NPI Lens

Wen-Yee Tsai, MD

NPI 1952425803ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Oakland, CA

Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) in Oakland, California, trained at State University of New York at Stony Brook, School of Medicine (class of 2003). Part D covered 458 prescriptions written in 2024, 85% of them generic.

Overview

NPI1952425803
StatusActive
Entity typeIndividual
CredentialMD
Sole proprietorNo
NPI issuedMar 18, 2007
Last updated in NPPESDec 21, 2021

Specialties and licenses

TaxonomyCodeLicenseState
Internal Medicine, Endocrinology, Diabetes & Metabolism Primary207RE0101XA112303CA
Internal Medicine207R00000XMD00048809WA

About license numbers in NPPES

Exclusion screening

ListResultDetails
HHS-OIG LEIE · Nov 10, 2026No matchChecked by NPI and by name + state
North Carolina Medicaid · Nov 11, 2026No match—
New York OMIG · Nov 11, 2026No match—
Ohio Medicaid · Nov 11, 2026No match—
Pennsylvania Medicheck · Nov 11, 2026No match—
Washington HCA · Nov 11, 2026No match—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)Enrolled Practitioner - Endocrinology (CA)

Part D prescriptions in 2024

Prescriptions (claims)458 · 1,352 30-day fills
Patients158
Total drug cost$37,889
Generic share85% of claims

Medicare sources and data years

Education and affiliations

Medical schoolState University of New York at Stony Brook, School of Medicine
Graduation year2003
Medicare specialtyEndocrinology
Secondary specialtiesInternal Medicine
TelehealthOffers telehealth

Medical group

Source: CMS Care Compare

Industry payments (Open Payments)

None reported for 2025 or 2024.

Receiving payments does not imply wrongdoing. What Open Payments covers ·original records

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