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d-Xylose Absorption Test, Blood, Fasting [1198X]
Test CodeDXYLSRS
Quest Code
14727
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
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 30 days
Refrigerated: 7 days
Frozen: 30 days
Methodology
Colorimetry (C)
Setup Schedule
Set up: Mon, Thurs; Report available: 1-3 days
Reference Range
Accompanies report
Clinical Significance
The Xylose Absorption Test is useful in screening for carbohydrate malabsorption.
Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153
Last Updated: November 10, 2015