Many national and international professional organizations have called for increased integration of oncology and palliative care in order to meet the supportive care needs of cancer patients, but to date, there has been a lack of a global consensus on an acceptable level of integration of oncology and palliative care. Study Group members initiated a Delphi survey (three iterations) to develop an international consensus on indicators for the integration of specialty palliative care and oncology programs for hospitalized advanced cancer patients. Respondents, mostly from North America and Europe, reached consensus on 13 major and 30 minor indicators. Major indicators were related to clinical structure (e.g., presence of palliative care inpatient team), processes (e.g., early palliative care referral), outcomes (e.g., median time from diagnosis to palliative care consultation), and education (e.g., routine rotation of oncology fellows to palliative care). The indicators can be used to identify centers with a high level of integration and to facilitate benchmarking, quality improvement, and research.