Observational Study to Evaluate the Safety While Using Levemir®

Inclusion Criteria: * After the physician decision has been made to use insulin detemir, any subject with Type 1 or Type 2 diabetes mellitus is eligible for the study, including newly-diagnosed subjects who have never received insulin or an insulin analogue before. The selection of the subjects will be at the discretion of the individual physician. Exclusion Criteria: * Subjects who are unlikely to comply with protocol, e.g., uncooperative attitude, inability to return for the final visit; * Subjects currently being treated with insulin detemir; * Subjects who previously enrolled in this study * Subjects with a hypersensitivity to insulin detemir or to any of the excipients * Pregnancy, breast-feeding, the intention to become pregnant or judged not to be using adequate contraceptive measures. (Adequate contraceptive measures are an intrauterine device, oral contraceptives and barrier methods)