Methodology
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Synonyms
Glucose tetrasaccharides; Glc4; Hexose tetrasaccharide; Hex4
Specimen Type
Urine, Random
Performing Lab
Mayo Medical Lab
Epic ID
Other Reference Test
Lab Test Days
Wednesday
Standard TAT
4-10 Days
Collection Information
Specimen Required
1-3 mL Random Urine (no preservative)
Container Type
Sterile Container
Processing Information - Lab Use Only
Transport Temperature
Refrigerate-OK/Frozen-OK/Ambient-OK
Specimen Stability
Room Temp: 14 Days; Refrigerated: 28 Days; Frozen: 87 Days (preferred)
Test Volume Required
3 mL Random Urine
Minimum Test Volume
1 mL Random Urine
Processing Instructions
Order in Mayolink and send with Mayo courier Monday-Friday. If ordered as a NBS-Follow Up from Metabolic Clinic, DO NOT order in Mayolink and submit sample with manual requisition from provided by the Metabolic Coordinators on the CDPH account.
CPT Codes
82542, 82570 (not genetic)
Revised
5/9/26
Initials
IM