The Bikini Bottom Hospital is the only hospital that has been used and seen throughout the series, making its debut appearance in the episode "Suds."
The hospital was first seen in the episode, "Suds," where SpongeBob goes to at the end of the episode to find treatment for his suds, an aquatic variation of the flu. The first doctor seen in the hospital was Purple Doctorfish. Later in the series, more doctors and nurses have been employed.
The interior of the hospital has changed extensively throughout its appearances in the series. In its debut appearance, it only features one large, chrome doctor's room, belong to Purple Doctorfish. Throughout the series continuity, many rooms have been added, such as a waiting room, several hallways, large medical rooms, and other rooms.
The exterior of the hospital, unlike its interior, has not changed much if at all. The exterior contains an arch, designed to appear as one-half of a lifebuoy. The main makeup of the building is basically a wooden cube. Expenditures, such as windows and blue building-like extensions, are present throughout the exterior of the building.
List of patients and visitors
Throughout the series, many of the main and background characters have made appearances in the hospital, either as patients or visitors. A list of the well-known characters can be seen below.