Glucose

Test Code

38451

CPT Codes
82947<br>Limited Access Code

Preferred Specimen

1 mL serum collected in a serum separator tube (SST)

Patient Preparation
Fasting required. Fasting is defined as no consumption of food or beverage other than water for at least 8 hours before testing.

Minimum Volume

0.5 mL

Other Acceptable Specimens

Plasma collected in sodium heparin (green-top) tube, or lithium heparin (green-top) tube, or plasma separator tube (PST), or fluoride oxalate (gray-top) tube • Whole blood collected in fluoride oxalate (gray-top) tube

Instructions

Serum and plasma submissions must be separated from cells.

Transport Temperature

Room temperature

Specimen Stability

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

Plasma
Room temperature: 7 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 or plasma separator tube (SST® or PST); Red-top or green-top tube (serum or heparinized plasma not separated from cells); Anticoagulants other than lithium heparin, sodium heparin or fluoride/oxalate

Methodology
Spectrophotometric

Setup Schedule

Set up: Daily; Report available: Next day

Reference Range

65-99 mg/dL

Clinical Significance

Serum glucose levels may be abnormally high(hyperglycemia) or abnormally low(hypoglycemia). Glucose measurements are used in the diagnosis and treatment of carbohydrate metabolic disorder, including diabetes mellitus, idiopathic hypoglycemia, and pancreatic islet cell neoplasm.

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.