The National Health Insurance Fund (NHIF) is regulated by the Health Insurance Act (1998), which introduced the mandatory health insurance and regulates the supplementary health insurance in Bulgaria. It was founded on 15th March 1999 as an independent public institution separated from the structure of the social healthcare system and has its own bodies of management. The NHIF budget is separated from the state budget. The National Assembly on an annual basis votes it. The NHIF Budget Act determines the amount of the health insurance contribution.