noun
health insurance doctor
A doctor who is registered with the health insurance system and can treat patients under public health insurance.
この病院には健康保険医が常駐している。
A health insurance doctor is stationed at this hospital.
健康保険 refers to the health insurance system itself, while 健康保険医 is a doctor who participates in that system.
Compound of 健康保険 (health insurance) and 医 (doctor).