Check for symptoms such as increased thirst, frequent urination, unexplained weight loss, fatigue, blurred vision, or slow-healing wounds
Measure fasting plasma glucose
Measure random plasma glucose
Perform an oral glucose tolerance test
Measure HbA1c
Repeat abnormal test results on a separate day unless there are clear symptoms of hyperglycemia
Review risk factors such as family history, obesity, inactivity, gestational diabetes, or polycystic ovary syndrome
Seek medical evaluation for interpretation of results and confirmation of diagnosis