To evaluate a provincial diabetes program for primary care in Tarragona 14 months after its implementation, the data provided by all centers were evaluated. The participants were 8 CAPS and the professionals of a rural area, with a reference population of 170,159. A total of 1,766 diabetic patients were sensed. 131 were type I (7.4%) and 1,635 type II (90.6%). The health care variables of 1,197 patients (67.7%) and the rate of complications of 654 (54.6%) were assessed. A high prevalence of hypertension (50.0%) and dyslipemia (40.5%) were found associated with diabetes. Overall 868 individuals (72.5%) received individualized education in the clinic; 112 of these (12.9%) were included in collective education programs for groups. At the time of this evaluation, the proportion of patients treated with insulin (174/545) was significantly higher than that found before the program (79/402, p less than 0.0001). The practice of glycemic self assessment at home was also significantly increased (82/691 versus 440/1, 124; p less than 0.0001). The initial impact on the professional and diabetic patients of our area has been remarkable. Although the planning of multicentric evaluation systems in complex, it is possible to implement it if the data and recording system are coordinated.