Days Set Up
Analytic Time

6 - 12 days

MiChart Code
Soft Order Code

Test Updated:


Carbohydrate Def Transferrin
Mono-oligo/Di-oligo Ratio
Mono-oligosaccharide/Di-oligosaccharide transferrin ratio

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Test Overview

Test Methodology

Affinity Chromatography / Mass Spectrometry

Test Usage

Evaluation of alcohol abuse. Carbohydrate Deficient Transferrin (CDT) testing alone is not recommended for general screening for alcoholism. The transferrin isoform pattern in patients with chronic alcoholism is similar, although not as strikingly abnormal to that observed in Congenital Disorders of Glycosylation (CDG). Conditions such as hereditary fructose intolerance, galactosemia, and other genetic or non-genetic causes of liver disease may also result in increased levels of CDT.

Reference Range

Mono-oligo/Di-oligo Ratio < or = 0.10

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

Specimen Requirements

Collection Onsite

Collect specimen in red top or SST tube.

Collection Offsite

Collect specimen in red top or SST tube. Centrifuge, aliquot serum into a plastic vial and freeze.

Yellow Top Tube
Normal Volume
0.5 mL serum
Minimum Volume
0.1 mL serum

Billing Information

CPT Code
Pro Fee Code

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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.