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HelpCatalog ID Glu GTT 3HR Glucose Tolerance Test
CPOE Test Name
GTT 3 hour; Glucose Tolerance, Fasting
Synonyms
Glucose Tolerance, Fasting
Specimen Type
Plasma
Specimen Requirements
4 mL gray top (oxalate) tube or 5 mL light green top tube (lithium heparin); light green cap microtainer acceptable; 2 mL blood
Causes for Rejection
Wrong container; improper labeling; failure to note specimen time on specimen; insufficient quantity
Reference Values
Fasting 60 – 100 mg/dL; 30 Min 110 – 170; 1 Hour 120 – 170; 2 Hour 70 – 120; 3 Hour 50 - 100
Performing Lab
Core Laboratory, BI 2023 721-2120
Turn Around Time
Routine – 2 – 4 hours
CPT / HCPCS Code
82951 ( 3 specimens) 82952 ( beyond 3 specimens)