Can American medical insurance cards be used across states?

Generally, medical insurance cards can only be used locally, not across regions (except for special circumstances such as emergency treatment in different places). If it is a medical treatment in a different place, the patient needs to bring a social security card to the medical insurance agency where the insured person is located, and go through the formalities of registration, approval and filing for medical treatment in a different place.

Medical personnel in different places should carry social security cards to the medical insurance agencies in the insured places for registration, approval and filing of medical treatment in different places. After being approved by the institution for filing, medical personnel in different places shall follow the principle of nearest medical treatment and implement designated medical treatment. Under normal circumstances, you can choose a designated medical institution that has lived for one to three years as a designated medical institution for medical treatment in different places, and the time limit can be set to once a year.