General Information

UPHSM LIS Test #: 659
Testing Time: 3 - 5 Days
Testing Lab: Labcorp

Specimen Info
Only 1 specimen type required, unless otherwise specified

Volume: 0.8mL (0.4mL minimum) serum
Temperature: Refrigerated
Tube Type: 1 Red-Top or Gel-Barrier Tube
Collection Info:
If a red top is used, transfer separated serum to a plastic transport tube.

Special Instructions:  Patient should fast for 12 hours and abstain from alcohol for 24 hours prior to collection. For those who are younger than six months, draw prior to next feeding. Blood should be collected before breakfast in the morning and prior to any medication.

Causes for Rejection:  Sample type other than serum received.


Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

Clinical Utilities

Differential diagnosis of hypervitaminosis A. A combination of a low serum carotene level and a low vitamin A suggests inadequate vitamin A nutrition.

CPT Codes


* The CPT codes provided 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 payer being billed.