Carotene [311]

For Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.

Test Code

Alias/See Also

CPT Codes

Preferred Specimen
2 mL serum - protected from light

Patient Preparation
Overnight fasting is required

Minimum Volume
0.7 mL

Separate from cells as soon as possible after clotting. Send serum in an amber tube. If amber tube is not available, wrap tube in aluminum foil to protect from light.

Transport Container
Plastic screw-cap vial, protected from light

Transport Temperature
Refrigerated (cold packs)

Specimen Stability
Room temperature: 72 hours
Refrigerated: 7 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Room temperature • Not protected from light (room temperature and refrigerated)

High Performance Liquid Chromatography (HPLC)

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule
Set up: Mon-Sat a.m.; Report available: 3 days

Reference Range
0-8 months Not established
9 months-6 years 5-80 mcg/dL
7-17 years 9-190 mcg/dL
Males ≥18 years 4-51 mcg/dL
Females ≥18 years 6-77 mcg/dL

Clinical Significance
Beta Carotene, a fat soluble nutrient, is a precursor to vitamin A. Deficiencies may lead to vitamin A deficiency. Excessive vitamin A intake may lead to headaches, loss of appetite, nausea and diarrhea, skin changes, and potential birth defects.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

Last Updated: November 24, 2021

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.