Vitamin A (Retinol)

Test Code

CPT Codes

Preferred Specimen
2 mL serum

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
Amber tube, or foil wrapped plastic screw-cap vial (protected from light)

Transport Temperature
Refrigerated (cold packs)

Specimen Stability
Room temperature: 24 hours
Refrigerated: 7 days
Frozen: 28 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received room temperature • Not light Protected • Plasma • Contaminated • Grossly-hemolyzed or heavily-lipemic sera

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

Results may be elevated in women on oral contraceptives.

Reference Range
1-6 Years 20-43 mcg/dL
7-12 Years 26-49 mcg/dL
13-19 Years 26-72 mcg/dL
Adult 38-98 mcg/dL

Clinical Significance
Vitamin A is critical for vision, growth, and many cell functions. High concentrations of Vitamin A are seen with renal failure, but this is not associated with toxicity and excessive ingestion. High concentrations are associated with bone fractures. Low concentrations of Vitamin A are consistent with fat malabsorption and are rarely due to inadequate diet.

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

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.