Diabetes Knowledge Score

The goal of this quasi-experimental clinical study is to learn whether a telemedicine-based behavioral intervention can improve health outcomes among adult patients with diabetes receiving care at tertiary hospitals in Northwest Amhara, Ethiopia. The main questions it aims to answer are: * Does a telemedicine-based behavioral intervention improve glycemic control (HbA1c) among diabetic patients? * Does the intervention improve medication adherence among diabetic patients? * Does the intervention improve diabetes self-care practices? * Does the intervention increase patients' knowledge about diabetes? * Does the intervention reduce hospital admissions among diabetic patients? We will compare patients who receive telemedicine-based counseling with patients who receive usual care to see if the intervention improves glycemic control, medication adherence, self-care practices, diabetes knowledge, and reduces hospital admissions. Participants will: * Receive structured telephone-based education every two weeks for three months (intervention group only) * Participate in 30-50-minute counseling sessions during the first call and 15-30 Minutes sessions during subsequent calls (intervention group only) * Receive education on diabetes basics, nutrition and meal planning, physical activity, medication management, blood glucose monitoring, complication prevention, and psychosocial support (intervention group only) * Engage in interactive discussions and receive individualized guidance from trained nurses (intervention group only) * Continue routine diabetes care at the hospital (both groups)