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Internal Medicine Providers in Cerritos, CA

Browse 23 Internal Medicine providers listed in NPPES with a practice address in Cerritos, California.

23 Healthcare Providers

How Cerritos compares with the U.S.

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

That is 23 active clinicians in Internal Medicine with a practice address in Cerritos, for a population of 47,867.

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.

100% of clinicians in Internal Medicine in Cerritos listed in the CMS Medicare file (15 of 15) 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.

20% of clinicians in Internal Medicine in Cerritos listed in the CMS Medicare file (3 of 15) 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 Cerritos, CA

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

Dr. Jihae Bahng , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
21750 Center Court Dr South, Suite 650, Cerritos, CA 90703
Phone: 3236288671
NPI Identifier 1770964389
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Dr. Ki Sung Che , MD

Internal Medicine

Active NPI Status
12506 South St, Cerritos, CA 907037134
Phone: 5628090142
NPI Identifier 1922139906
View Full Profile

Dr. Joyce Iwen Chou , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
10820 183rd St, Cerritos, CA 907038013
Phone: 8008234040
NPI Identifier 1497017503
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Dr. Mark Michael Chung , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
11821 South St, Cerritos, CA 907036825
Phone: 5629915679
NPI Identifier 1740290378
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Dr. Robert A Collen , MD

Internal Medicine

Active NPI Status
10802 College Pl, Cerritos, CA 907031505
Phone: 7143970768
NPI Identifier 1538267125
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Dr. Pinal Doshi , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
16510 Bloomfield Ave, Cerritos, CA 907039346
Phone: 5622290902
NPI Identifier 1326062712
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Dr. John Ford , MD

Internal Medicine

Active NPI Status
12900 Park Plaza Dr Ste 150, Cerritos, CA 907039329
Phone: 5629774639
NPI Identifier 1922071596
View Full Profile
Active NPI Status Accepts Medicare Assignment
17150 Norwalk Blvd Ste 104, Cerritos, CA 907032751
Phone: 5624741605
NPI Identifier 1649231739
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Dr. Kasey Kim , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
10802 College Place, Cerritos, CA 90703
Phone: 5629249581
NPI Identifier 1992715437
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Dr. Eric Linsangan Lim , MD

Internal Medicine

Active NPI Status
11355 Abana Street, Cerritos, CA 90703
Phone: 5628608932
NPI Identifier 1902045180
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Dr. Jada Mandy Ma , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
16510 Bloomfield Ave., Cerritos, CA 907039346
Phone: 5622290902
NPI Identifier 1568440618
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Dr. Oliver Lee Mason , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
10802 College Pl, Cerritos, CA 907031505
Phone: 5629820010
NPI Identifier 1871606434
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Dr. Ardavan Mehdizadeh , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
12900 Park Plaza Dr, Suite 150, Cerritos, CA 907039329
Phone: 5622070139
NPI Identifier 1013338730
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Dr. Senthilraj Nadarajah , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
12855 Moorshire Dr, Cerritos, CA 907037277
Phone: 2532327810
NPI Identifier 1164437935
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Dr. Lynda Tran Ngo , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
10820 183rd St, Cerritos, CA 907038010
Phone: 8008234040
NPI Identifier 1053732636
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Dr. Anthony Nguyen , MD

Internal Medicine

Active NPI Status
12900 Park Plaza Dr Ste 150, Cerritos, CA 907039329
Phone: 5629774639
NPI Identifier 1891053351
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Dr. Denise Park , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
10820 183rd St, Cerritos, CA 907038010
Phone: 5626535032
NPI Identifier 1518015338
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Dr. I-Hsiang Shu , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
10820 183rd St, Cerritos, CA 907038010
Phone: 6268172094
NPI Identifier 1790218774
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Dr. William Peter Sim , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
10820 183rd St, Dept Of Internal Medicine, Cerritos, CA 907038013
Phone: 5626535000
NPI Identifier 1902166531
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Dr. Jeffrey Han Tavis , MD

Internal Medicine

Active NPI Status
12900 Park Plaza Dr, Ste 150, Ms 7110, Cerritos, CA 907039329
Phone: 5627414470
NPI Identifier 1750568242
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Frequently Asked Questions about Internal Medicine in Cerritos

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.