• Advanced Radiation Oncology Services offering prostate seed implant programs and high-dose rate therapy.

• Alabama Oncology, LLC specializing in hematology, medical oncology, radiation oncology and related research.

• American Oral Cancer Clinic provides diagnosis and treatment for cancers of the head and neck.

• Beverly Hills Radiation Oncology specializing in prostate treatments.

• Bismarck Cancer Center contains links to resources, listings of support groups, and answers to frequently asked questions.

• California Endocurietherapy Cancer Center dedicated entirely to practice of brachytherapy for prostate, breast, gynecologic, soft tissue sarcoma, and other cancers.

• Cancer Center of Irvine offers patient services and conducts clinical trials.

• Cancer Clinic specializing in oncology and hematology.

• Cancer Life Center online access to board certified cancer doctors to answer all types of questions about cancer, diagnosis, treatment, and medications.

• Cascade Surgical Oncology providing comprehensive cancer care. Site includes practice information plus educational resources and links.

• CCS Oncology Center Radiation therapy center serving Buffalo and western New York.

• Central Arkansas Radiation Therapy Institute (CARTI) information and links for cancer patients, healthcare professionals and the general public from CARTI, a network of nonprofit radiation therapy centers in Arkansas.

• Centre for Children's Cancer and Blood Disorders joins children and teenagers with cancer and their parents to share their knowledge and experiences.

• Christie's Against Cancer European cancer centre.

• Cincinnati Hematology-Oncology, Inc. specializes in the care and prevention to cancer-related diseases.

• Columbus Cancer Clinic nonprofit group offering community education, screening examinations, mammograms, and home care support.

• Columbus Oncology Associates specialize in the treatment of cancer and blood disorders.

• Community Cancer Care community-based, not-for-profit provider of radiation oncology services with centers in Enfield and Manchester.

• Djerassi, Isaac MD offers intensive chemotherapy for the treatment of brain gliomas, lung cancer, mesothelioma, breast cancer, and more.

• Gamma Knife Radiosurgery brain surgery, gamma knife radiosurgery, immunotherapy, brain tumors from a neurosurgeon and neurosurgical oncologist.