1 HOUR GESTATION DIABETES SCREEN

Message

This test does not require a baseline (fasting) sample. Draw specimen 1 hour after administering 50g oral glucose (Glucola), or dose specified by physician.

Test Code

GLPOB

Alias/See Also

GCT; Glucose; GTT; Post OB

CPT Codes
82950

Includes

1 glucose result (does not include a baseline result)

Preferred Specimen

1 Gold tube (gel separator)

Minimum Volume

0.5 mL

Other Acceptable Specimens

1 Lavender tube (EDTA) or
1 Green tube (Lithium Heparin) or
1 Gray tube (Sodium Fluoride)

Instructions

Separate serum or plasma from red cells rapidly to minimize the loss of glucose through glycolysis. Refrigerate until tested.

Transport Temperature

Refrigerate

Specimen Stability

2-8°C up to 3 days
15-30°C up to 24 hours (plasma)
15-30°C up to 8 hours (serum)

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Hemolyzed

Methodology

Hexokinase

Setup Schedule

M, T, W, Th, F, Sa, Sun

Report Available

Same day tested at the performing laboratory.

Reference Range

70 - 139 mg/dL

Clinical Significance

Establish the diagnosis of diabetes mellitus in the pregnant patient. This test is the initial screen in the two-step screening approach recommended by the American College of Obstetrics and Gynocology (ACOG).

Performed By
Alverno Laboratories

Performing Laboratory
Alverno Central Lab
NCHB1 (Chemistry, Beckman AU)

Last Updated: June 8, 2023

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.