Posted Date
Effective Date
Update Type
New Tests
CPT Code
84425
Order Code
VITB1
NEW TEST
Thiamine (Vitamin B1), Whole Blood
Order Code: VITB1
Fee Code: KA061 (CPT 84425)
LOINC: 32554-8
The MLabs Toxicology Laboratory will begin offering Thiamine (Vitamin B1), Whole Blood, by Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS). This test will replace order code TDP currently sent to Mayo Clinic Laboratories (test ID TDP).
Collection Instructions: Collect specimen in a lavender top (EDTA) tube following an overnight (12-14 hour) fast. Invert 8-10 times to mix, pour whole blood into a plastic vial, and freeze within 24 hours of collection. Protect specimen from light.
Reference Range: 70 – 180 nmol/L
