Denise Mary Ros
Physician Assistant · San Mateo, CA
Denise Mary Ros is a physician assistant with a practice address in San Mateo, California, and NPI 1093351751, issued on Nov 18, 2019. Check the license (California 58049, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Denise Mary Ros
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 58049 CA
Self-reported in NPPES; status is on the state search - Practice location
- 50 S San Mateo Dr, San Mateo, CA 94401
- Phone
- (650) 652-8788
- Enumerated
- Nov 18, 2019
- Record last updated
- Jun 3, 2024
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 50 S San Mateo Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Denise Mary Ros in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 58049Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average physician assistant in 2024
28 Medicare Part D claims for 11 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Cephalexin12 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.
Denise Mary Ros among 14,451 physician assistant records in California
Denise Mary Ros 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 2019, is newer than 56% of them.
- NPI issued2019 · 56% of these records are older, 38% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2024 · 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).
Physician Assistant providers in California
There are 14,451 physician assistant records in California.
All 14,451 in California → Every provider in San Mateo → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Caitlin De CastroSan Mateo, CA 944011265219075
- Rebecca ForrestSan Mateo, CA 944011306293048
- Laurel King, PASan Mateo, CA 944011508954132
- Shelby O'HaraSan Mateo, CA 944011427762160
- Samantha Oliveira, PA-C, MS, MPHSan Mateo, CA 944011326449893
- Jose Perez, PHYSICIAN ASSISTANTSan Mateo, CA 944011336294651
- Elizabeth Quadraccia, PASan Mateo, CA 944011811936800
- Matthew Shaw, PA-CSan Mateo, CA 944011730453390
Common questions
What is Denise Mary Ros's NPI number?
Denise Mary Ros's National Provider Identifier (NPI) is 1093351751, issued on Nov 18, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Denise Mary Ros located?
The NPPES record lists a practice address at 50 S San Mateo Dr, San Mateo, CA, 94401. Phone: (650) 652-8788. Providers update this record themselves, so call before visiting.
How can I verify Denise Mary Ros's license?
NPPES lists California license number 58049, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Denise Mary Ros prescribe under Medicare Part D?
In 2024, Denise Mary Ros had 28 Medicare Part D claims for 11 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.