Vitamin B1 (Thiamine), Blood, LC/MS/MS : 5042

Test Code
VITB1 or 5042

Alias/See Also
B1; Thiamine

CPT Codes
84425

Instructions
Overnight fasting is required.

Lavender (EDTA). Protect from light.

Transport Container
Protect from light within one hour of collection, and during storage and transport. Transfer 2 mL whole blood (Min: 1 mL) into an amber transport tube (preferrred) or protect the specimen tube from light with foil or place in an amber bag. If collected in a glass tube, the whole blood MUST be transferred to a plastic transport tube before freezing.

Transport Temperature
Frozen.

Specimen Stability
Ambient: 72 hours; Refrigerated: 5 days; Frozen: 35 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Not protected from light.

Methodology
Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

Setup Schedule
Monday - Saturday

Report Available
2-3 days (From receipt at performing laboratory)

Reference Range
Adults 78-185 nmol/L

Clinical Significance
Vitamin B1 is required for branched-chain amino acid and carbohydrate metabolism. Vitamin B1 deficiency is most often due to alcoholism or chronic illness. In the early stage, patients with vitamin B1 deficiency exhibit anorexia, irritability, apathy, and generalized weakness. Prolonged deficiency causes beriberi.

Performing Laboratory
Quest Diagnostics



The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.