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Emergency Medicine Providers in San Mateo, CA

Browse 23 Emergency Medicine providers listed in NPPES with a practice address in San Mateo, California.

23 Healthcare Providers

How San Mateo compares with the U.S.

San Mateo has 22 clinicians in Emergency Medicine per 100,000 residents, close to the U.S. rate of 21.

That is 23 active clinicians in Emergency Medicine with a practice address in San Mateo, for a population of 103,105.

The California rate is 20 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 clinicians in Emergency Medicine in San Mateo listed in the CMS Medicare file (10 of 10) accept Medicare assignment. That is similar to the California share of 97%.

Only 10 of 23 active clinicians in Emergency Medicine 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.

None of the 10 clinicians in Emergency Medicine in San Mateo listed in the CMS Medicare file have a CMS telehealth indicator. Some may still offer telehealth; ask the office.

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).

Emergency Medicine Medicare (PECOS) Enrollment & Ordering Eligibility

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

Source: CMS PECOS
PECOS Enrolled Specialists 16 In San Mateo, CA
Part B Lab & Imaging Eligible 16 Diagnostic Referrals
DME Ordering Eligible 16 Durable Medical Equipment
Home Health Agency Referrals 16 HHA Ordering Eligible
Showing 1โ€“20 of 23 providers
With recent CMS data first, then Aโ€“Z

Dr. Michael Aratow , MD

Emergency Medicine

Active NPI Status
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732222
NPI Identifier 1891804043
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Dr. Yenting Chen , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
100 S San Mateo Dr, San Mateo, CA 944013805
Phone: 6506964427
NPI Identifier 1326250440
View Full Profile

Amy Chuang

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732222
NPI Identifier 1538746995
View Full Profile

Dr. Dwight David Gaggero , MD

Emergency Medicine

Active NPI Status
3460 Glendora Dr, San Mateo, CA 944033943
Phone: 6507592687
NPI Identifier 1366433153
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Dr. James Mukuang Lee , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
100 S San Mateo Dr, San Mateo, CA 944013805
Phone: 6506964427
NPI Identifier 1154470789
View Full Profile

Dr. Edward Harris Lipton , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732671
NPI Identifier 1770789604
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Dr. David Lewis Malmud , MD

Emergency Medicine

Active NPI Status
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732671
NPI Identifier 1619089281
View Full Profile

Dr. Kevin Masek , MD

Emergency Medicine

Active NPI Status
222 W 39th Ave, San Mateo, CA 944034364
Phone: 4027702357
NPI Identifier 1811280563
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Dr. Zara Rachel Mathews , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
222 W 39th Ave, Smmc Emergency Department, San Mateo, CA 944034364
Phone: 6505732671
NPI Identifier 1124300652
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Dr. Vernell Angenette Smith , MD

Emergency Medicine

Active NPI Status
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732671
NPI Identifier 1144320979
View Full Profile

Dr. Elliot Leo Snyder , MD

Emergency Medicine

Active NPI Status
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732671
NPI Identifier 1598960098
View Full Profile

Dr. Dennis Scott Stempler , MD

Emergency Medicine

Active NPI Status
100 S San Mateo Dr, San Mateo, CA 944013805
Phone: 6506964158
NPI Identifier 1518907583
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Dr. Jennifer V. Tom , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
100 S San Mateo Dr, San Mateo, CA 944013805
Phone: 6506964758
NPI Identifier 1376562686
View Full Profile

Dr. Alex Tsai , DO

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732671
NPI Identifier 1114504321
View Full Profile

Dr. Richard Keith Turner , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
100 S San Mateo Dr, San Mateo, CA 944013805
Phone: 6506964158
NPI Identifier 1568485092
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Dr. Kenneth Taikong Yu , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
100 S San Mateo Dr, San Mateo, CA 944013805
Phone: 6506964427
NPI Identifier 1194996108
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Dr. Jessica Mary Zuraw , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
100 S San Mateo Dr, San Mateo, CA 944013805
Phone: 6506965034
NPI Identifier 1255572780
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Dr. Teri Chew , MD

Emergency Medicine

Active NPI Status
222 W 39th Ave, Emergency Dept-San Mateo Medical Center, San Mateo, CA 944034364
Phone: 4152816499
NPI Identifier 1508032905
View Full Profile

Dr. Arthur Freedman , MD

Emergency Medicine

Active NPI Status
100 S San Mateo Dr, San Mateo, CA 944013805
Phone: 6506964758
NPI Identifier 1225146566
View Full Profile

Dr. Lawrence Howard Gettler , MD

Emergency Medicine

Active NPI Status
222 W 39th Ave, San Mateo, CA 944034364
Phone: 6505732222
NPI Identifier 1083719926
View Full Profile

Frequently Asked Questions about Emergency Medicine in San Mateo

How do I check a Emergency Medicine 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.