Objective Emergency Medicine (EM) clerkships often use a written exam to assess the knowledge gained over the course of an EM rotation in medical school. Clerkship Directors (CDs) may choose the National Board of Medical Examiners (NBME) EM Advanced Clinical Science Subject Exam (ACE), the Society for Academic Emergency Medicine (SAEM) M4 exam, which has two versions, the SAEM M3 exam, or departmental exams. There are currently no published guidelines or consensus regarding their utility. This survey-based study was designed to collect data regarding current practices of EM clerkship exam usage to analyze trends and variability in what exams are used and how. Methods The authors designed a cross-sectional observational survey to collect data from EM CDs on exam utilization in clerkships. The survey population consisted of clerkship directors, assistant clerkship directors, or faculty familiar assessments in their EM clerkship. Initial dissemination was by electronic distribution to subscribers of the Clerkship Directors in Emergency Medicine (CDEM) list-serve on the SAEM website. Subsequently, contact information of CD's from institutions that had not responded was obtained by manual search of the Emergency Medicine Residents' Association (EMRA) Match website and individual correspondence was sent at regular intervals. Data obtained include clerkship characteristics, exam used, weight of the exam relative to the overall grade, and alternatives if the preferred exam was previously taken. Results Eighty-seven programs (42% response rate) completed the survey between August 2019 and February 2021. Of the 87 responses, 71 (82%) were completed by a CD. Forty-six (53%) institutions required an EM rotation. Students were tested in 34 (74%) required EM clerkships and 48 (69%) out of 70 EM electives. In required rotations that used an exam, 20 (59%) used the NBME EM ACE, while 28 of 46 (61%) of EM electives that reported an exam used the SAEM M4 Exam. Five (15%) of the required clerkships used a departmental exam. Of clerkships requiring an exam, 46 (57%) weighed the score at 11-30% of the final grade. Data for extramural rotations mirrored that of EM electives. One-third of respondents indicated they do not inquire about previously taken exams. Conclusion This survey demonstrates significant variability in the type of exam, the weighting of the score, and alternatives if the preferred exam was previously taken. The lack of a consistent approach in how these exams are used in determining students' final EM grades diminishes the reliability of the EM clerkship grade as a factor used by residency directors in choosing future residents. Further research on optimal usage of these exams is needed.