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Lactose Tolerance

Order Name LACTOS TOL
Test Number: 2003300
Revision Date 05/28/2021
Test Name Methodology LOINC Code
Lactose Fasting
Colorimetric 2552-8 
Lactose 0.5 Hour Tolerance
Colorimetric 1584-2 
Lactose 1 Hour Tolerance
Colorimetric 1582-6 
Lactose 2 Hour Tolerance
Colorimetric 1583-4 
Lactose 3 Hour Tolerance
Colorimetric 19249-2 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred See Instructions Plasma Sodium Floride (Gray) See Instructions
Instructions 1mL (0.5) Plasma Sodium Floride (Gray) for each time of collection.
Call Laboratory at (918) 744-2500 for instructions. Patient must be fasting overnight and during test. 50 grams of lactose is administered following an overnight fast. Specimen stability: Ambient 8 hours. Refrigerated 7 days, Frozen 3 months.
GENERAL INFORMATION
Testing Schedule Mon - Fri 
Expected TAT 1-2 days  
Clinical Use Used to determine primary lactose intolerance due to decrease synthesis of lactase, or secondary to any disease characterized by diffuse damage to the intestinal epithelium. 
CPT Code(s) 82951; 82952X2
Lab Section Chemistry