · Fountain Valley, CA
Brian R. Riding, MS, PA-C is a physician assistant with a practice address in Fountain Valley, California, and NPI 1750663126, issued on Sep 12, 2011. Check the license (California 21812, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Brian R. Riding
- Credential
- MS, PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 21812 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11160 Warner Ave, Fountain Valley, CA 92708
- Phone
- (714) 850-7300
- Enumerated
- Sep 12, 2011
- Record last updated
- Nov 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (714) 850-7310
- Medicare enrollment
- Enrolled (PECOS I20120131000877); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 11160 Warner Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Brian R. Riding in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 21812Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average physician assistant in 2024
183 Medicare Part D claims for 90 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 80 claims were for opioids.
Most prescribed
- Oxycodone Hcl42 claims
- Meloxicam39 claims
- Ondansetron Odt35 claims
- Hydrocodone-Acetaminophen22 claims
- Ibuprofen11 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brian R. Riding among 14,451 physician assistant records in California
Brian R. Riding, MS, PA-C is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 30% of them.
- NPI issued2011 · 30% of these records are older, 67% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2011 · median 2018 among the 7,214 with a school on file
- Record last updated2021 · 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 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
61 physician assistant records list a practice address in Fountain Valley
They are 61 of the 2,190 NPPES records with a practice address in Fountain Valley, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Fountain Valley → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Fidel Andrade, PAFountain Valley, CA 927081578547782
- Jody Carr, PA-CFountain Valley, CA 927081881882264
- Lisa Chan, PA-CFountain Valley, CA 927081831128446
- Mitzi D'Aquila, PA-CFountain Valley, CA 927081093919862
- Susan Font, PA-CFountain Valley, CA 927081689857229
- Shawna Jones, P.A.-CFountain Valley, CA 927081447451786
- Steven Lerner, PAFountain Valley, CA 927081891777462
- Vinh Ngo, PAFountain Valley, CA 927081386796118
Common questions
What is Brian R. Riding, MS, PA-C's NPI number?
Brian R. Riding, MS, PA-C's National Provider Identifier (NPI) is 1750663126, issued on Sep 12, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Brian R. Riding, MS, PA-C located?
The NPPES record lists a practice address at 11160 Warner Ave, Fountain Valley, CA, 92708. Phone: (714) 850-7300. Providers update this record themselves, so call before visiting.
How can I verify Brian R. Riding, MS, PA-C's license?
NPPES lists California license number 21812, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Brian R. Riding, MS, PA-C prescribe under Medicare Part D?
In 2024, Brian R. Riding, MS, PA-C had 183 Medicare Part D claims for 90 beneficiaries; the average among physician assistant prescribers was 830. 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.