"Health care services can be categorized into inpatient and outpatient depending on where the procedure is performed and the length of stay. Outpatient care refers to medical services and procedures, typically low-acuity ones that do not require an overnight hospital stay."
Source: Deloitte. 2018. 'Growth in outpatient care: The role of quality and value incentives'. Deloitte Insights, Deloitte Center for Health Solutions. <https://www2.deloitte.com/content/dam/insights/us/articles/4170_Outpatie.... Accessed 13 August 2020.