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DR. DEREK WAY-JUN SHEK M.D.
NPI 1154448587
Internal Medicine in San Leandro, CA

Active since March 22, 2007PECOS EnrolledAccepts Medicare Assignment
2500 MERCED STREET, SAN LEANDRO, CA 94577(510) 454-1000 Get Directions Write a Review

NPPES record last updated: February 11, 2022. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Derek Way-jun Shek M.d. NPPES

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

DR. DEREK WAY-JUN SHEK M.D. (NPI 1154448587) is an individual internal medicine provider in San Leandro, California, licensed in California (A95144) and active in the NPI registry since March 2007. He is enrolled in Medicare PECOS and is a graduate of Northwestern University Feinberg Medical School (2004).

NPPES Registry Identity

NPI1154448587
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. DEREK WAY-JUN SHEKCredential: M.D.
Location Address2500 MERCED STREETSan Leandro, CA 94577
Mailing Address2500 Merced StreetSan Leandro, CA 94577 · (510) 454-1000
Phone(510) 454-1000
Sole ProprietorYes
Medical School CMSNorthwestern University Feinberg Medical SchoolGraduated 2004
Enumeration DateMarch 22, 2007
Last NPPES UpdateFebruary 11, 2022
✔ NPI 1154448587 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 · A95144
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.
2500 MERCED STREET, San Leandro, CA 94577
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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

Dr. Derek Way-jun Shek 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 ID1456434844
PECOS Enrollment IDI20080207000617
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 94577 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.

DR. LISA M FUNG PHARM D
Pharmacist
2500 MERCED STREET
SAN LEANDRO, CA 94577
Alameda County (510) 454-1000
MRS. MARY ANN QUARTO BLOYER C.N.M.
Advanced Practice Midwife
2500 MERCED STREET
SAN LEANDRO, CA 94577
Alameda County (510) 454-1000
SOLOMON H. YOUNG R.D.
Dietitian, Registered
2500 MERCED STREET
SAN LEANDRO, CA 94577
Alameda County (510) 454-1000
VIJAY N. DAVE PHARM
Pharmacist
2500 MERCED STREET
SAN LEANDRO, CA 94577
Alameda County (510) 454-1000
BYRON MAIGUE ROMERO P.T.
Physical Therapist
2500 MERCED STREET
SAN LEANDRO, CA 94577
Alameda County (510) 454-1000
MRS. AMELIA GRACE FOOS O.T.
Occupational Therapist (Pediatrics)
2500 MERCED STREET
SAN LEANDRO, CA 94577
Alameda County (510) 454-1000
SHANNON LIU-KU MD
Pediatrics
2500 MERCED STREET, HOSPITAL BUILDING, NICU
SAN LEANDRO, CA 94577
Alameda County (510) 454-1000
DR. MONIKA YADAV M.D.
Internal Medicine
2500 MERCED STREET
SAN LEANDRO, CA 94577
Alameda County (510) 454-1000

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 Derek Shek's NPI number?

The NPI number for Derek Shek is 1154448587. It was assigned to this individual provider in the NPPES registry on March 22, 2007.

Where is Derek Shek located?

Derek Shek practices at 2500 Merced Street, San Leandro, CA 94577. The listed phone number is (510) 454-1000.

What is Derek Shek's specialty?

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

Is Derek Shek enrolled in Medicare?

Yes. Derek Shek 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 Derek Shek was last updated on February 11, 2022. 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.