AOK NordWest is a statutory health insurance fund in Germany, operating as a public law corporation. It was established on October 1, 2010, through the merger of AOK Schleswig-Holstein and AOK Westfalen-Lippe. The organization serves approximately 2.9 million insured members across Westphalia-Lippe and Schleswig-Holstein, making it one of the largest health insurance providers in northwestern Germany.