The Leiden University Medical Center (Dutch: Leids Universitair Medisch Centrum) or LUMC, is the university hospital affiliated with Leiden University, located in Leiden, Netherlands, of which it forms the medical faculty. It resulted from the merger of the Academisch Ziekenhuis Leiden (Leiden Academic Hospital) and the medical faculty of Leiden University in the late 1990s, forming an academic health science centre. Similar arrangements exist for most university hospitals in the Netherlands.
The hospital has clinical departments of all medical specialties, and acts as a tertiary referral centre for the northern part of the province of South Holland. In addition, it has a wide range of research programmes in both clinical and basic medical research, leading to a large output of scientific publications.