Robert Hsu, MPAS, PA-C
Physician Assistant · San Jose, CA
Robert Hsu, MPAS, PA-C is a physician assistant with a practice address in San Jose, California, and NPI 1821168832, issued on Nov 8, 2006. Check the license (California PA 18635, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Robert Hsu
- Credential
- MPAS, PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA 18635 CA
Self-reported in NPPES; status is on the state search - Practice location
- 455 Oconnor Dr, San Jose, CA 95128
- Phone
- (408) 920-0177
- Enumerated
- Nov 8, 2006
- Record last updated
- Jul 15, 2016 (not updated in 10 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Also registered at 455 Oconnor Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maricela Aguaristi, PHYSICIAN ASSISTANTPhysician Assistant1609059062
- Katharine Aldrich, CNMAdvanced Practice Midwife1790806388
- Annie Chern, M.D.Family Medicine Physician1104051507
- Alexandra Duisberg, MDStudent in an Organized Health Care Education/Training Program1255820635
- Michael Henehan, DOFamily Medicine Physician1053497685
- Bruce Huffer, MDOrthopaedic Surgery Physician1376581934
Verify Robert Hsu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA 18635Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average physician assistant in 2024
261 Medicare Part D claims for 53 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 42 claims were for opioids.
Most prescribed
- Clopidogrel49 claims
- Metoprolol Tartrate32 claims
- Hydrocodone-Acetaminophen31 claims
- Atorvastatin Calcium26 claims
- Furosemide26 claims
- Potassium Chloride22 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.
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 221 in San Jose → All 14,451 in California → Every provider in San Jose →
Other physician assistant records in California
- Marcia -Galbraith, PAStockton, CA1407143274
- Danny Abad, PAOrange, CA1477158673
- Lea Dominique Abadies, PATustin, CA1124754254
- Rea Elizabeth Abaniel, P.A.-CSeal Beach, CA1396173621
- Ramina Abbasi, PA-CSignal Hill, CA1093448300
- Ariel Abbott, PA-CStockton, CA1780334342
- Barrie Abbott, PA-CAnza, CA1861602575
- Elizabeth Abbott, PA-CSan Diego, CA1437540762
- Terri Abbott, P.A.La Jolla, CA1811165566
- Angela Abboud, MMS, PA-CSanta Rosa, CA1114399334
Common questions
What is Robert Hsu, MPAS, PA-C's NPI number?
Robert Hsu, MPAS, PA-C's National Provider Identifier (NPI) is 1821168832, issued on Nov 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Hsu, MPAS, PA-C located?
The NPPES record lists a practice address at 455 Oconnor Dr, San Jose, CA, 95128. Phone: (408) 920-0177. Providers update this record themselves, so call before visiting.
How can I verify Robert Hsu, MPAS, PA-C's license?
NPPES lists California license number PA 18635, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Robert Hsu, MPAS, PA-C prescribe under Medicare Part D?
In 2024, Robert Hsu, MPAS, PA-C had 261 Medicare Part D claims for 53 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.