noun
insurance identification certificate
Formal term used in Japanese health insurance and social insurance systems. Refers to the physical certificate that proves enrollment.
病院に行くときは、被保険者証を持って行ってください。
When you go to the hospital, please bring your insurance identification certificate.
保険証 is a more common, everyday term for an insurance card, while 被保険者証 is a formal, official designation used in administrative contexts.
Compound of 被保険者 (insured person) and 証 (certificate).