We recently published findings in this journal on the prevalence of mental disorders from the German Health Interview and Examination Survey for Adults Mental Health Module (DEGS1-MH). The DEGS1-MH paper was also meant to be the major reference publication for this large-scale German study program, allowing future users of the data set to understand how the study was conducted and analyzed. Thus, towards this goal highest standards regarding transparency, consistency and reproducibility should be applied. After publication, unfortunately, the need for an addendum and corrigendum became apparent due to changes in the eligible reference sample, and corresponding corrections of the imputed data. As a consequence the sample description, sample size and some prevalence data needed amendments. Additionally we identified a coding error in the algorithm for major depression that had a significant effect on the prevalence estimates of depression and associated conditions. This addendum and corrigendum highlights all changes and presents the corrected prevalence tables. Copyright © 2015 John Wiley & Sons, Ltd.