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Test Code 1647 D-Xylose, Blood, Fasting

Specimen Containers and Fixatives

Gray Top Tube (Sodium Fluoride)

Specimen Required

NorthShore Lab Services: submit 4.0 mL (1.0 min) blood.

Hospital setting: submit 4.0 mL (1.0 min) blood.

Day(s) and Time(s) Performed

Monday – Friday, 5 days

Reference Values

See written report from Reference Laboratory.

Method Name

Spectrophotometry

CPT Code Information

84620

LOINC Code Information

41189-2

Fasting

Patient should be kept fasting overnight (4 hours for infants) before and during the test period.