Robert Alan Bessler, P.A.
Physician Assistant · Riverside, CA
Robert Alan Bessler, P.A. is a physician assistant with a practice address in Riverside, California, and NPI 1609803907, issued on Jun 26, 2006. Check the license (California PA12853, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Robert Alan Bessler
- Credential
- P.A.
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA12853 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3865 Jackson St, Riverside, CA 92503
- Phone
- (951) 352-5666
- Enumerated
- Jun 26, 2006
- Record last updated
- Jun 12, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (951) 352-5445
- Medicaid ID
- PA12853 CA
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 3865 Jackson St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John AbedEmergency Medicine Physician1891724316
- Betsy Albrecht, R.N. CNOR RNFARegistered Nurse First Assistant1043643208
- Alyssa Armstrong, CNMAdvanced Practice Midwife1770359754
- Marium AwadPharmacist1215641709
- Christine Ayad, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1316458896
- Bassam BaderHospitalist Physician1487072559
Verify Robert Alan Bessler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA12853Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% fewer Medicare Part D claims than the average physician assistant in 2024
423 Medicare Part D claims for 244 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 85 claims were for opioids.
Most prescribed
- Tramadol Hcl55 claims
- Cephalexin41 claims
- Naproxen41 claims
- Hydrocodone-Acetaminophen29 claims
- Amoxicillin-Clavulanate Potass24 claims
- Famotidine16 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.
Robert Alan Bessler among 14,451 physician assistant records in California
Robert Alan Bessler, P.A. 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 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 87% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2008 · 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).
164 physician assistant records list a practice address in Riverside
They are 164 of the 13,893 NPPES records with a practice address in Riverside, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Riverside → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Annette Conrad, MPA, MPTRiverside, CA 925031689780843
- Eleazar Dial, PA-CRiverside, CA 925031679927834
- Michelle Garcia, PA-CRiverside, CA 925031952396392
- Kenneth Granados, PARiverside, CA 925031225486251
- Alicia Iglesias, MS, PA-CRiverside, CA 925031225369333
- Lissette Lopez, PA-CRiverside, CA 925031003157041
- Naomie Novelo, PA-CRiverside, CA 925031306847728
- Jaime Perez, PA-CRiverside, CA 925031629373030
Common questions
What is Robert Alan Bessler, P.A.'s NPI number?
Robert Alan Bessler, P.A.'s National Provider Identifier (NPI) is 1609803907, issued on Jun 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Alan Bessler, P.A. located?
The NPPES record lists a practice address at 3865 Jackson St, Riverside, CA, 92503. Phone: (951) 352-5666. Providers update this record themselves, so call before visiting.
How can I verify Robert Alan Bessler, P.A.'s license?
NPPES lists California license number PA12853, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Robert Alan Bessler, P.A. prescribe under Medicare Part D?
In 2024, Robert Alan Bessler, P.A. had 423 Medicare Part D claims for 244 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.