In plain English
Hematology and oncology are separately certifiable, but most American training programs combine them, so the same physician covers blood disorders and solid-tumour cancer care. The record reflects the combination unevenly: some file a combined specialty, some file hematology alone, some medical oncology alone.
The work is medical rather than surgical or radiation-based. Cancer care is delivered by a team in which the surgical oncologist and the radiation oncologist are different specialists with different training, so a list that says only oncologists will mix all three.
Practice has consolidated into hospital cancer centres and large independent oncology groups, in part because of how infused drugs are bought and billed. The employer on one of these records is usually more informative than the address.
Training and credentials
An internal medicine residency, then a combined hematology and oncology fellowship of about three years, with board certification in one or both fields.
Where they practise
Hospital cancer centres, large independent oncology practices and their infusion suites, academic cancer centres.
Hematologist-oncologists on the public record
Counted from what providers file about themselves, with suppression applied before anything is counted, refreshed 2026-10-05. Names, specialties and practice locations are public; work email and phone are for signed-in customers.
| State | On record | With work email | With practice phone |
|---|---|---|---|
| California | 1,924 | 1,550 81% | 1,924 |
| New York | 1,416 | 1,134 80% | 1,416 |
| Florida | 1,206 | 806 67% | 1,206 |
| Texas | 1,117 | 892 80% | 1,116 |
| Pennsylvania | 911 | 762 84% | 911 |
| Illinois | 798 | 646 81% | 798 |
| North Carolina | 598 | 413 69% | 598 |
| Ohio | 597 | 495 83% | 597 |
Closely related, and where to find them.
Closely related
- Medical oncologist The systemic therapy arm of cancer care - one of three distinct oncology professions.
- Internal medicine physician Adult general medicine, and the classification most sub-specialties are filed beneath.
- Pathologist Diagnosis from tissue and from the laboratory - a small population with large budgets.
Find them
- Hematologist-oncologists list counts by state, the fields a record carries, a sample record.
- Physicians physician data by specialty, state and employer.
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