Test Overview
Test Methodology

LC/MS-MS

Reference Range *

>= 17 years old: 8-30 nmol/L

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Tuesday-Saturday
Analytic Time

6-10 days

Soft Order Code
PLVB1
MiChart Code
Thiamin, serum/plasma (Vit B1)
Synonyms
  • B1, Plasma or Serum
  • B1
  • Thiamine, Plasma or Serum
  • Thiamine
Laboratory
Sendout
Reference Laboratory
Quest Valencia 90353
Section
Special Testing
Specimen Requirements
Collection Instructions

Overnight fasting required. Collect specimen in a lavender top or red top tube. Centrifuge, aliquot plasma or serum into a plastic vial within 4 hours of collection and freeze. Protect specimen from light.

Special Handling

Protect specimen from light.

Normal Volume

2 mL plasma or serum

Minimum Volume

1 mL plasma or serum

Additional Information

Note that whole blood is recommended as the optimum specimen type for Vitamin B1 (thiamine) analysis because the biologically active form of thiamine is found in erythrocytes in the form of thiamin diphosphate (TDP), which is found in very low concentrations in plasma or serum. Test sent to Quest Diagnostics Nichols Institute of Valencia.

Billing
CPT Code
84425
Fee Code
32168
LOINC
2999-1
NY State Approved
No