Not surprisingly, alcohol-related problems have become clinically important. With effective screening, recording, diagnosing, and treating health conditions inflicted by alcohol addictions, it is possible to create the comprehensive, accurate national-scale database of alcohol dependent patients that could be applicable to statistical data accumulation and research budget allocations aiming at further addressing and ameliorating potential behavioral, health, and economic issues. However, the study, An Error in Summarized Diagnosis and Procedure that Affected the ICD Code of Psychiatric Inpatients at Siriraj hospital, which used a real time ICD coding audit,(12)revealed that 73.1% of the medical summarized diagnoses and the procedure part of medical reports contained errors, while 66.9 of these errors affected ICD at the significance level of 0.000. Among all the possible causes, 34.3% came from the lack or incomplete of secondary diagnoses (comorbidity and complication), while 37.2 % were found to be the case of accurate coding with inaccurate principal and secondary diagnoses.