Yes, it is possible to switch back to public health insurance after having private insurance, but it can be challenging, particularly if you do not become a salaried employee. If you are in one of the voluntarily insured categories like freelancers or are self-employed, public insurance companies will not be forced to accept you. If you do become an employee later, your annual salary must be less than €66,600. When you are older than 55, it is practically impossible to switch back to public insurance.