Cancer clinics across the country have begun turning away thousands of Medicare patients, blaming the sequester budget cuts. Oncologists say the reduced funding, which took effect for Medicare on April 1, makes it impossible to administer expensive chemotherapy drugs while staying afloat financially. Patients at these clinics would need to seek treatment elsewhere, such as at hospitals that might not have the capacity to accommodate them. “If we treated the patients receiving the most expensive drugs, we’d be out of business in six months to a year,” said Jeff Vacirca, chief executive of North Shore Hematology Oncology Associates in New...