Journal of the Medical Association of Thailand Vol 104, No 2:FEBRUARY 2021 (SUPPL. 1) 0125-2208 104 2 2021 Feb Visits to the Emergency Department during the 2020 COVID-19 Outbreak in Thailand 1-4 EN Korakot Apiratwarakul Noppathon Kongudom Praew Kotruchin Pariwat Phungoen Kanlayarat Larthum Original Article To determine the numbers of ED visits by level urgency during the COVID-19 pandemic. This was a cross-sectional study. The sample consisted of patients who presented at the Srinagarind Hospital ED from January 13 to April 21, 2020 (the date of the first confirmed case of COVID-19 in Thailand according to the Ministry of Public Health and day 100). We compared these data with those from the same period over the past three years. In 2020, the total number of ED visits was 13,263, with a mean patient age of 50.14+6.40 years. Over half of these patients (56.2%; n = 7,467) were female. Most visits (50.6%) occurred between 4.00 PM to 0.00 AM (afternoon shift). The majority of were walk-ins (84.2%) and ESI 3 (non-urgent; 79.9%). The average numbers of ESI 3 patients who visited the ED over the same period in 2017 to 2020 were 152.3, 171.5, 153.0 and 105.9 per day, respectively (p<0.001). During the COVID-19 pandemic, the number of ED visits, specifically those of ESI 3 patients, was significantly lower than during the same period in previous years. COVID-19 Emergency departments Pandemics Triage