This public use file is one in a series of event-level public use files drawn from the 2017 Medical Expenditure Panel Survey (MEPS) Household Component (HC). Released as an ASCII file with SAS, SPSS, and STATA program statements and in SAS transport format, the Emergency Room Visits File provides detailed information on emergency room visits. Data are gathered from a nationally representative sample of the civilian, noninstitutionalized population of the United States and can be used to make estimates of emergency room utilizations and expenditures for calendar year 2017. Each record represents one household-reported emergency room visit reported during the 2017 portion of round 3 and rounds 4 and 5 for Panel 21, as well as rounds 1, 2, and the 2017 portion of round 3 for Panel 22 of the survey (i.e., the rounds for the MEPS panels covering calendar year 2017). The Emergency Room Visits Public Use Data File contains characteristics associated with the emergency room visit, such as, the date of the visit, types of care and services received, types of medicine prescribed during the visit, expenditures, and sources of payment associated with the visit.