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HelpTest Code GTTF GLUCOSE TOLERANCE, FASTING
Additional Codes
LAB169
Performing Laboratory
Porter Hospital Laboratory
Specimen Requirements
Specimen Type: Blood
Container/Tube: Grey Top
Specimen Volume: 1.0 mL
Minimum Volume: 0.5 mL
Collection Instructions:
- Collect prior to glucose administration.
- Patient must be fasting.
- Centrifuged spcimens are stable for 24 hours refrigerated.
Specimen Transport Temperature
Refrigerated
Test Classification and CPT Coding
82947
Test Schedule/Analytical Time/Test Priority/Turn Around Time
Daily / 24 HRS / Available STAT / Routine - 4 hours
STAT - 60 minutes
Normal Reference Values
70-99 mg/dL
Critical Values
| 0 up to 18 Years | <50 or >300 mg/dl |
| 18 Years up to Unspecified | <55 or >500 mg/dL |