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Internal Medicine - Gastroenterology Specialists in Orange, CA

Browse 44 Internal Medicine - Gastroenterology providers listed in NPPES with a practice address in Orange, California.

44 Healthcare Providers

How Orange compares with the U.S.

Orange has 32 clinicians in Internal Medicine - Gastroenterology per 100,000 residents, 5.2 times the U.S. rate of 6.2.

That is 44 active clinicians in Internal Medicine - Gastroenterology with a practice address in Orange, for a population of 138,266.

The California rate is 5.4 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.

97% of clinicians in Internal Medicine - Gastroenterology in Orange listed in the CMS Medicare file (35 of 36) accept Medicare assignment. That is similar to the California share of 96%.

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.

86% of clinicians in Internal Medicine - Gastroenterology in Orange listed in the CMS Medicare file (31 of 36) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than the California share of 61%.

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).

Internal Medicine - Gastroenterology Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine - Gastroenterology practitioners in Orange, CA

Source: CMS PECOS
PECOS Enrolled Specialists 37 In Orange, CA
Part B Lab & Imaging Eligible 37 Diagnostic Referrals
DME Ordering Eligible 37 Durable Medical Equipment
Home Health Agency Referrals 37 HHA Ordering Eligible
Showing 1โ€“20 of 44 providers
With recent CMS data first, then Aโ€“Z

Dr. Alaa Abousaif , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1010 W La Veta Ave, Suite 570, Orange, CA 928684300
Phone: 7148357700
NPI Identifier 1235124108
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Dr. C Gregory Albers , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
Uci Medical Center, 101 The City Drive South, Orange, CA 92868
Phone: 7144568978
NPI Identifier 1982784047
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Dr. Ousama Alkhatib , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1010 W La Veta Ave Ste 570, Orange, CA 928684305
Phone: 7148357700
NPI Identifier 1093283905
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Dr. Shruti Mahindrakar Ariza , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1140 W La Veta Ave, Suite 555, Orange, CA 928684225
Phone: 7148355100
NPI Identifier 1962657023
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Dr. Frances Dang , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
101 The City Dr S Bldg 22c, Orange, CA 928683201
Phone: 8887174463
NPI Identifier 1225892219
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Dr. Anoushka Dua , MD

Internal Medicine - Gastroenterology

Active NPI Status
101 The City Dr S, Orange, CA 928683201
Phone: 7144568888
NPI Identifier 1740817576
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Dr. Robert Ian Maurice Fearn , MBCHB

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
101 The City Dr S, Orange, CA 928683201
Phone: 7144567890
NPI Identifier 1336853126
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Dr. George Holman , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
1010 W La Veta Ave Ste 570, Orange, CA 928684305
Phone: 7148357700
NPI Identifier 1447486436
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Dr. Alexander W. Jahng , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
101 The City Dr S, Orange, CA 928683201
Phone: 7148807812
NPI Identifier 1295927390
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Dr. William E Karnes , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
101 The City Dr S Bldg 22c, Orange, CA 928683201
Phone: 8887174463
NPI Identifier 1881652998
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Dr. Jaehyun Kim , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
101 The City Dr S, Orange, CA 928683201
Phone: 7144568888
NPI Identifier 1508397563
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Joshua Yongbum Kwon

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
101 The City Dr S Bldg 22c, Orange, CA 928683201
Phone: 7144566745
NPI Identifier 1053870121
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David P Lee , MDMPH

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
101 The City Dr S, City Tower, Suite 400, Zot 4092, Orange, CA 928683201
Phone: 7144566745
NPI Identifier 1992064976
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Dr. James J Lee , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1010 W La Veta Ave, Suite 570, Orange, CA 928684300
Phone: 7148357700
NPI Identifier 1750358735
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Dr. John Gunn Lee , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
101 The City Drive South, Uci Medical Center, Orange, CA 928680509
Phone: 7144568978
NPI Identifier 1487734521
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Dr. Robert Hae Lee , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
101 The City Dr S Bldg 22c, Orange, CA 928683201
Phone: 8887174463
NPI Identifier 1669583530
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Kristi Sue Lindsey , FNP-C

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1140 W La Veta Ave, Ste 555, Orange, CA 92868
Phone: 7148355100
NPI Identifier 1891878831
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Dr. Christina Ling , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
101 The City Dr S Bldg 22c, Orange, CA 928683201
Phone: 8887174463
NPI Identifier 1093133183
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Dr. Pavan Kumar Mankal , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
101 The City Dr S, Orange, CA 928683201
Phone: 7144568888
NPI Identifier 1760777320
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Dr. William H Metzger , MD

Internal Medicine - Gastroenterology

Active NPI Status
1010 W La Veta Ave, Suite 570, Orange, CA 928684300
Phone: 7148357700
NPI Identifier 1629040308
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Frequently Asked Questions about Internal Medicine - Gastroenterology in Orange

How do I check a Internal Medicine - Gastroenterology 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.