Glucose Tolerance Test (GTT), Blood, 5 Specimens

Test ID: 


CPT code:

82951, 82952 (x2)


4 HR Glucose Tolerance, Non-pregnant,Glucose Tolerance 4 HR, Non-pregnant,4 HR GTT (5 Specimens)

Clinical Use:

Diagnosis of diabetes

Specimen Type:


Requested Volume: 

1 mL

Minimum Volume: 

0.5 mL

Container Type: 

Fluoride/oxalate (gray-top) tubes

Patient Preparation: 

Fasting 8 hrs


Immediately after a fasting specimen is obtained, have patient ingest a 75 g load of glucose. Draw subsequent specimens per physician’s order. If not specificed by the physician, draw specimens 1, 2, 3 and 4 hours later. Label each with the specific draw time.
Note: Serum and plasma submissions must be separated from cells

Storage Instructions:

Room temperature

Rejection Criteria

Unspun serum or plasma separator tube (SST® or PST) • Red-top or green-top tube (serum or heparinized plasma not separated from cells) • Anticoagulants other than lithium heparin, sodium heparin or fluoride/oxalate

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MCI Diagnostic

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Tulsa, Oklahoma 74136

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Sun: 7AM-3PM

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Sun: 7AM-3PM


Mon – Sat: 7AM-11PM

Sun: 7AM-3PM

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