Benjamin D. Simpson, P.A.
Medical Physician Assistant · Riverdale, CA
Benjamin D. Simpson, P.A. is a medical physician assistant with a practice address in Riverdale, California, and NPI 1013224369, issued on Sep 8, 2010. Check the license (California PA21133, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Benjamin D. Simpson
- Credential
- P.A.
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- PA21133 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3567 W. Mt. Whitney Ave., Riverdale, CA 93656
- Phone
- (559) 867-4416
- Enumerated
- Sep 8, 2010
- Record last updated
- Feb 1, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (559) 867-3010
- Entity
- Type 1 · individual
Also registered at 3567 W. Mt. Whitney Ave.
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Benjamin D. Simpson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA21133Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% fewer Medicare Part D claims than the average medical physician assistant in 2024
1,131 Medicare Part D claims for 272 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 24 claims were for opioids.
Most prescribed
- Atorvastatin Calcium70 claims
- Metformin Hcl62 claims
- Albuterol Sulfate Hfa47 claims
- Lisinopril37 claims
- Prednisone29 claims
- Levothyroxine Sodium27 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: $64.77
3 payments; by number, the most common kind was food and beverage; the largest payer was Dexcom, Inc. The 16,165 providers of this specialty with any payment received $1,055.00 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.
2 medical physician assistant records list a practice address in Riverdale
They are 2 of the 17 NPPES records with a practice address in Riverdale, and 3,376 medical physician assistant records in California.
All 2 in Riverdale → All 3,376 in California → Every provider in Riverdale →
Other medical physician assistant records in California
- Bridget Abajian, PA-CLos Angeles, CA1518677061
- Crispin Abbott, PHYSICIAN ASSISTANTThousand Oaks, CA1063467926
- Abdol Hamid Abdali Hajiabadi, P.A.Santa Ana, CA1285747964
- Jilbert Abnoosian, PALynwood, CA1447300314
- Reema Aboelrish, PA-CFresno, CA1376466144
- Sakina Abowath, P.A.Diamond Bar, CA1326287525
- Selin Abraamyan, PA-CGlendale, CA1144795899
- Antonious Abraham, PA-CCovina, CA1003434275
- Michelle AbrahamSacramento, CA1952875957
- Therese Abraham, P.A.-CGlendale, CA1063726586
Common questions
What is Benjamin D. Simpson, P.A.'s NPI number?
Benjamin D. Simpson, P.A.'s National Provider Identifier (NPI) is 1013224369, issued on Sep 8, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Benjamin D. Simpson, P.A. located?
The NPPES record lists a practice address at 3567 W. Mt. Whitney Ave., Riverdale, CA, 93656. Phone: (559) 867-4416. Providers update this record themselves, so call before visiting.
How can I verify Benjamin D. Simpson, P.A.'s license?
NPPES lists California license number PA21133, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Benjamin D. Simpson, P.A. prescribe under Medicare Part D?
In 2024, Benjamin D. Simpson, P.A. had 1,131 Medicare Part D claims for 272 beneficiaries; the average among medical physician assistant prescribers was 1,148. 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.