Glucose Tolerance Test, 5 Specimens
Also known as 4 HR GTT (5 Specimens), 4 HR Glucose Tolerance, Non-pregnant, Glucose Tolerance 4 HR
Before the visit
Fasting required
Fasting required. Fasting is defined as no consumption of food or beverage other than water for at least 8 hours before testing.
Specimen
- Specimen
- Five - 1 mL plasma specimens collected in fluoride/oxalate (gray-top) tubes
- Minimum volume
- 0.5 mL for each specimen
- Also accepted
- Plasma collected in each of five separate lithium heparin (green-top) tubes or sodium heparin (green-top) tubes • Serum collected in each of 5 separate tubes
- Container
- Fluoride/oxalate (gray-top) tubes
- Temperature
- Room temperature
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
Billing
CPT 82951, 82952