Methodology
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Synonyms
Galactosemia
Specimen Type
Whole Blood
Performing Lab
Mayo Medical Lab
Epic ID
LAB09236
Lab Test Days
Thursday
Standard TAT
4-10 Days
Collection Information
Specimen Required
2-3 mL Whole Blood
Container Type
Lavender (EDTA)
Collection Instructions
Collect Monday-Thursday and Friday before 1200 only, not on weekends. Whole blood collected in a sodium heparin (green-top) tube is also acceptable. Specimens collected following a meal can exhibit postprandial elevations. For infants, collect a specimen immediately prior to feeding to avoid this.
Processing Information - Lab Use Only
Transport Temperature
Refrigerate-Only
Specimen Stability
Room Temp: Unacceptable; Refrigerated: 72 Hours; Frozen: Unacceptable
Rejection Criteria
Gross hemolysis
Test Volume Required
3 mL Whole Blood
Minimum Test Volume
2 mL Whole Blood
Processing Instructions
Collect Monday-Thursday and Friday before 1200 only, not on weekends. Order in Mayolink and send with Mayo courier Monday-Friday. Must be received at Mayo within 72 hours.
CPT Codes
84378
Revised
7/8/25
Initials
SA