<prompt> Diabetes mellitis diagnosed when -Fasting blood glucose is 100 and post prandial 140Fasting blood sugar 125 and 2 hour postprandial blood sugar is 199Insulin level...HbA1c 6.5  <response>: Criteria for the diagnosis of Diabetes mellitus : Symptoms of diabetes plus random blood glucose concentration 11.1 mmolL 200 mgdLa or Fasting plasma glucose 7.0 mmolL 126 mgdLb or Hemoglobin A1c 6.5c or 2-h plasma glucose 11.1 mmolL 200 mgdL during an oral glucose tolerance test Reference : page 2401 Harrisons Principles of Internal Medicine 19th edition 