Ventura County Hematology Oncology Specialists | 212 followers on LinkedIn. Ventura County Hematology Oncology Specialists Medical Group was originally founded in 1971 with the goal of providing the highest quality of care for patients with cancer and blood disorders with office locations in the coastal cities of Ventura, Oxnard and Camarillo. Physicians are board certified in Internal Medicine, Hematology and Medical Oncology. They are also active participants and leaders of the Cancer Center of Ventura County located in Oxnard and the Coastal Communities Cancer Center in Ventura.