<p>This article examines various legal aspects of outpatient surgery performed by different medical practitioners and institutions in Germany. In addition to outlining the legal basis for the respective practitioners, it also addresses current reform efforts. Due to the need for patient safety, the legal requirements of practice are high. Intersectoral cooperation is encouraged, although it comes with limitations due to compliance concerns. The constant advancement of the model of day surgery in times of limited healthcare and financial resources blurs sectoral boundaries, ultimately exacerbating competition between medical practitioners and institutions.</p>