Diabetes, one of the diseases with global impact on the population’s health, that affects human, social and economic plans, has come to affect an increasing percentage of the individuals and is constantly growing. Because of the economic implications within the families, of the health system and of the countries facing the problematic of diabetes, WHO (2010) supports the importance of prevention programs aimed at achieving and maintaining a healthy weight, early diagnosis of diabetes by conducting blood tests, eliminating tobacco and monitoring of blood glucose and risk factors that cause damage to blood vessels. Cognitive Behavioral Therapy (CBT) uses strategies and techniques to determine the patient's awareness and understanding of their diabetes. The case example is presented next and is used to demonstrate how a model of CBT intervention can be effectively applied for a patient diagnosed with diabetes.