Two clinicians scored the ICD–10 Research Criteria Checklist either while observing or after administering CIDI interviews to a sample of 20 subjects. Overall diagnostic concordance between clinical and CIDI assessments was found to be good (overall kappa = 0.77). Assessment of the specific diagnoses could be done only for the three most commonly represented in the studied sample: anxiety/phobic disorders (kappa = 0.73), depressive disorders (kappa = 0.78), and psychoactive substance use disorders (kappa = 0.83). While the lack of independence of the two assessments and the small, non-randomly selected sample might have exaggerated the concordance, this study shows that the CIDI provides all the data needed to score diagnoses in the ICD–10 nomenclature, as indicated by the small number of questions clinicians needed to ask following completion of the CIDI.