Home
HelpTest Code LAB4046 GLUCOSE TOLERANCE, 1 HR GESTATIONAL
Additional Codes
Internal / Beaker: LAB4046
External: GTT1GEST
Test Code: 425
PERFORMED AT
SBH LABORATORY
SRH LABORATORY
SMH LABORATORY
SPH LABORATORY
HDH LABORATORY
Specimen Requirements
Container Type: Lithium Heparin (Green Top) or Serum Separator (Gold Top)
Specimen Type: Plasma or Serum
Preferred Volume: 1 mL
Emergency Minimum Volume: 0.3 mL
Patient Prep: Diet requirements are not necessary.
Glucose Dose: 50 grams
Collection Procedure: Collect specimen 1 hour after glucose dose.
Specimen Processing: Separate serum or plasma (except NaFl) from cells within 30 minutes of collection by centrifugation. Aliquot serum or plasma into a separate tube if parent tube does not have a gel barrier. Store and transport refrigerated.
Unacceptable Conditions: Specimens not separated from cells within 30 minutes of collection (except Fluoride/Oxalate (Gray Top)).
Alternate Specimens: Plain Serum Tube (Red Top), Fluoride/Oxalate (Gray Top), EDTA Plasma (Lavender Top)
Stability:
| Temperature | Time |
|---|---|
| Room Temp | 8 hours |
| Refrigerated | 3 days |
| Frozen (-20 øC) | Unacceptable |
Method
Hexokinase Enzymatic
Synonyms
GLUCOSE CHALLENGE PREGNANT; Glucose 1HR Post Dose; 50 gm Load Glucose; Glucose 50 gm Post load
CPT Codes
82950
Medicare beneficiaries with certain risk factors for diabetes or diagnosed with pre-diabetes are covered with a specific ICD screening code. See the link provide for information. Medicare beneficiaries with a diagnoses of diabetes are not eligible for this benefit and an ABN is required.
Department
Chemistry
Test Schedule
Daily & STAT
Test Includes
Glucose-1 hr Post dose Glucola(PREG)
Reference Lab
SCHS
Remarks
This test is to be used as a screening test for gestational diabetes in pregnant patients only.