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Justin Edward Grenet, MD

NPI 1770102915ActiveIndividual· Internal Medicine, Hematology & Oncology· Santa Rosa, CA

Internal Medicine, Hematology & Oncology (MD) in Santa Rosa, California, trained at Perelman School of Med at the University of Pennsylvania (class of 2020). Part D covered 11 prescriptions written in 2024, 100% of them generic.

Overview

NPI1770102915
StatusActive
Entity typeIndividual
CredentialMD
Sole proprietorNo
NPI issuedApr 8, 2020
Last updated in NPPESJun 30, 2026
Certified by providerJun 30, 2026

Specialties and licenses

TaxonomyCodeLicenseState
Internal Medicine, Hematology & Oncology Primary207RH0003XA209369CA

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 4, 2026No match—
New York OMIG · Nov 4, 2026No match—
Ohio Medicaid · Nov 4, 2026No match—
Pennsylvania Medicheck · Nov 4, 2026No match—
Washington HCA · Nov 4, 2026No match—

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

Medicare

Enrollment (PECOS)Enrolled Practitioner - Medical Oncology (CA)

Part D prescriptions in 2024

Prescriptions (claims)11 · 11 30-day fills
Total drug cost$50.05
Generic share100% of claims

Medicare sources and data years

Education and affiliations

Medical schoolPerelman School of Med at the University of Pennsylvania
Graduation year2020
Medicare specialtyMedical Oncology
Secondary specialtiesHematology, Internal Medicine

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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