Ageism is defined as the intentional and/or subconscious discrimination against elderly people. Despite the prevalence of ageism, nurses are able to offset prejudice against the elderly and improve the quality of health care for older patients by educating patients, families, and health care providers about the effects of ageism and by advocating for the delivery of unbiased care. In order to discuss the extent to which ageism affects the quality of health care and nursing practice, this paper reviews the published literature pertaining to ageism. Elderly cancer patients are even more affected by ageist attitudes and beliefs, and as a result experience poorer health outcomes. Future research should continue to explore the effects that ageism has on the health of the elderly so that changes to nursing practice and health care policy can be made, thereby providing all patients with high-quality health care.