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STEPHEN CHEN M.D.
NPI 1265601553
Internal Medicine in Oakland, CA

Active since February 21, 2008PECOS EnrolledAccepts Medicare Assignment
1800 HARRISON ST, 7TH FLOOR, OAKLAND, CA 94612(510) 625-6262 Get Directions Write a Review

NPPES record last updated: December 20, 2021. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Stephen Chen M.d. NPPES

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

STEPHEN CHEN M.D. (NPI 1265601553) is an individual internal medicine provider in Oakland, California, licensed in California (A102205) and active in the NPI registry since February 2008. He is enrolled in Medicare PECOS and is a graduate of Other (2005).

NPPES Registry Identity

NPI1265601553
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameSTEPHEN CHENCredential: M.D.
Location Address1800 HARRISON ST, 7TH FLOOROakland, CA 94612-3466
Mailing Address1800 Harrison StOakland, CA 94612-3466
Phone(510) 625-6262
Sole ProprietorNo
Medical School CMSOtherGraduated 2005
Enumeration DateFebruary 21, 2008
Last NPPES UpdateDecember 20, 2021
✔ NPI 1265601553 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 · A102205
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.
1800 HARRISON ST, Oakland, CA 94612
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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

Stephen 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 ID3678631017
PECOS Enrollment IDI20081029000231
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 94612 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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 20

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

JENNY VONG PHARMD
Pharmacist
1800 HARRISON ST
OAKLAND, CA 94612
Alameda County (916) 600-4771
KHOA DANG VU M.D.
Internal Medicine
1800 HARRISON ST, 7TH FLOOR
OAKLAND, CA 94612
Alameda County (510) 625-5947
CORINNE PAYNE
Pharmacist
1800 HARRISON ST
OAKLAND, CA 94612
Alameda County (510) 987-1000
DR. ELIKA KETABCHI PHARM.D.
Pharmacist
1800 HARRISON ST
OAKLAND, CA 94612
Alameda County (510) 987-1000
ANDREA BAOWANG AJAYI MD
Emergency Medicine
1800 HARRISON ST, 7TH FLOOR
OAKLAND, CA 94612
Alameda County (510) 625-6262
DR. JULIE NGUYEN DO PHARMD
Pharmacist
1800 HARRISON ST
OAKLAND, CA 94612
Alameda County (510) 625-2402
DR. KEVEN MICHAEL MUMM PHARMD
Pharmacist
1800 HARRISON ST
OAKLAND, CA 94612
Alameda County (510) 625-4851
DR. WILLIAM M GALLAGHER PHARM.D.
Pharmacist (Pharmacotherapy)
1800 HARRISON ST, 13TH FLOOR
OAKLAND, CA 94612
Alameda County (510) 625-2361

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 1265601553. It was assigned to this individual provider in the NPPES registry on February 21, 2008.

Where is Stephen Chen located?

Stephen Chen practices at 1800 Harrison St 7th Floor, Oakland, CA 94612. The listed phone number is (510) 625-6262.

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 December 20, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.