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Mehmet F. Fer, MD

NPI 1164506887ActiveIndividual· Internal Medicine, Medical Oncology· Seattle, WA

Internal Medicine, Medical Oncology (MD) with Swedish Health Services and 1 other group, practicing in Seattle, Washington. Their prescriptions cost Medicare Part D more than their services did: $546,125 for 353 claims, against $12,953 paid for services in 2024. Merck Sharp & Dohme LLC reported $30.18 in payments in 2025, mostly food and beverage. Lists Providence Regional Medical Center Everett and 3 other hospitals as hospital affiliations.

Overview

NPI1164506887
StatusActive
Entity typeIndividual
CredentialMD
Sole proprietorNo
NPI issuedOct 25, 2006
Last updated in NPPESFeb 6, 2009

Specialties and licenses

TaxonomyCodeLicenseState
Internal Medicine, Medical Oncology Primary207RX0202XMD00023614WA

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 - Hematology/Oncology (WA)
Accepts assignmentYes (participating)

Medicare services in 2024

Medicare patients48
Services billed180 across 8 procedure codes
Paid by Medicare$12,953

Part D prescriptions in 2024

Prescriptions (claims)353 · 616 30-day fills
Patients72
Total drug cost$546,125
Generic share84% of claims

Medicare sources and data years

Education and affiliations

Graduation year1974
Medicare specialtyHematology/Oncology
Secondary specialtiesInternal Medicine

Medical groups

Hospital affiliations

Source: CMS Care Compare

Industry payments (Open Payments)

  • 2025$30.18 · 1 payment from 1 company

Top paying companies in 2025

CompanyAmountPayments
Merck Sharp & Dohme LLC$30.181

What the 2025 payments were for

  • Food and Beverage$30.18 · 1 payment

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

Other medical oncologists in Seattle

All 94 medical oncologists in Seattle · All medical oncologists in Washington