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Glucose Tolerance Blood Test (3 Specimens)

Total reviews 420

$66.00 $44.00

Total reviews 420


  • Tests Included: 4

  • Est. 1-3 (business days) Turnaround

  • Specimen type: Blood

  • Quest Diagnostics Location

This test is used for the routine diagnosis of diabetes in non-pregnant adults. Three tests are run every hour. For pregnant females see test "Glucose Tolerance Test, Gestational, 4 Specimens (100 g)". For appropriate interpretation of this test, the patient must fast overnight and ingest a 75 g load of glucose. Immediately after, a fasting specimen is obtained. The diagnosis of diabetes is made if the fasting glucose is ≥126 mg/dL or if the 2-hour specimen is ≥200 mg/dL.

$66.00 $44.00
  • Tests Included: 4

  • Est. 1-3 (business days) Turnaround

  • Specimen type: Blood

  • Quest Diagnostics Location

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Fasting, 1-Hour, 2-Hour glucose

  • Test Code: 23475
  • CPT Code: 82951
  • Alternate Name: Glucose Tolerance Test, 3 Specimens (75g) Blood Test
  • Test Instructions : Fasting required. Fasting is defined as no consumption of food or beverage other than water for at least 8 hours before testing.

    Please do not exercise prior to testing. It is best that your blood is taken in a rested state.

  • Fasting: Yes
  • Methodology: Spectrophotometry (SP)
  • Results In: 1-3

    Note: Turn around times on results are an estimate and are not guaranteed. The lab may need additional time due to holidays, confirmation/repeat testing, etc. You can contact us to discuss when your results should be ready and we will contact the lab on your behalf immediately.

American Diabetes Association
Diagnostic Criteria for Diabetes Mellitus

Glucose Value (mg/dL)

Interpretation Fasting1-Hr  Tolerance 2- Hr Tolerance
Normal <100 <140
Impaired Fasting 100-125  
Impaired Tolerance   140-199
Diabetes ≥126* ≥200*

Must be confirmed by testing on a subsequent day.

$66.00 $44.00

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