d-Xylose Absorption Test, Blood, Fasting

Message

For Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.

Test Code

XYLOSE

Alias/See Also

14727, 1198X

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

Methodology
Colorimetry (C)

Setup Schedule

Set up: Mon, Thurs; Report available: 1-3 days

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

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.