The Centers for Medicare and Medicaid Services (CMS) implemented an oncology outcome measure to assess the quality of care and determine outpatient hospital payment (OP-35: Admissions and Emergency Department Visits for Patients Receiving Outpatient Chemotherapy). The measure assesses 30-day postchemotherapy rates of inpatient or emergency department (ED) events deemed “potentially avoidable” because of an association with any of the 10 CMS-defined toxicities: anemia, dehydration, diarrhea, fever, nausea, emesis, neutropenia, pain, pneumonia, or sepsis. Researchers sought to assess those events when linked to highly emetogenic chemotherapy (HEC) in patients treated with anthracycline plus cyclophosphamide (AC), carboplatin, or cisplatin. They presented the findings at the San Antonio Breast Cancer Symposium on December 7, 2018.