Epic Code LAB1231944 UGT1A1 Gene Polymorphism (TA repeat)

Test Name Alias

LAB1231226 | UGT1A1 | Quest: 17813 | UDP Glucuronosyltransferase 1A1 Genotyping, Gilberts, Irinotecan, UGT1A1 Genotyping

Interface Order Alias

1231944

Clinical Information

UGT1A1 Gene Polymorphism (TA Repeat) - This test is intended to identify patients who may have Gilbert syndrome and those who are at increased risk for Irinotecan toxicity.

Specimen Requirements

Specimen Collection Criteria

Collect (preferred specimen): One Lavender-top EDTA.

Also acceptable: One Pink-Top(EDTA)

Physician Office/Draw Specimen Preparation

Do not centrifuge. Maintain whole blood in original collection tubes, at room temperature (20-26°C or 68-78.8°F)

In-Lab Processing

Do not centrifuge. Maintain whole blood in original collection tubes, room temperature (20-26°C or 68-78.8°F)

Specimen Transport Temperature

Transport: 5.0 mL whole blood, room temperature (20-26°C or 68-78.8°F). (Minimum: 3.0 mL)

Rejection Criteria

Gross hemolysis
Lipemic specimens.
Clotted specimens
Specimens not collected and processed as indicated.

Specimen Stability

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 8 days
Refrigerated (2-8°C or 36-46°F): 8 days
Frozen (-20°C/-4°F or below): Unacceptable

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Test Frequency

Performed: Monday, Thursday.
Results available in 6-10 days.

Reference Range

By report.

Performing Department

Send Outs

Performing Department Laboratory Location

Sent to Quest Diagnostics- Wood Dale, IL

Methodology

Fluorescent Polymerase Chain Reaction

CPT

81350

LOINC

Unavailable

Reviewed Date

11/3/2025

Orderable Regions