Ordering Recommendation
Mnemonic
GSCN
Methodology

Quantitative Enzymatic

Performed

Sun-Sat

Reported

Within 24 hours

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation

Collect at 60 minutes post-glucose load.

Collect

Gray (sodium fluoride/potassium oxalate).

Specimen Preparation

Separate plasma from cells within 24 hours. Transport 1 mL plasma. (Min: 0.2 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions
Remarks
Stability

After separation from cells: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 1 year

Reference Interval

Values > 140 mg/dL constitute a positive screen.  Positive screens on pregnant patients should be followed by a diagnostic three-hour oral glucose tolerance test (Glucose Tolerance Test, Pregnancy 0020543).

Interpretive Data



No compliance statements are in use for this test.

Note

Administer 50 g glucola. Do not mix with water unless directions on product label indicate to do so. The patient does not need to be fasting for the screen. During the test period, the patient should remain inactive and receive nothing by mouth (including tobacco); a small sip of water or ice is permissible. Reasons for invalid results include emesis and conditions that delay stomach emptying.

Hotline History
N/A
CPT Codes

82950

Components
Component Test Code* Component Chart Name LOINC
0020047 Glucose Screen, Pregnancy 1504-0
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Aliases
  • Blood Glucose
  • Blood Sugar
  • GLU
  • GTT
  • OGTT
  • Oral Glucose Tolerance Test
Glucose Screen, Pregnancy