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Internal Medicine Providers in Garden Grove, CA

Browse 39 Internal Medicine providers listed in NPPES with a practice address in Garden Grove, California.

39 Healthcare Providers

How Garden Grove compares with the U.S.

Garden Grove has 23 clinicians in Internal Medicine per 100,000 residents, about 51% of the U.S. rate of 44.

That is 39 active clinicians in Internal Medicine with a practice address in Garden Grove, for a population of 170,964.

The California rate is 45 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 Internal Medicine in Garden Grove listed in the CMS Medicare file (29 of 29) 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.

28% of clinicians in Internal Medicine in Garden Grove listed in the CMS Medicare file (8 of 29) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is lower than 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 Garden Grove, CA

Source: CMS PECOS
PECOS Enrolled Specialists 35 In Garden Grove, CA
Part B Lab & Imaging Eligible 35 Diagnostic Referrals
DME Ordering Eligible 35 Durable Medical Equipment
Home Health Agency Referrals 35 HHA Ordering Eligible
Showing 1โ€“20 of 39 providers
With recent CMS data first, then Aโ€“Z

Dr. Negin Behazin , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
12462 Brookhurst St, Garden Grove, CA 928404759
Phone: 7146369850
NPI Identifier 1497076301
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Dr. Bryan Choi , MD

Internal Medicine

Active NPI Status
12751 Harbor Blvd, Garden Grove, CA 928405800
Phone: 8884999303
NPI Identifier 1255525499
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Dr. Douglas George Clark , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
12665 Garden Grove Blvd, Suite 301, Garden Grove, CA 928431901
Phone: 7145307373
NPI Identifier 1780688572
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Dr. Danh Thanh Dan , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
12688 Chapman Ave, Suite 3116, Garden Grove, CA 928404041
Phone: 7146979347
NPI Identifier 1790917631
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Dr. Michael Minh Dao , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
9191 Westminster Ave, Garden Grove, CA 928442751
Phone: 7148992000
NPI Identifier 1437321932
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Dr. Robert Tae Ha , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
9896 Garden Grove Blvd, Garden Grove, CA 928441643
Phone: 7146363032
NPI Identifier 1750302188
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Dr. Asaad Hakim , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
12665 Garden Grove Blvd, #502-A, Garden Grove, CA 928431901
Phone: 7145377800
NPI Identifier 1477504082
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Dr. Julie Hwynn , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
12555 Garden Grove Blvd, Suite 301, Garden Grove, CA 928431902
Phone: 7147410501
NPI Identifier 1780682401
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Dr. Shireen Zynab Khalife , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
12665 Garden Grove Blvd Ste 502, Garden Grove, CA 928431919
Phone: 7145377800
NPI Identifier 1962922393
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Dr. Edward Ko , MD

Internal Medicine

Active NPI Status
12751 Harbor Blvd, Garden Grove, CA 928405800
Phone: 8884999303
NPI Identifier 1396911798
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Dr. Son Thanh Le , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
8887 Westminster Ave, Garden Grove, CA 928442608
Phone: 7146983880
NPI Identifier 1861441552
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Dr. Tam Canh Le , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
9746 Westminster Ave, Suite D3, Garden Grove, CA 928442984
Phone: 7146439442
NPI Identifier 1336381607
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Dr. Se-Young Lee , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
12665 Garden Grove Blvd Ste 203, Garden Grove, CA 928431916
Phone: 7144685490
NPI Identifier 1144336967
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Dr. Euil Lim , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
12601 Garden Grove Blvd, Garden Grove, CA 928431908
Phone: 7145375160
NPI Identifier 1770930828
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Dr. Adriana Cervantes Longo , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
12100 Euclid St, 3rd Floor, Garden Grove, CA 928403304
Phone: 7147413685
NPI Identifier 1124004999
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Dr. Daniel Luong , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
9191 Westminster Ave, Garden Grove, CA 928442751
Phone: 7148992000
NPI Identifier 1811420508
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Dr. Philip A.r.l. Lynn , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
14411 Brookhurst St, Ste D, Garden Grove, CA 928434667
Phone: 7148394545
NPI Identifier 1326044819
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Dr. Hung Nguyen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
10900 Westminster Ave Ste 3, Garden Grove, CA 928434984
Phone: 7145390444
NPI Identifier 1538181763
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Dr. Nga Nguyen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
12100 Euclid St, Garden Grove, CA 928403304
Phone: 7147413522
NPI Identifier 1346447984
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Dr. Nhan X Nguyen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
10298 Westminster Ave, Garden Grove, CA 928434830
Phone: 7145378269
NPI Identifier 1528248770
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Frequently Asked Questions about Internal Medicine in Garden Grove

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.