Vitamin A (Retinol)

Test code

921

CPT code(s)*

84590

**CPT Code is subject to a Medicare Limited Coverage Policy and may require a signed ABN when ordering.

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Not offered in Quest Diagnostics Nichols Institute (IFD) – San Juan Capistrano. Please provide Service Area Information to find available tests you can order.

In-home collection may be available in your area for purchase through Quest Mobile.

Clinical significance

Vitamin A (Retinol) - 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.

Test resources

None found for this test
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Details

Test details

Methodology

Chromatography

Assay category

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.

Alternative name(s)

Retinol

Specimen requirements
Patient preparation	Overnight fasting is required
Preferred specimen(s)	2 mL serum protected from light
Alternative specimen(s)	Foil wrapped transport tube protected from light
Minimum volume	0.7 mL
Collection 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.
Transport container	Amber transport tube
Transport temperature	Refrigerated (cold packs)
Specimen stability	Room temperature: 24 hours Refrigerated: 7 days Frozen: 28 days
Reject criteria	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

Reference range(s)

Reference Range(s)

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

LOINC® codes

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Service Area Information

Performing lab & setup schedule

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Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

*The CPT codes provided are based on AMA guidance 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.

This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.

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