Vitamin A (Retinol)

Message

MUST BE DRAWN AT THE MAIN LAB CHOMP
Protect from light

Test Code

LAB580

Quest Code

921

CPT Codes
84590

Preferred Specimen

2 mL serum protected from light

Patient Preparation
Overnight fasting is required

Minimum Volume

0.7 mL

Instructions

Allow blood to clot at room temperature for 30 minutes. Centrifuge to separate serum from the cells within 24 hours of collection and immediately pour serum into a plastic transport tube.
Send serum in an amber tube. If amber tube is not available, wrap tube in aluminum foil to protect 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?)

Gross hemolysis • Grossly lipemic sera • Serum unseparated from the clot • Serum in serum separator tube (SST) not separated from the gel • Received room temperature • Not light protected • Plasma

Methodology
Chromatography

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 FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

Set up: Mon-Sat; Report Available: 3 days

Limitations

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
MedFusion
2501 South State Highway 121 Suite 1100
Lewisville, TX 75067-8188

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.