Public and academic medical ethics debates surrounding justice and age discrimination often proceed from a problematic understanding of old age that ignores the diversity of older people. This article introduces the feminist perspective of intersectionality to medical ethical debates on aging and old age in order to analyze the structural discrimination of older people in medicine and health care. While current intersectional approaches in this field focus on race, gender, and sexuality, we thus set out to introduce aging and old (...) age as an additional category that is becoming more relevant in the context of longer life expectancies and increasing population aging. We analyze three exemplary cases on the individual, institutional, and public health level, and argue that considering the intersections of old age with other social categories helps to accommodate the diverse identities of older people and detect inequality and structural discrimination. (shrink)