Glucose, PP 2-Hour (75 grams) [5722X]

Test Code

148322

CPT Codes
82950

Preferred Specimen

1 mL timed plasma collected in a fluoride oxalate (gray-top) tube

Patient Preparation
The patient is given a 75 gram dose of glucose and a single blood specimen is obtained 2 hours later

Minimum Volume

0.5 mL

Other Acceptable Specimens

Timed plasma collected in a sodium or lithium heparin (green-top) tube • Timed serum collected in a serum separator tube • Timed whole blood (Minimum 1 full tube) collected in fluoride oxalate (gray-top) tube

Instructions

Serum and plasma submissions must be separated from cells

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Fluoride/oxalate plasma
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days

Heparinized plasma
Room temperature: 48 hours
Refrigerated: 7 days
Frozen: 28 days

Serum
Room temperature: 4 days
Refrigerated: 7 days
Frozen: 28 days

Whole blood
Room temperature: 24 hours
Refrigerated: 72 hours
Frozen: Unacceptable

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

Unspun serum separator tube, red-top or non-plasma separator green top tubes • Anticoagulants other than lithium heparin, sodium heparin or fluoride/oxalate

Methodology
Spectrophotometry (SP)

Setup Schedule

Set up: Daily; Report available: Next day

Reference Range

<140 mg/dL

Clinical Significance

This test is used for the routine diagnosis of diabetes. A 75g glucose load is administered to the patient in place of a meal. If results are positive, and the patient is pregnant, a 3 hour oral glucose tolerance test should be performed for confirmation of gestational diabetes.

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.