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Emergency Medicine Providers in Orange, CA

Browse 179 Emergency Medicine providers listed in NPPES with a practice address in Orange, California.

179 Healthcare Providers

How Orange compares with the U.S.

Orange has 129 clinicians in Emergency Medicine per 100,000 residents, 6.1 times the U.S. rate of 21.

That is 179 active clinicians in Emergency Medicine with a practice address in Orange, for a population of 138,266.

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. Cities with hospitals or large medical centers often list more specialists than the number of residents alone would suggest, because patients also come from nearby areas.

84% of clinicians in Emergency Medicine in Orange listed in the CMS Medicare file (108 of 128) accept Medicare assignment. That is lower than the California share of 97%.

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.

1% of clinicians in Emergency Medicine in Orange listed in the CMS Medicare file (1 of 128) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is similar to the California share of 5%.

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 Orange, CA

Source: CMS PECOS
PECOS Enrolled Specialists 166 In Orange, CA
Part B Lab & Imaging Eligible 167 Diagnostic Referrals
DME Ordering Eligible 168 Durable Medical Equipment
Home Health Agency Referrals 167 HHA Ordering Eligible
Showing 1โ€“20 of 179 providers
With recent CMS data first, then Aโ€“Z

Dr. Matthew Abrishamian , MD

Emergency Medicine

Active NPI Status
1100 W Stewart Dr, Orange, CA 928683891
Phone: 7147718000
NPI Identifier 1720516743
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Abner Gabriel Aleman Reyes

Emergency Medicine

Active NPI Status
101 The City Dr S, Orange, CA 928683201
Phone: 7144568888
NPI Identifier 1346874260
View Full Profile

Roy Almog

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
101 The City Dr S, Orange, CA 928683201
Phone: 7144565239
NPI Identifier 1164006946
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Dr. Omar Medhat Amr , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
101 The City Dr S, Building 200 Suite 710 Rt 128-01, Orange, CA 928683201
Phone: 7144565922
NPI Identifier 1770767139
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Dr. Justin Philip Anderson , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
1310 W Stewart Dr Ste 212, Orange, CA 928683837
Phone: 7145438911
NPI Identifier 1659534121
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Dr. Daniel Jose Artiga , MD

Emergency Medicine

Active NPI Status
101 The City Dr S, Orange, CA 928683201
Phone: 7144566786
NPI Identifier 1801537964
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Dr. Samer A Assaf , MD

Emergency Medicine

Active NPI Status
101 The City Dr S, Orange, CA 928683201
Phone: 7144565705
NPI Identifier 1659785970
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Dr. Dean D Aubin , MD

Emergency Medicine

Active NPI Status
2601 E Chapman Ave, Orange, CA 928693206
Phone: 5048978250
NPI Identifier 1932391869
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Dr. Tyler Espiritu Ayalin , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
1010 W La Veta Ave, Suite 755, Orange, CA 928684300
Phone: 7145438911
NPI Identifier 1124274915
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Dr. Austin Michael Badeau , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
200 S Manchester Ave Ste 650, Orange, CA 928683224
Phone: 7144565253
NPI Identifier 1972922342
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Dr. Amy Louise Briggs , MD

Emergency Medicine

Active NPI Status
101 The City Dr S, Orange, CA 928683201
Phone: 7148807812
NPI Identifier 1528422136
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Dr. Douglas Brosnan , MD, JD

Emergency Medicine

Active NPI Status
101 The City Dr S, Uc Irvine Medical Center; Emergency Medicine Department, Orange, CA 928683201
Phone: 7144565239
NPI Identifier 1568642460
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Dr. Michael J Burns , MD

Emergency Medicine

Active NPI Status
Uci Medical Center, 101 The City Drive South, Orange, CA 92868
Phone: 7144562986
NPI Identifier 1568542918
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Dr. Bharath Chakravarthy , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
101 The City Dr S, Orange, CA 928683201
Phone: 7144568068
NPI Identifier 1144259839
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Dr. Chuck Chan , DO

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
101 The City Dr S, Orange, CA 928683201
Phone: 7144568888
NPI Identifier 1841877222
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Dr. Carrie E. Chandwani , MD

Emergency Medicine

Active NPI Status
101 The City Dr S, Room 1a, Emergency Department, Orange, CA 928683201
Phone: 7144565705
NPI Identifier 1568675064
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Dr. Daniel Sung Choi , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
101 The City Dr S, Orange, CA 928683201
Phone: 7144568888
NPI Identifier 1568982965
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Dr. Heesun Choi , DO

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
101 The City Dr S, Orange, CA 928683201
Phone: 7148807812
NPI Identifier 1396137337
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Dr. Victor Manuel Cisneros , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
101 The City Dr S, Rte. 128-01, Orange, CA 928683201
Phone: 7144565239
NPI Identifier 1942732409
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Dr. Brian M Coombe , DO

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
2601 E Chapman Ave, Orange, CA 928693206
Phone: 7146333962
NPI Identifier 1023257755
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Frequently Asked Questions about Emergency Medicine in Orange

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.