health insurance — a system (public or employer-based) that covers part of medical expenses (e.g., company insurance or national health insurance).
会社の健康保険に加入しているので診察費が安く済んだ。
Because I'm enrolled in my company's health insurance, the medical fees were cheaper.
健康保険証を病院の受付に提出してください。
Please present your health insurance card at the hospital reception.
海外で治療を受ける場合、健康保険が適用されないことがある。
When receiving treatment abroad, health insurance may not apply.