prefectural hospital
A hospital operated by a prefectural government. The term is straightforward and commonly understood.
He works at a prefectural hospital.
Prefectural hospitals are often larger than municipal hospitals.
A municipal hospital run by a city, as opposed to a prefectural hospital.
A national hospital operated by the national government, typically larger and more specialized.
Compound of 県立 (prefectural) and 病院 (hospital). The reading is straightforward from the kanji.