Parliament passed the government-proposed health legislation earlier this month despite objections from human rights groups and the medical community who say it would bar doctors from caring for demonstrators hurt in protests.
President Abdullah Gul's office said he endorsed the legislation today.
It calls for fines and a maximum three years in prison for treatment of patients without Health Ministry authorisation except for unexpected emergencies. It specifically forbids the establishment of clinics without government permit.
An Associated Press report last week revealed that authorities had assaulted doctors with tear gas, pressured them to reveal names of patients and ignored calls for more resources during the summer's anti-government protests.