14,004 Hematology & Oncology providers practice across all 50 states and Washington DC, and 62% received drug or device company payments in 2025. California has the most at 1,583. Listings are drawn from federal public records and are not endorsements.
Industry payment share ranges from 87% in Mississippi to 37% in Minnesota, among states with 25 or more providers.
Patients often search by condition rather than specialty. These are conditions typically managed by Hematology & Oncology providers. Individual practices vary, so confirm with the provider before booking.
There are 14,004 Hematology & Oncology providers with active NPI records across all 50 states and Washington DC, according to federal NPPES data refreshed monthly. California has the most at 1,583.
8,723 of 14,004 Hematology & Oncology providers nationally (62%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program. The share is highest in Mississippi at 87% and lowest in Minnesota at 37%.
Hematology & Oncology providers commonly treat breast cancer, lung cancer, lymphoma, leukemia, anemia and related conditions. Individual practices vary.
Provider counts come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.
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