Gestational Glucose Tolerance Diagnostic Test (Three-hour, ACOG Recommendations)
- Laboratory
- Labcorp
- Test code
- 102004
- Specimen
- Serum
- Fasting
- Not stated
- LOINC
- 50586-7
- Turnaround
- Within 1 day
Laboratory assay overview
Diagnose gestational diabetes
View complete laboratory reference notes
See table. Specimen* Plasma or Serum Glucose Level (Carpenter and Coustan Conversion) Plasma Glucose Level (National Diabetes Data Group Conversion) *The diagnosis of GDM can be made based on the result of the 100-gram, three-hour oral glucose tolerance test, for which there is evidence that treatment improves outcome. Either the plasma or serum glucose level established by Carpenter and Coustan or the plasma level designated by the National Diabetes Data Group is appropriate to use. A positive diagnosis requires that two or more high thresholds be exceeded. The Carpenter and Coustan conversion is used to establish Labcorp reference intervals. Fasting 70−94 mg/dL 70−105 mg/dL One-hour 70−179 mg/dL 70−190 mg/dL Two-hour 70−154 mg/dL 70−165 mg/dL Three-hour 70−139 mg/dL 70−145 mg/dL
Labcorp test directory, test code 102004