This study describes the results of a retrospective study carried out to evaluate the hospitalizations of patients with type 2 diabetes admitted from January to June 2001 in the teaching hospital "SS. Annunziata" of Chieti. This research evaluates the generic appropriateness using the PRUO manual and the specific appropriateness using the guidelines approved by Italian Diabetes Association, Italian Diabetes Society and Italian College of General Practitioners. A sample of 196 medical charts was examined. The percentage of inappropriate admission was 21.9%. The "critical" clinical conditions of patients were responsible for only 23.7% of inappropriate admissions. The first reason of the inappropriateness of the admission was the execution of diagnostic examinations (60.5%), followed by the execution of medical therapy (23.2%) and waiting for surgical intervention (16.3%). 46.5% of inappropriate hospitalization was prescribed by specialists. Concerning specific appropriateness, 42.3% of hospitalization was inappropriate. These findings suggest that a system for the assessment of disease management of diabetes should be started up in the Abruzzo region. Moreover, guidelines utilization should be implemented in order to get a more correct utilization of acute hospital by specialists and GPs.