d-Xylose Absorption Test, Blood, 2 Hour [7553X]

Test Code

147502

CPT Codes
84620

Preferred Specimen

4 mL whole blood collected in a sodium fluoride (gray-top) tube

Patient Preparation
For fasting test, patient should fast overnight before blood collection.

Minimum Volume

1 mL

Instructions

4 mL blood, drawn 2 hour post oral ingestion of d-Xylose. Label sample vial with patient's name and the time of collection post-dose (e.g., 2 hour, etc.).

Note: This test cannot be performed at a Patient Service Center because of the preparation step required for the d-Xylose solution.

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 7 days
Frozen: 30 days

Methodology
Colorimetry (C)

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, Thurs; Report available: 1-3 days

Reference Range

<6 years	>14.9 mg/dL
≥6 years	>19.9 mg/dL

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.