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Nicolaj Andersen, MD

NPI 1659455640ActiveIndividual· Internal Medicine, Hematology & Oncology· Santa Rosa, CA

Internal Medicine, Hematology & Oncology (MD) with Permanente Medical Group Inc, practicing in Santa Rosa, California. Part D covered 2,117 prescriptions written in 2024, 60% of them generic.

Overview

NPI1659455640
StatusActive
Entity typeIndividual
CredentialMD
Sole proprietorNo
NPI issuedOct 25, 2006
Last updated in NPPESDec 22, 2021

Specialties and licenses

TaxonomyCodeLicenseState
Internal Medicine, Hematology & Oncology Primary207RH0003XA90797CA

About license numbers in NPPES

Exclusion screening

ListResultDetails
HHS-OIG LEIE · Oct 9, 2026No matchChecked by NPI and by name + state
North Carolina Medicaid · Nov 10, 2026No match—
New York OMIG · Nov 10, 2026No match—
Ohio Medicaid · Nov 10, 2026No match—
Pennsylvania Medicheck · Nov 10, 2026No match—
Washington HCA · Nov 10, 2026No match—

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

Medicare

Enrollment (PECOS)Enrolled Practitioner - Hematology/Oncology (CA)

Part D prescriptions in 2024

Prescriptions (claims)2,117 · 3,002 30-day fills
Patients316
Total drug cost$9,996,808
Generic share60% of claims

Medicare sources and data years

Education and affiliations

Graduation year1997
Medicare specialtyHematology/Oncology
Secondary specialtiesInternal Medicine

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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