Days Set Up
Analytic Time

7 - 14 days

MiChart Code
Huntington Disease Mutation Genetics, Screening (Sendout)
Soft Order Code

Test Updated:


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All specimens should be accompanied by a requisition.

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Test Overview

Test Methodology

Amplification of DNA to evaluate trinucleotide repeats.

Test Usage

To confirm the diagnosis of Huntington\'s disease or in the evaluation of related neurodegenerative disorders through the analysis of the allele size of the CAG repeat in the Huntington gene.

Reference Range

Normal (10-26 repeats), premutation (27-35 repeats) or affected (36 repeats or greater). Interpretive report provided.

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

Specimen Requirements

Collection Offsite

Collect specimen in a yellow top (ACD) solution A (preferred) or lavender top tube. Send intact specimen refrigerated. Specimen must be accompanied by patient consent form available from MLabs. Both symptomatic and presymptomatic testing requires a signed informed consent form. Patient must be at least 18 years of age.

ACD Solution A
Lavender Top Tube
Normal Volume
10 mL ACD (preferred) or EDTA whole blood
Minimum Volume
2 mL ACD (preferred) or EDTA whole blood

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.