With an increasing aging population worldwide, there is a growing need for both palliative care and geriatric medicine. It is presumed in medical literature that both specialties share similar goals about patient care and could collaborate. To inform future service development, the objective of this review was to identify what is currently empirically known about overlapping working practices. This article provides a scoping literature review on the relationship between geriatric medicine and palliative care within the United Kingdom. The review encompassed literature written between 1997 and 2019 accessed via Scopus, Web of Science, PubMed, and Google Scholar. Three themes were identified: (a) unclear boundaries between specialties, (b) communication within and between specialisms, and (c) ambiguity of how older people fit in the current health care system. We suggest that more empirical research is conducted about the overlap between palliative care and geriatric medicine to understand how interprofessional working and patient care can be improved.