The Dr. Güldener Group is the market leader in the field of billing for healthcare service providers - with an annual billing volume of several billion euros. For 70 years now, we have been relieving our customers of administrative tasks, creating liquidity and offering security against bad debts. Our sophisticated, high-quality products, along with our customer focus, our powerful IT systems and our expertise, form the basis of our long-term success. The group of companies employs around 1,500 people at seven locations in Germany. Our group of companies includes the Deutsches Zahnärztliches Rechenzentrum GmbH (DZR), the Apotheken- und Ärzte-Abrechnungszentrum Dr. Güldener GmbH (AÄA) and the Optica Abrechnungszentrum Dr. Güldener GmbH (Optica).