AOK Bundesverband

AOK Bundesverband, also known as AOK Health Insurance or Allgemeine Ortskrankenkasse, is the federal association that represents the regional AOK health insurance funds operating under Germany’s statutory health insurance system. It coordinates the provision of compulsory health insurance benefits to members, including coverage for medical treatment, hospitalization, preventive care, and sickness benefits. The organisation works with healthcare providers, employers, and public authorities to ensure that the benefits mandated by the Fifth Book of the Social Code (SGB V) are delivered uniformly across its member funds.

As the largest statutory health insurance umbrella organization in Germany, AOK Bundesverband serves a substantial share of the population, with its member funds collectively insuring millions of residents nationwide. Its reach extends to all federal states, where each regional AOK operates under the strategic guidance and shared services of the federal association. This extensive footprint enables AOK to negotiate nationwide contracts with hospitals and physicians and to participate in national health policy discussions. In addition to core insurance functions, AOK Bundesverband coordinates preventive care and health promotion programs that are offered to its insured members across Germany.

AOK Bundesverband is a public‑law corporation (Körperschaft des öffentlichen Rechts) and does not have private owners; it is governed by the boards of its member funds and supervised by federal health authorities. The association provides centralised functions such as data exchange, IT services, and quality management, which support the operational efficiency of the regional AOKs. In May 2023, several AOK health insurers were affected by a vulnerability in the MOVEit Transfer software used for data exchange with external partners, prompting the temporary suspension of external connections and a coordinated response with the national cybersecurity authority.