The best available dioxin PBPK model for interpreting human biomonitoring data is presented. The original PBPK model was recoded from acslX to the Berkeley Madonna (BM) platform. Comparisons were made of the accuracy of the recoded model with the original model. The model is a useful addition to the ATSDR's BM based PBPK toolkit that supports risk assessors. The application of the model to real-life exposure data sets is illustrated.