Robert Chapa, P.A.
Physician Assistant · San Jose, CA
Robert Chapa, P.A. is a physician assistant with a practice address in San Jose, California, and NPI 1003945486, issued on Mar 3, 2007. Check the license (California PA18689, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Robert Chapa
- Credential
- P.A.
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA18689 CA
Self-reported in NPPES; status is on the state search - Practice location
- 751 S Bascom Ave, San Jose, CA 95128
- Phone
- (408) 885-6912
- Enumerated
- Mar 3, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 751 S Bascom Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Robert Chapa in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA18689Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average physician assistant in 2024
197 Medicare Part D claims for 37 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 23 claims were for opioids.
Most prescribed
- Clopidogrel25 claims
- Oxycodone Hcl22 claims
- Gabapentin14 claims
- Metoprolol Tartrate14 claims
- Atorvastatin Calcium12 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: $1,504.91
7 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 64,719 providers of this specialty with any payment received $841.65 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.
Robert Chapa among 14,451 physician assistant records in California
Robert Chapa, 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 2007, is newer than 13% of them.
- NPI issued2007 · 13% of these records are older, 78% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2007 · 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).
221 physician assistant records list a practice address in San Jose
They are 221 of the 20,925 NPPES records with a practice address in San Jose, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in San Jose → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Maricela Aguaristi, PHYSICIAN ASSISTANTSan Jose, CA 951281609059062
- Sheenkai Ameer, PACSan Jose, CA 951281669692778
- Nicole Bendemire, MPA, PA-CSan Jose, CA 951281366619546
- Deanna Davis, PASan Jose, CA 951281346219631
- Dax Grice, PA-CSan Jose, CA 951281174703490
- Robert Hsu, MPAS, PA-CSan Jose, CA 951281821168832
- Julie Jung, PASan Jose, CA 951281346303484
- Randy Maestretti, PA-CSan Jose, CA 951281982874079
Common questions
What is Robert Chapa, P.A.'s NPI number?
Robert Chapa, P.A.'s National Provider Identifier (NPI) is 1003945486, issued on Mar 3, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Robert Chapa, P.A. located?
The NPPES record lists a practice address at 751 S Bascom Ave, San Jose, CA, 95128. Phone: (408) 885-6912. Providers update this record themselves, so call before visiting.
How can I verify Robert Chapa, P.A.'s license?
NPPES lists California license number PA18689, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Robert Chapa, P.A. prescribe under Medicare Part D?
In 2024, Robert Chapa, P.A. had 197 Medicare Part D claims for 37 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.