Testing for Diabetes lab tests in Walk-In Lab Lab Test Test Cost Insulin Response Blood Test, 3 Specimens $90.00 Glucose Serum Test $28.00 Cardio IQ® Insulin Blood Test $26.00 Glucose Blood Test, Two-hour Postprandial $33.00 Glucose Blood Test, Two-hour Postprandial $33.00 C-Peptide Serum Test - C-peptide Test $68.00 Glucose Blood Test, Gestational Screen (50g), 135 Cutoff $55.00 Glucose Tolerance (GTT) Blood Test, 2-Hour, 3 Specimens $68.00 Insulin Response to Glucose Blood Test, 2 Specimens $65.00 Insulin Fasting Blood Test $48.00 C-Peptide Serum Test $64.00 Gestational Diabetes Blood Test $34.00 Fructosamine Blood Test $64.00 Glucose Tolerance Test (GTT) Blood Test, 3-Hour, 4 Specimens $88.00 Glucose Plasma Test $28.00 Fructosamine Blood Test $51.00 Glucose Tolerance (GTT) Blood Test, 2-Hour (Oral WHO Protocol) $55.00 Glucose Plasma Test $25.00 GlycoMark Blood Test $98.00 Glucose Serum Test - Glucose Test $25.00 Hemoglobin (Hb) A1c With eAG Blood Test $33.00 Insulin Fasting Blood Test - Insulin Blood Test $25.00 Zinc Transporter 8 Antibody Blood Test $188.00 Gestational Diabetes Blood Test $34.00