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Internal Medicine Providers in Westminster, CA

Browse 43 Internal Medicine providers listed in NPPES with a practice address in Westminster, California.

43 Healthcare Providers

How Westminster compares with the U.S.

Westminster has 48 clinicians in Internal Medicine per 100,000 residents, close to the U.S. rate of 44.

That is 43 active clinicians in Internal Medicine with a practice address in Westminster, for a population of 89,860.

That is close to the California rate of 45.

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.

89% of clinicians in Internal Medicine in Westminster listed in the CMS Medicare file (31 of 35) accept Medicare assignment. That is lower than 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.

34% of clinicians in Internal Medicine in Westminster listed in the CMS Medicare file (12 of 35) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is similar to the California share of 38%.

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 Medicare (PECOS) Enrollment & Ordering Eligibility

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

Source: CMS PECOS
PECOS Enrolled Specialists 38 In Westminster, 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 43 providers
With recent CMS data first, then Aโ€“Z

Dr. Loc Dac Bui , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
8900 Bolsa Ave, Suite B, Westminster, CA 926835475
Phone: 7148972623
NPI Identifier 1023081387
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Dr. Khaled Chan , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
7955 Westminster Blvd, Westminster, CA 926834001
Phone: 7143793221
NPI Identifier 1255376414
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Dr. Hong P Duong , MD

Internal Medicine

Active NPI Status
15581 Brookhurst St, Westminster, CA 926837554
Phone: 7144679923
NPI Identifier 1275561417
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Dr. Paul T. Duong , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
9433 Bolsa Ave, Suite # A, Westminster, CA 926835964
Phone: 7148397332
NPI Identifier 1023181658
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Dr. Victoria Greblya , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
7955 Westminster Blvd, Westminster, CA 926834001
Phone: 7143793221
NPI Identifier 1790720969
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Dr. Andy Tuan Ho , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
9081 Bolsa Ave 109, Westminster, CA 926835590
Phone: 7148917393
NPI Identifier 1801850821
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Dr. Thu Thuy Terri Huynh , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
15571 Brookhurst St, Westminster, CA 926837554
Phone: 7147753066
NPI Identifier 1740343367
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Dr. Aruna Krishnaswamy , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
7955 Westminster Blvd, Westminster, CA 926834001
Phone: 7143793221
NPI Identifier 1548479140
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Dr. Huan D Le , MD

Internal Medicine

Active NPI Status
15355 Brookhurst St Ste 102, Westminster, CA 926837071
Phone: 7147753066
NPI Identifier 1902986664
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Dr. Trung Huu Ly , MD

Internal Medicine

Active NPI Status
10362 Bolsa Ave Ste 100, Westminster, CA 926836763
Phone: 7145310230
NPI Identifier 1669567541
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Dr. Chinh Mai , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
8251 Westminster Blvd Ste 110, Westminster, CA 926833370
Phone: 7148395898
NPI Identifier 1992017636
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Dr. Dean Ba Ngo , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
15606 Brookhurst Street, Suite B, Westminster, CA 92683
Phone: 7145310000
NPI Identifier 1982690582
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Dr. Tan Dinh Ngo , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
9431 Edinger Ave, Westminster, CA 926837425
Phone: 7148398400
NPI Identifier 1770503997
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Dr. Anhtuan Duy Nguyen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
14541 Brookhurst St, Suite D2, Westminster, CA 926835700
Phone: 7145312000
NPI Identifier 1386698660
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Dr. Cuong Viet Nguyen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
9211 Bolsa Ave, Ste 220, Westminster, CA 92683
Phone: 7148989966
NPI Identifier 1689625451
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Dr. Dao Bich Nguyen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
9211 Bolsa Ave, Suite 220, Westminster, CA 92683
Phone: 7148989966
NPI Identifier 1811948680
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Dr. Dat Manh Nguyen , MD

Internal Medicine

Active NPI Status
14536 Brookhurst St, Suite# 102, Westminster, CA 926835787
Phone: 7145312548
NPI Identifier 1871730895
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Dr. Hoa Nguyen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
5835 Westminster Blvd, Suite # A, Westminster, CA 926839109
Phone: 7148989770
NPI Identifier 1619931763
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Dr. Hung Huu Nguyen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
10362 Bolsa Avenue, Westminster, CA 926836763
Phone: 7145312091
NPI Identifier 1619921095
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Dr. Phuc Vinh Nguyen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
9500 Bolsa Ave, Ste M, Westminster, CA 926835943
Phone: 7145318915
NPI Identifier 1134123961
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Frequently Asked Questions about Internal Medicine in Westminster

How do I check a Internal 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.

Other Specialties in Westminster

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