健康保険 (kenkōhoken) means “health insurance”

More examples

この治療には健康保険が適用されます。ko no chi ryō ni wa ken kō ho ken ga teki yō sa re ma su

Health insurance covers this treatment.

Describes a system that shares the cost of medical care so illness or injury does not fall entirely on one person.

医療保険iryōhoken: Insurance that pays part of the cost of medical treatment and may be provided privately.

病気やけがの治療にかかる費用の一部を保険でまかなう制度。byō ki ya ke ga no chi ryō ni ka ka ru hi yō no ichi bu o ho ken de ma ka na u sei do

健康 (kenkō, "health") + 保険 (hoken, "insurance") forms 健康保険 (kenkō hoken), insurance that helps cover medical expenses.

Japanese commonly uses the verb 入る (hairu, "enter") with 健康保険 (kenkō hoken) to mean enrolling in health insurance, not entering a physical place.