Days Set Up
Monday - Friday
Analytic Time

2 - 6 days

MiChart Code
Vitamin B1, Whole Blood
Soft Order Code

Test Updated:


Thiamin (Vitamin B1), WB
B1, Whole Blood
Thiamine, Whole Blood

Looking to order a test?

We’ve provided helpful links to make ordering easy.

Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

Order Kits and Supplies

MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

Visit our provider FAQ and learn about common questions to ordering tests.

Test Overview

Test Methodology

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

Test Usage

Assessment of thiamin deficiency. Thiamin measurement is appropriate in patients with behavioral changes, eye signs, gait disturbances, delirium, and encephalopathy; or in patients with questionable nutritional status, especially those who appear at risk and who also are being given insulin for hyperglycemia.

Reference Range

70 - 180 nmol/L

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

Specimen Requirements

Collection Offsite

Collect specimen in a lavender top tube (EDTA) following an overnight (12 hour) fast. Invert 8-10 times to mix blood, pour whole blood into an plastic vial, and freeze. Protect specimen from light.DO NOT SPIN

Normal Volume
4 mL whole blood
Minimum Volume
0.5 mL whole blood

Billing Information

CPT Code
Pro Fee Code

Have More Questions?

Explore our helpful billing resources:

Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.