Objectives: The survey assessed doctor preference in prescribing insulin in a FlexPen™ in diabetes patients in the Philippines under normal clinical practice conditions.The data was based from observations on the use of NovoMix® 30 FlexPen™ (Biphasic Insulin Aspart30). Data was collected from 256 doctors who were specialised in treating patients with diabetes and had their clinics in the Philippines. A Doctor Preference Questionnaire was developed to assess doctor preference in specific terms of ease of learning and teaching use of FlexPen™, time spent for patient training in use of FlexPen™, ease of setting up the required dose of FlexPen™, DoctorÊs satisfaction of shifting from any other device to FlexPen™, confidence that the correct amount of insulin will be injected, feedback about the NovoFine® 30G needles, overall experience with FlexPen™. Background: The accuracy and convenience of pen devices for insulin injection have improved quality of life for patients with insulin-treated diabetes mellitus (DM). Prefilled, disposable pens have the advantage of simplicity, with minimal training and attention required and these offer improvements in compliance, freedom and flexibility. Results: In total, 256 doctors participated and completed the doctor satisfaction questionnaire. Majority of doctors 62.1% felt learning / teaching the use of Flexpen to the patients was "very easy ".