All international students will be insured by Social Security Institution (Sosyal Güvenlik Kurumu - SGK) from the day that the academic year starts. The insurance will be valid for one year.
In order to activate the heath insurance, students need to pay 450TL to any branch of Ziraat Bank with their residence permit/temporary citizenship number, passport and student letter.
Health insurance allows you to get medical help and medicine by paying 20% of the subtotal which is given by the doctor with prescription. There are many state and private hospitals in Turkey. The cost that you are going to pay depends on the pricing policy of each hospital. Some of the hospitals work under complete agreements with SGK insurance and some of them require extra costs which are not covered by SGK insurance.
Even if the student has a internationally valid heath insurance; all international students in Turkey are still required to register to SGK.