Glucose Tolerance (GTT) Blood Test, 2-Hour, 3 Specimens

The glucose tolerance 2-hour blood test is used to assess an individual's glucose tolerance.

Quest
LabCorp

Test Code: 23475

CPT Code: 82951

Also Known As:

Methodology:

Spectrophotometry (SP)

Specimen Type: Blood

Preparation:

Fasting for 10-12 hours required. Three days prior to testing discontinue all nonessential medication that can affect glucose metabolism. Check with physician before stopping any medications. This test is collected as 3 specimens, fasting, 1 hour, and 2 hours after drinking a glucose solution at the lab. Please ensure to schedule at least 2 hours of time for your collection.

Test Results:

1-2 days. May take longer based on weather, holiday or lab delays.

Description

Order a glucose tolerance 2-hour blood test to assess glucose tolerance. The sugar that the body uses for energy is glucose. This test measures fasting glucose levels and levels several hours after ingesting a glucose solution to determine how glucose is processed over time. This type of testing is often used to help diagnose Type 2 Diabetes.

The glucose tolerance test is collected in 3 specimens, fasting, 1 hour, and 2 hours after drinking a glucose solution at the lab.

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