Gestational Glucose Tolerance (LABCORP)

Test Code
99901000406


Alias/See Also
LAB169: Gestational Glucose Tolerance T 2 Hr
LAB824: Fasting glucose tolerance
LAB1767: 3 HR Gestational Glucose Tolerance Test
LAB1772: Gestational Glucose Tolerance Test, Fasting
LAB100239A: 3Hr Gestational Gluc Tolerance (LabCorp) | LABCORP EAP: 102004A


CPT Codes
82951x1, 82952x1

Preferred Specimen
LABCORP LAB: YELLOW TOP (Room Temperature) Min Vol: .5


Other Acceptable Specimens
LABCORP LAB: GREY TOP: (Room Temperature) Min Vol: .5
LABCORP LAB: MICRO YELLOW: (Room Temperature) Min Vol: .5


Transport Temperature
Test Includes: 50-gram one-hour glucose tolerance challenge Special Instructions: The patient need not be fasting. The one-hour screen requires a 50-gram oral glucose load followed by a plasma glucose determination one hour later. (Refer to Additional Information below.) See the online Endocrine Appendix: Glucose Tolerance: Gestational Diabetes Mellitus for further information regarding glucose tolerance testing. Specimen: Serum or plasma Volume: 1 mL serum or plasma each tube Minimum Volume: 0.5 mL serum or plasma each tube Container: Gel-barrier tube or gray-top (sodium fluoride/potassium oxalate plasma) tube Collection: Note: A fasting blood sample is not required. Draw one hour specimen after a 50-gram glucose challenge. The patient should remain seated and not smoke throughout the test. Submit 1 mL serum or plasma for one-hour specimen. Separate serum or plasma from cells within 45 minutes of venipuncture. Gray-top tubes only, may be submitted without centrifugation. Label tube with patient’s name and collection time interval (ie, one-hour). Storage Instructions: Maintain specimen at room temperature


Report Available
LABCORP LAB
STAT: 5760 min
Routine: 5760 min
Extended TAT: No TAT min
Timed: 5760 min
Life or Death: 5760 min



Last Updated: March 6, 2023


The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.