Despite modern treatment regimens, late complications in IDDM patients are still prevalent. Even in developed countries, a significant number of patients do not get the treatment which would be considered optimal based on the present state of medical knowledge. Quality documentation provides a successful approach to unmask deficits and to improve the outcome of care. Structural aspects as well as process and outcome indicators are different in pediatric diabetology compared to the care of adult patients. The German Working Group on Pediatric Diabetology has discussed and finalized a Statement on Quality Control, including specific parameters to be recorded prospectively in all patients. Under the auspices of the German Ministry of Health, a Computer Program designed for inpatient and outpatient care in pediatric diabetology was developed. Among many other features, internal and external quality control according to the guidelines of the German Working Group are facilitated by this approach, as no separate data entry is required. This program is now widely used among pediatric – as well as some adult – diabetes centers in Germany. Regular external comparisons of quality indicators are organized by the Working Group.