Background In the 1950s the socialist health policy in East Germany did not follow a clear-cut course with regard to outpatient medical care. Whilst state-run policlinics gradually took the place of doctors in private practice, the required qualifications of physicians working in outpatient care remained unclear. After preparatory lobbying by committed physicians from the outpatient sector, the 1960 Weimar Health Conference finally paved the way for the preservation and professionalization of general practice in East Germany. Aim The article analyzes the formation of general practice as a specialty in East Germany between 1945 and 1990. We scrutinize the status of general practitioners and their field in the socialist health system as well as the foundation of their medical society. Our paper aims to contribute to a broader history of general practice in Germany. Methods We draw on literature from that time, unpublished archival material, and interviews with contemporary witnesses. Results After the establishment of standards for specialist training in the early 1960s, general practice was introduced as a field of specialty in 1967. By this, East Germany had a compulsory specialist training in general practice much earlier than West Germany. In 1971, a specialist society for general practice was founded in East Germany. However, institutionalization at the medical faculties was still lacking. Meanwhile, the nationalization of outpatient care continued. In the years that followed, primary medical care was increasingly provided in policlinics. In 1989, of 40,000 physicians in the GDR, only about 340 were still practicing in their own offices. Conclusion Within the nationalized GDR health system a committed group of physicians, under difficult political circumstances, pushed for professionalization of general practice and its recognition as a field of specialty. When general medicine was recognized as a specialty in 1967, this happened earlier than in other countries and constituted an important milestone.