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DR. STEPHEN SAM-FONG CHEN M.D.
NPI 1083844179
Internal Medicine in Downey, CA

Active since July 23, 2009PECOS EnrolledAccepts Medicare Assignment
9333 IMPERIAL HIGHWAY, DOWNEY, CA 90242(562) 657-9000 Get Directions Write a Review

NPPES record last updated: March 7, 2023. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 7, 2023, Nov 6, 2021 (2 updates tracked since 2021).

About Dr. Stephen Sam-fong Chen M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. STEPHEN SAM-FONG CHEN M.D. (NPI 1083844179) is an individual internal medicine provider in Downey, California, licensed in California (A108952) and active in the NPI registry since July 2009. He is enrolled in Medicare PECOS and is a graduate of Other (2008).

NPPES Registry Identity

NPI1083844179
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. STEPHEN SAM-FONG CHENCredential: M.D.
Location Address9333 IMPERIAL HIGHWAYDowney, CA 90242-2812
Mailing Address9333 Imperial HighwayDowney, CA 90242-2812 · (800) 823-4040
Phone(562) 657-9000
Sole ProprietorYes
Medical School CMSOtherGraduated 2008
Enumeration DateJuly 23, 2009
Last NPPES UpdateMarch 7, 20232 updates tracked since enumeration
NPPES CertifiedNovember 6, 2021
✔ NPI 1083844179 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A108952
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
9333 IMPERIAL HIGHWAY, Downey, CA 90242
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Other Identifiers 1

OtherA108952CA · Medical License

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Stephen Sam-fong Chen M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5294907002
PECOS Enrollment IDI20111020000026
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90242 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. CHRISTINE C CHAVEZ-ESLAO D.O.
Anesthesiology
9333 IMPERIAL HIGHWAY
DOWNEY, CA 90242
Los Angeles County (562) 657-9960
WILLIAM SWEZEA RCP
Respiratory Therapist, Registered (Neonatal/Pediatrics)
9333 IMPERIAL HIGHWAY
DOWNEY, CA 90242
Los Angeles County (562) 657-6959

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Stephen Chen's NPI number?

The NPI number for Stephen Chen is 1083844179. It was assigned to this individual provider in the NPPES registry on July 23, 2009.

Where is Stephen Chen located?

Stephen Chen practices at 9333 Imperial Highway, Downey, CA 90242. The listed phone number is (562) 657-9000.

What is Stephen Chen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Stephen Chen enrolled in Medicare?

Yes. Stephen Chen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Stephen Chen was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.