PGY, short for post-graduate year, is a numerical scheme denoting the duration of residency of medical residents and house officers in North America. It is used to stratify responsibility in most training programs, and is used to determine salary. As an example, PGY-1 would refer to the first year of residency.

In some teaching institutions, trainees are required to indicate level of training on all signatures; a PGY-level is usually added to signatures (for example, John Doe, M.D., PGY-1 or R-1).