A building or portion thereof used to provide services or treatment simultaneously to four or more patients that provides, on an outpatient basis, one or more of the following:
Treatment for patients that renders the patients incapable of taking action for self-preservation under emergency conditions without the assistance of others
Anesthesia that renders the patients incapable of taking action for self-preservation under emergency conditions without the assistance of others
Emergency or urgent care for patients who, due to the nature of their injury or illness, are incapable of taking action for self-preservation under emergency conditions without the assistance of others