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Prior Authorization Required*
*If prior authorization is not submitted, test may be delayed.
Test Overview
Test Methodology

All coding exons (plus 15 bp upstream and downstream of each coding exon) of the targeted gene(s) are captured, sequenced using NGS and aligned to the human reference genome. A minimum NGS coverage of 20X is achieved for all coding exons +/- 5 bp, and a minimum coverage of 10X an additional 10 bp from +/- 6 bp through +/- 15 bp. A minimum coverage of 10X is achieved for all clinically significant promoter regions. Regions which do not meet these coverage metrics are filled with targeted Sanger Sequencing. Variants in the targeted regions that are of potential clinical significance, based on the ACMG guidelines for interpretation of sequence variants (PMID: 25741868), will be reported. All reported variants of potential clinical significance not meeting the sequencing quality criteria will be confirmed by a different technology. Copy number variation is assessed by coverage depth within the targeted regions compared to a normalized reference file. Copy number variants of potential clinical significance will be reported following confirmation by a different technology.

Test Usage

Analysis for the presence of ATP7B mutations in patients with characteristics of Wilson disease: jaundice, autoimmune-type hepatitis, fulminant hepatic failure, chronic liver disease, movement disorders, rigid dystonia, depression, neurotic behaviors, and intellectual deterioration.

Reference Range *

Interpretive report provided.

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

Test Limitations

This analysis will not identify variants in the regulatory elements or deep intronic regions of the targeted gene(s) or other regions of the genome that are not included in this test. This assay may not detect large insertion/deletion, small copy number loss/gain, or balanced inversion/translocations involving the targeted gene(s). Variant classification reflects the current state of scientific understanding at the time of test completion. As new scientific data becomes available, the interpretation and classification of variants identified in this assay may change. Test interpretation may be impacted by the presence of a hematologic malignancy or an allogenic bone marrow transplant.

Test Details
Days Set Up
Monday - Friday
Analytic Time

28 days

Soft Order Code
MiChart Code
ATP7B Gene Sequencing
  • ATP7BS
  • ATP7B Gene Seq Shadow
  • ATP7B
  • ATP7B Gene Sequencing
  • Wilson's Disease
MMGL Molecular Genetics
Specimen Requirements
Collection Instructions

Collect specimen in a lavender top tube. Send intact specimen within 24 hours if stored at room temperature or within 5 days if stored refrigerated. Include the patient's family history, pedigree, and ethnicity on the test requisition. Obtaining informed consent from the patient prior to genetic testing is strongly recommended. If desired, a UMHS Request and Consent for Genetic Testing form can be obtained from the MMGL Molecular Genetics Laboratory by contacting the MLabs Client Services Center at 800-862-7284 or online at

Normal Volume
6 mL EDTA whole blood
Minimum Volume
2 mL EDTA whole blood
Additional Information

By ordering this test the clinician acknowledges that informed consent has been obtained from the patient as required by applicable state or federal laws and the ordering clinician has authorization from the patient permitting MLabs to report the test results to the ordering clinician. Test includes medical geneticist interpretation of results billed as a separate additional charge. This test is not available without interpretation.

CPT Code
Fee Code
Pro Fee CPT