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Michelle-Linh Nguyen, MD

NPI 1114447596ActiveIndividual· Internal Medicine· Grass Valley, CA

Opted out of Medicare from June 2025 to June 2027. Internal Medicine (MD) in Grass Valley, California, licensed in CA, with an NPI issued in June 2017. Part D covered 22 prescriptions written in 2024, 77% of them generic.

Overview

NPI1114447596
StatusActive
Entity typeIndividual
CredentialMD
Sole proprietorYes
NPI issuedJun 26, 2017
Last updated in NPPESJul 9, 2025
Certified by providerJul 9, 2025

Specialties and licenses

TaxonomyCodeLicenseState
Internal Medicine Primary207R00000XA169414CA

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)Not in the public enrollment file of Oct 1, 2026
Opt-outOpted out Jun 27, 2025 – Jun 27, 2027
Can order and referYes

During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.

Part D prescriptions in 2024

Prescriptions (claims)22 · 32 30-day fills
Total drug cost$4,099
Generic share77% of claims

Medicare sources and data years

Industry payments (Open Payments)

None reported for 2025 or 2024.

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

Other internal medicine physicians in Grass Valley

All 29 internal medicine physicians in Grass Valley · All internal medicine physicians in California