Check symptoms such as frequent urination, increased thirst, unexplained weight loss, blurry vision, fatigue, slow-healing wounds, frequent infections, or tingling/numbness
Use a home blood glucose meter if you have symptoms or risk factors
Get a fasting plasma glucose (FPG) blood test (no calorie intake for at least 8 hours)
Get an A1C (HbA1c) blood test
Get a 2-hour oral glucose tolerance test (OGTT) if recommended by a clinician
Use a random plasma glucose test if symptoms are present
Use urine glucose testing only as a screening/support test (not a definitive diagnosis)
If results are abnormal, repeat testing to confirm diagnosis as advised by a clinician
Seek urgent care if glucose is very high or if there are symptoms of diabetic ketoacidosis or hyperosmolar state (e.g., vomiting, deep/rapid breathing, severe dehydration, confusion)