A451 2,134,870 (per patient mean 55) primary care contacts; 1,200,142 (31) laboratory tests and 24,656 (0.63) hospitalizations. Mean annual resource use almost doubled the first year after diagnosis and remained on a higher level than before diagnosis throughout the study period. This pattern was seen in primary care as well as for hospitalizations. Furthermore, obesity at baseline appeared to be correlated with a higher level of resource use. The relationship between resource use, baseline weight and weight changes appears complex. ConClusions: Data from 183,614 patient years of follow-up show that T2DM diagnosis is associated with increased long-term resource use. Quantifying resource utilization using data from clinical practice setting may provide an important input to diabetes cost-effectiveness modeling and resource allocation decisions.