Lactose Tolerance Test

Orderable EAP code:

LAB00123

Billable EAP Codes:

80001745 x 1 (Fasting)
80001749 x 1 (45 Minute)
80001748 x 1 (60 Minute)
80001750 x 1 (90 Minute)

CPT Codes:

82951 x 1
82952 x 3

Lab Section:

Core Lab

Turnaround Time:

Routine: 2 Hours
Urgent: 1 Hour

Test Schedule:

24 hours, 7 days a week.

Units:

mg/dL

Specimen Requirements:

2 mL blood in a GRAY top vacutainer.

Pediatric Specimen Requirements:

1 mL blood in a GRAY top vacutainer.

Reference Range:

See comments.

Comments:

Used in the diagnosis of small bowel lactase deficiency. Glucose Tolerance Test should be run the day before Lactose Tolerance to be sure that glucose is absorbed properly. Patient must be fasting before Lactose Tolerance Test. Administer 50 g of lactose orally for an adult. Draw blood samples at 0, 15, 30, 45, 60 and 90 minutes. Lactase deficient individuals show blood sugar levels that rise not more than 20 mg/dL over the fasting level.

Synonyms:

GGT, Lactose Intolerance, Glucose Tolerance