What is the difference between PRN and per diem employment

In the healthcare industry, PRN and per diem are terms used to describe different types of nursing positions. PRN, which stands for "pro re nata", refers to nurses who are only needed in specific medical situations, resulting in a flexible work schedule. On the other hand, per diem nurses work various shifts at different locations and have an irregular work schedule. Both types of nurses cover for full-time and part-time nurses that are absent, but PRN nurses work for a single medical employer while per diem nurses can work for multiple employers. Additionally, PRN nurses are guaranteed a certain number of work shifts, while per diem nurses are not guaranteed any shifts. PRN nurses typically receive better benefits from their sole employer, while per diem nurses may earn higher compensation per shift.