Parnassus ACC, 0730-1530 weekdays
Mission Bay, 0700-1530 weekdays
Mount Zion 2330 Post St. 0800-1530 weekdays
Methodology
Hexokinase/G-6-PDH
Additional Information
This 1-hour glucose loading screen is part of a two-step screening approach used to screen pregnant patients for gestational diabetes (GDM). When this step is abnormal, it is followed by the second step "3 hour 100 gram Glucose Tolerance Test, Pregnancy."
Synonyms
Diabetes mellitus
GCT
Glucose challenge test
Sample Type
Serum
Collect
Gray top
Amount to Collect
1 mL blood
Preferred Volume
0.5 mL serum
Minimum Volume
0.2 mL serum
Remarks
This screening test may be given at any time of day, without regard to prior meals.
Stability (from collection to initiation)
Room temperature 2 days, refrigerated 7 days, frozen at -20C 3 months
Test Code
GLT1
Test Group
Glucose
Performing Lab
Parnassus, Mission Bay & Mt. Zion Chemistry
Preferred Volume
0.5 mL serum
Minimum Volume
0.2 mL serum
Stability (from collection to initiation)
Room temperature 2 days, refrigerated 7 days, frozen at -20C 3 months
Units
mg/dL
Reference Interval
1 hour post-50 g po glucose, without regard to whether patient had been fasting: 70 -129 mg/dL
Additional Information
This 1-hour glucose loading screen is part of a two-step screening approach used to screen pregnant patients for gestational diabetes (GDM). When this step is abnormal, it is followed by the second step "3 hour 100 gram Glucose Tolerance Test, Pregnancy."
CPT Codes
82950
LOINC Codes
1504-0
Available Stat
No
Test Code
GLT1
Test Group
Glucose
Performing Lab
Parnassus, Mission Bay & Mt. Zion Chemistry
Performed
Parnassus ACC, 0730-1530 weekdays
Mission Bay, 0700-1530 weekdays
Mount Zion 2330 Post St. 0800-1530 weekdays
Methodology
Hexokinase/G-6-PDH
Remarks
This screening test may be given at any time of day, without regard to prior meals.
Collect
Gray top
Amount to Collect
1 mL blood
Sample Type
Serum
Preferred Volume
0.5 mL serum
Minimum Volume
0.2 mL serum
Units
mg/dL
Reference Interval
1 hour post-50 g po glucose, without regard to whether patient had been fasting: 70 -129 mg/dL
Synonyms
Diabetes mellitus
GCT
Glucose challenge test
Stability (from collection to initiation)
Room temperature 2 days, refrigerated 7 days, frozen at -20C 3 months
Additional Information
This 1-hour glucose loading screen is part of a two-step screening approach used to screen pregnant patients for gestational diabetes (GDM). When this step is abnormal, it is followed by the second step "3 hour 100 gram Glucose Tolerance Test, Pregnancy."
CPT Codes
82950
LOINC Codes
1504-0
Ordering
Available Stat
No
Performing Lab
Parnassus, Mission Bay & Mt. Zion Chemistry
Performed
Parnassus ACC, 0730-1530 weekdays
Mission Bay, 0700-1530 weekdays
Mount Zion 2330 Post St. 0800-1530 weekdays
Methodology
Hexokinase/G-6-PDH
Additional Information
This 1-hour glucose loading screen is part of a two-step screening approach used to screen pregnant patients for gestational diabetes (GDM). When this step is abnormal, it is followed by the second step "3 hour 100 gram Glucose Tolerance Test, Pregnancy."
Synonyms
Diabetes mellitus
GCT
Glucose challenge test
Collection
Sample Type
Serum
Collect
Gray top
Amount to Collect
1 mL blood
Preferred Volume
0.5 mL serum
Minimum Volume
0.2 mL serum
Remarks
This screening test may be given at any time of day, without regard to prior meals.
Stability (from collection to initiation)
Room temperature 2 days, refrigerated 7 days, frozen at -20C 3 months
Processing
Test Code
GLT1
Test Group
Glucose
Performing Lab
Parnassus, Mission Bay & Mt. Zion Chemistry
Preferred Volume
0.5 mL serum
Minimum Volume
0.2 mL serum
Stability (from collection to initiation)
Room temperature 2 days, refrigerated 7 days, frozen at -20C 3 months
Result Interpretation
Units
mg/dL
Reference Interval
1 hour post-50 g po glucose, without regard to whether patient had been fasting: 70 -129 mg/dL
Additional Information
This 1-hour glucose loading screen is part of a two-step screening approach used to screen pregnant patients for gestational diabetes (GDM). When this step is abnormal, it is followed by the second step "3 hour 100 gram Glucose Tolerance Test, Pregnancy."
Administrative
CPT Codes
82950
LOINC Codes
1504-0
Complete View
Available Stat
No
Test Code
GLT1
Test Group
Glucose
Performing Lab
Parnassus, Mission Bay & Mt. Zion Chemistry
Performed
Parnassus ACC, 0730-1530 weekdays
Mission Bay, 0700-1530 weekdays
Mount Zion 2330 Post St. 0800-1530 weekdays
Methodology
Hexokinase/G-6-PDH
Remarks
This screening test may be given at any time of day, without regard to prior meals.
Collect
Gray top
Amount to Collect
1 mL blood
Sample Type
Serum
Preferred Volume
0.5 mL serum
Minimum Volume
0.2 mL serum
Units
mg/dL
Reference Interval
1 hour post-50 g po glucose, without regard to whether patient had been fasting: 70 -129 mg/dL
Synonyms
Diabetes mellitus
GCT
Glucose challenge test
Stability (from collection to initiation)
Room temperature 2 days, refrigerated 7 days, frozen at -20C 3 months
Additional Information
This 1-hour glucose loading screen is part of a two-step screening approach used to screen pregnant patients for gestational diabetes (GDM). When this step is abnormal, it is followed by the second step "3 hour 100 gram Glucose Tolerance Test, Pregnancy."
