The emergency department data from the Oklahoma State Department of Health provides information about emergency room visits. The data can broken down in a number of ways. For more information about the methodology: https://www.health.state.ok.us/stats/Hospital_&_ASC/Hospitals/Emergency_Dept/index.shtml
Emergency Departments are required to submit data to the Oklahoma State Department of Health
"The Division of Health Care Information uses the UB04 billing format to collect inpatient discharge data."
Emergency department patients were included in the sample.