Micronutrient, Vitamin A (Retinol)

Test Code

10179

CPT Codes
84590

Preferred Specimen

2 mL serum - protected from light

Patient Preparation
Overnight fasting is required

Minimum Volume

0.7 mL

Instructions

Patients should be 18 years of age or greater.

Separate from cells within 24 hours after clotting. Send serum in an amber tube. If an amber tube is not available, wrap the tube in aluminum foil to protect from light.

Transport Container

Amber transport tube

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 • Received room temperature • Not protected from light • 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: 2-4 days

Reference Range

18-19 years	26-72 mcg/dL
>19 years	38-98 mcg/dL

Reference range not available for individuals <18 years for this micronutrient test.

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.

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.