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Lab Test Dictionary

Disaccharidases (19701)


Spectrophotometry (SP)

Specimen Type


Performing Lab

Quest Diagnostics Valencia

Epic ID


Lab Test Days


Standard TAT

3-5 Days

Collection Information

Specimen Required

2-5 mg frozen small bowel biopsy collected in a 2 mL cryovial polypropylene screw-cap tube

Container Type

Sterile Container

Collection Instructions

Place 5 mg (2 mg) small bowel biopsy on the interior surface of a 2 mL polypropylene screw-cap cryovial or small polypropylene collection tube. Freeze within 2 hours of collection at -20?C.

Processing Information - Lab Use Only

Transport Temperature


Specimen Stability

Room Temp: Unacceptable; Refrigerated:Unacceptable; Frozen: 31 Days

Rejection Criteria

Received room temperature; Received refrigerated; Samples frozen later than 2 hours post-collection; Samples received in urine containers; Samples in colorless fluid (water, formalin, saline); Samples on gauze, filter paper or any support media

Test Volume Required

5 mg Biopsy

Minimum Test Volume

2 mg Biopsy

Included Tests

Lactase, Sucrase, Maltase, and Palatinase


Lactase, maltase, palatinase and sucrase are mucosal disaccharidases that are present in normal small intestine and fetal colon. A decrease in the enzyme activity of these disaccharidases has been noted in colonic adenomas, adenocarcinomas and malabsorption. Decreased disaccharidase activity is a good indication of mucosal injury with the exception of lactase.

CPT Codes

82657 (x4)