outpatient
n.a person who goes to a hospital for treatment but does not stay there overnight. You visit the doctor or get a test and then go home the same day.
n.a patient who receives medical treatment at a hospital or clinic without being admitted for an overnight stay.
“The hospital treated her as an outpatient for her broken arm.”
“Most minor surgeries are now performed on an outpatient basis, allowing patients to recover in the comfort of their own homes.”
“The new wing of the medical center is dedicated entirely to outpatient services, streamlining the process for those requiring diagnostic imaging or physical therapy without hospitalisation.”
Often used as a modifier before another noun ('outpatient clinic', 'outpatient surgery').
From out- + patient.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.