SummaryThis paper describes the necessity of adapting the major classifications of mental disorders exemplified by the ICD-11 and the DSM-5 for the special needs of primary medical care. An earlier version of the classification – the ICD-10-PHC – is described, and the process of adapting it is described in detail. The new 28 item version of the classification is described, and the procedures to be adopted in the Field Trials to be held during 2013 are set out, together with the specific problems these field trials will address.