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Test Code GLT2 GLUCOSE TOLERANCE,2 HOUR

Important Note

Test subject to Medicare National Coverage Determination (NCD).

See Medical Necessity documentation requirements by clicking on link below:

Medicare National Coverage Determinations (NCD) Coding Policy Manual and Change Report

Additional Codes

LAB169

Performing Laboratory

Porter Hospital Laboratory

Specimen Requirements

Specimen Type:  Blood

Container/Tube:  Grey

Also Acceptable:  tiger top; lithium heparin (green)

Specimen Volume:  Full tube, submit 0.4 mL plasma/serum
Specimen Minimum Volume: 0.35 mL
Collection Instructions:
    1. Send specimen in original tube.
    2. If there is a delay in transport of >1 hour, centrifuge tube.
    3. Centrifuged SERUM samples are stable for:
        • 8 hours at room temperature
        • 7 days at 2-8 °C

Centrifuged PLASMA samples are stable for:
     • 8 hours at room temperature
     • 72 hours at 2-8°C

 

 

Specimen Transport Temperature

Refrigerated

Test Schedule / Analytical Time / Test Priority / Turn Around Time

Monday – Saturday / Not Available STAT / Routine - 4 hours

Test Classification and CPT Coding

82950; 82947

Normal Reference Values

See report.

Critical Values

<50 or >500 mg/dl