doctor's office; medical office; sickbay
A room in a school, company, or facility where a doctor or nurse provides medical care. Often implies a small clinic or infirmary within a larger institution.
I was allowed to rest in the school's medical office.
The factory has an attached medical office.
診療所 is a small clinic or doctor's office that serves the general public, whereas 医務室 is typically an internal facility for a specific organization.
Compound of 医 (medical) + 務 (duty, affairs) + 室 (room). The combination 医務 refers to medical affairs or duties, and 室 indicates a room or office.