That depends on your professional activity after graduation. Your insurance status changes, and you must switch to statutory health insurance if you are employed and your income is below the compulsory insurance limit of €69,300 per year (status 2024). If you take out qualifying insurance with your insurer, you can return to private insurance later without going through health checks again. If you become self-employed or freelancing immediately after graduating, you must remain in private insurance. Usually, you can then switch to a regular adult tariff without a new health check.