QuestAssureD™ for Infants, 25-Hydroxyvitamin D

QuestAssureD™ for Infants, 25-Hydroxyvitamin D

Test Code

91935
82306
CPT Code is subject to a Medicare Limited Coverage Policy and may require a signed ABN when ordering.
91935
82306
CPT Code is subject to a Medicare Limited Coverage Policy and may require a signed ABN when ordering.
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

QuestAssureD™ for Infants, 25-Hydroxyvitamin D - While measurements of 25(OH)D provide a good index of circulating Vitamin D activity in patients not suffering from renal disease, for infants less than 3 years of age it is important to remove circulating levels of the inactive c3-epimer of Vitamin D from the sample so that total Vitamin D levels are not falsely elevated. Falsely elevated results could erroneously make the child appear to be within normal limits and result in potential under-treatment. Levels of c3-epimer in older children and adults are usually negligible and do not cause falsely elevated Vitamin D results.

This assay ...

Test Resources

Test FAQ

Vitamin D Testing

Test Details

Includes

  • Vitamin D, 25-OH, Total
  • Vitamin D, 25-OH, D3
  • Vitamin D, 25-OH, D2

Patient Preparation

Fasting specimens are preferred but not required

Methodology

Chromatography/Mass Spectrometry

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.

Reference Range(s)

Vitamin D, 25-OH, Total 30-100 ng/mL
Vitamin D, 25-OH, D3 Not established
Vitamin D, 25-OH, D2 Not established

Alternative Name(s)

VIT D, Infants

LOINC® Codes, Performing Laboratory

Service Area must be determined
Vitamin D, 25-OH, Total
Vitamin D, 25-OH, D3
Vitamin D, 25-OH, D2
Fasting specimens are preferred but not required

Methodology

Chromatography/Mass Spectrometry
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.

Reference Range(s)

Vitamin D, 25-OH, Total 30-100 ng/mL
Vitamin D, 25-OH, D3 Not established
Vitamin D, 25-OH, D2 Not established

Alternative Name(s)

VIT D, Infants
Service Area must be determined

Preferred Specimen(s)

0.5 mL serum

Minimum Volume

0.2 mL

Collection Instructions

Collect blood in a standard red-top serum Vacutainer® tube. Allow blood to clot at room temperature. Centrifuge and separate the serum from the cells immediately.
Alternatively, collect blood in a serum separator tube (SST) at room temperature, centrifuge and remove from the gel within 48 hours.

Transport Container

Transport tube

Transport Temperature

Room temperature

Specimen Stability

  • Room temperature: 7 days
  • Refrigerated: 7 days
  • Frozen: 28 days

Reject Criteria

Gross hemolysis • Grossly lipemic • Plasma • Serum not separated from serum separator tube (SST) • Serum not separated from gel or clot within 48 hours • Grossly icteric

Setup Schedule

Service Area must be determined
0.5 mL serum
0.2 mL
Collect blood in a standard red-top serum Vacutainer® tube. Allow blood to clot at room temperature. Centrifuge and separate the serum from the cells immediately.
Alternatively, collect blood in a serum separator tube (SST) at room temperature, centrifuge and remove from the gel within 48 hours.
Transport tube
Room temperature
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days
Gross hemolysis • Grossly lipemic • Plasma • Serum not separated from serum separator tube (SST) • Serum not separated from gel or clot within 48 hours • Grossly icteric
Service Area must be determined
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.
Test Details

Clinical Significance

Test Resources

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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