Exams and Tests of diabetes.

Type 2 diabetes is diagnosed with the following blood tests:
Fasting blood glucose level -- diabetes is diagnosed if higher than 126 mg/dL on 2 occasions.
Random (non-fasting) blood glucose level -- diabetes is suspected if higher than 200 mg/dL and accompanied by the classic symptoms of increased thirst, urination, and fatigue (this test must be confirmed with a fasting blood glucose test).
Oral glucose tolerance test -- diabetes is diagnosed if glucose level is higher than 200 mg/dL after 2 hours.