FONASA

FONASA, also known as Chile's National Health Fund, is the public institution responsible for managing the financing of the country's public health system. It receives mandatory contributions from formal sector workers, employers and transfers from the national government, which are pooled into a common fund. These pooled resources are used to purchase a broad range of health services from both public and private providers that participate in the scheme. By acting as the central payer, FONASA ensures that eligible residents obtain access to essential medical care, including preventive services, outpatient consultations, inpatient hospitalization, maternity care and prescribed medications. The fund also administers supplemental programs such as dental and optical care for qualifying beneficiaries. Coverage is extended to individuals across all income levels, with benefit levels adjusted according to income‑based contribution groups. FONASA maintains a nationwide network of regional offices that facilitate enrollment, beneficiary verification and coordination with local health facilities. In addition to financing services, the organization oversees the quality and accountability of providers through monitoring mechanisms and payment audits.

As a decentralized public service, FONASA operates under the authority of Chile's Ministry of Health and is overseen by a governing board. Its primary distinguishing attribute is that it is the sole administrator of the National Health Fund, giving it a central role in the country's health financing architecture. The fund's regulatory responsibilities include establishing reimbursement schedules, setting copayment rates for each income tier and monitoring compliance with service delivery standards. FONASA classifies beneficiaries into four income‑based groups (A, B, C, D) that determine the level of subsidies and out‑of‑pocket contributions required for care. This tiered structure aims to provide progressive financing, whereby higher‑income contributors support broader access for lower‑income populations. Structurally, the organization maintains a central headquarters in Santiago, Chile, supported by regional directorates that manage local provider contracts and beneficiary services. The organization's profile attracted international attention in February 2023 when the BlackCat ransomware group claimed to have infiltrated its IT systems, releasing screenshots of beneficiary correspondence, employee identification files and healthcare payment records. Although the victim and national cybersecurity authorities have not released a detailed post‑incident report, the attackers stated they would soon publish the exfiltrated data, highlighting the vulnerability of public health institutions to cyber extortion.