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Oncologists

Find an oncologist in the U.S.

43,313+ licensed oncology providers across the United States. Browse by specialty, then filter by state. Sourced from the NPI Registry — the official federal registry of U.S. healthcare providers.

Medical Oncology

9,154

Medical oncologists diagnose and treat cancer with medication — chemotherapy, targeted therapy, immunotherapy, and hormonal therapy. Often the lead physician coordinating care.

Hematology & Oncology

18,142

Hematologist-oncologists treat both blood cancers (leukemia, lymphoma, myeloma) and solid tumors. In most U.S. practices, the same physician covers both specialties.

Radiation Oncology

8,729

Radiation oncologists use radiation therapy to treat cancer — external beam, brachytherapy, proton therapy, and SBRT. Often works alongside medical and surgical oncologists.

Surgical Oncology

0

Surgical oncologists specialize in cancer surgery — biopsies, tumor removal, and complex cancer operations. Some subspecialize in specific organ systems.

Gynecologic Oncology

2,554

Gynecologic oncologists treat cancers of the female reproductive system — ovarian, uterine, cervical, vulvar, and vaginal cancer.

Pediatric Hematology-Oncology

4,734

Pediatric hematologist-oncologists treat blood disorders and cancer in infants, children, and adolescents.

About this directory: Provider data is sourced directly from the NPI Registry — the federal directory of licensed U.S. healthcare providers maintained by CMS. We list providers whose primary or secondary taxonomy matches one of the six oncology specialties shown.

This is not a quality ranking. NPI registration indicates licensure, not endorsement. Always verify current practice details with the provider directly.