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.

Test Details
Days Set Up
Monday
Analytic Time

7 - 14 days

Soft Order Code
HUNTD
MiChart Code
Huntington Disease Mutation Genetics, Screening (Sendout)
Laboratory
Sendout
Reference Laboratory
Fairview Diagnostic Laboratories
Section
Special Testing
Specimen Requirements
Collection Instructions

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.

Normal Volume
10 mL ACD (preferred) or EDTA whole blood
Minimum Volume
2 mL ACD (preferred) or EDTA whole blood
Additional Information

Test sent to Fairview Diagnostic Laboratories.

Billing
CPT Code
81401
Fee Code
22005
LOINC
21763-8
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