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Physician Assistants in San Mateo, CA

Browse 31 Physician Assistant providers listed in NPPES with a practice address in San Mateo, California.

31 Healthcare Providers

How San Mateo compares with the U.S.

San Mateo has 30 Physician Assistants per 100,000 residents, about 62% of the U.S. rate of 49.

That is 31 active Physician Assistants with a practice address in San Mateo, for a population of 103,105.

The California rate is 37 per 100,000 residents.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places.

100% of Physician Assistants in San Mateo listed in the CMS Medicare file (12 of 12) accept Medicare assignment. That is higher than the California share of 92%.

Only 12 of 31 active Physician Assistants in San Mateo appear in the CMS Medicare file, so this share describes that smaller group.

What is Medicare assignment?

A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.

Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.

50% of Physician Assistants in San Mateo listed in the CMS Medicare file (6 of 12) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than the California share of 28%.

About the telehealth indicator

The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Physician Assistant Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Physician Assistant practitioners in San Mateo, CA

Source: CMS PECOS
PECOS Enrolled Specialists 25 In San Mateo, CA
Part B Lab & Imaging Eligible 25 Diagnostic Referrals
DME Ordering Eligible 25 Durable Medical Equipment
Home Health Agency Referrals 25 HHA Ordering Eligible
Showing 1โ€“20 of 31 providers
With recent CMS data first, then Aโ€“Z

Karen R Ben-Nun , PA-C

Physician Assistant

Active NPI Status
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732669
NPI Identifier 1487833679
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Ariane Bosch , PA-C

Physician Assistant

Active NPI Status
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732222
NPI Identifier 1649753427
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Jessica K Chu , PA

Physician Assistant

Active NPI Status
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732222
NPI Identifier 1306257167
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Erin Daniel

Physician Assistant

Active NPI Status
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732222
NPI Identifier 1578034633
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Caitlin De Castro

Physician Assistant

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
50 S San Mateo Dr, San Mateo, CA 944013857
Phone: 6506528500
NPI Identifier 1265219075
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Kevin Ryan Eitel , PA-C

Physician Assistant

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
2950 S Delaware St Ste 150, San Mateo, CA 944032591
Phone: 8886636331
NPI Identifier 1811583263
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Rebecca Forrest

Physician Assistant

Active NPI Status
100 S Ellsworth Ave, Suite 806, San Mateo, CA 944013939
Phone: 6504016060
NPI Identifier 1306293048
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Catherine Valerie Hickey

Physician Assistant

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1900 Ofarrell St Ste 190, San Mateo, CA 944031372
Phone: 6503069490
NPI Identifier 1598232134
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Laurel G King , PA

Physician Assistant

Active NPI Status
100 S Ellsworth Ave, San Mateo, CA 944013939
Phone: 6503805695
NPI Identifier 1508954132
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Shelby Ann O'hara

Physician Assistant

Active NPI Status Accepts Medicare Assignment
100 S San Mateo Dr Ste 424, San Mateo, CA 944013805
Phone: 6502624262
NPI Identifier 1427762160
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Samantha Oliveira , PA-C, MS, MPH

Physician Assistant

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
77 N San Mateo Dr, San Mateo, CA 944012889
Phone: 6503420849
NPI Identifier 1326449893
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Reema Navin Patel , MPA

Physician Assistant

Active NPI Status Accepts Medicare Assignment
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732222
NPI Identifier 1417194085
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Joseph Charles Pelej , PA-C

Physician Assistant

Active NPI Status Accepts Medicare Assignment
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732222
NPI Identifier 1356796239
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Kevin Quach

Physician Assistant

Active NPI Status
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732222
NPI Identifier 1982312229
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Denise Mary Ros

Physician Assistant

Active NPI Status
50 S San Mateo Dr, San Mateo, CA 944013857
Phone: 6506528788
NPI Identifier 1093351751
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Jessica Brittany Sclafani , PA-C

Physician Assistant

Active NPI Status
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732354
NPI Identifier 1912359282
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Matthew Shaw , PA-C

Physician Assistant

Active NPI Status
100 S San Mateo Dr, Ste 400, San Mateo, CA 944013805
Phone: 6506964107
NPI Identifier 1730453390
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Lucius K. Upshaw , PA-C

Physician Assistant

Active NPI Status Accepts Medicare Assignment
50 S San Mateo Dr, Suite 440, San Mateo, CA 944013857
Phone: 6505580504
NPI Identifier 1932350790
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Bo Xu , PA-C

Physician Assistant

Active NPI Status
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732671
NPI Identifier 1497903082
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Stephanie Hwanying Yeh , PA-C

Physician Assistant

Active NPI Status Accepts Medicare Assignment
46 Hillsdale Mall, San Mateo, CA 944033407
Phone: 6507695612
NPI Identifier 1467926477
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Frequently Asked Questions about Physician Assistant in San Mateo

How do I check a Physician Assistant practitioner's license?

Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the California licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.

Why is a practitioner missing from this list?

This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.