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Test Catalog
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SCN4A DNA Sequencing test |
#146 |
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| Type of Disorder: |
Neuromuscular Disorders |
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| Typical Presentation: |
Adults may present with myotonia due to cold, exercise, normal or abnormal serum potassium levels. |
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| Indications for Testing: |
Proximal and/or distal stiffness or weakness. Non-dystrophyic, non-syndromic myotonia with mild hypertrophy. Dystrophic but non-syndromic myotonia for differential. |
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| Disease(s) tested for: |
Sodium Channel Myotonia |
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| Test Details |
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| Test Code: |
146 |
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| Profiles that contain this test: |
Complete Myotonia Evaluation, Early Onset Myotonia Evaluation
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| Informed Consent Required: |
Yes |
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| Medicare ABN Required: |
Yes |
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| Technical Information |
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| Utility: |
Detects point mutations in the SCN4A gene |
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| Methodology: |
DNA Sequencing |
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| Reference Value: |
No mutation detected |
| CPT Coding |
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The CPT codes provided are based on AMA guidelines
and are for informational purposes only. CPT coding
is the sole responsibility of the billing party.
Please direct any questions regarding coding to
the payer being billed.
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| Stacked CPT Code(s): |
83891(1), 83898(27), 83904(27), 83909(27), 83912(1) |
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| Shipping Considerations |
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| Please label each specimen tube with two forms of patient identification. These forms of identification must also appear on the requisition form. |
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| Preferred Specimen Requirements |
| Type: |
Whole blood |
| Minimum Volume: |
10 ml |
| Collection Tube: |
Lavender top (EDTA) |
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| Storage Conditions: |
Refrigerate |
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| Shipping Conditions: |
Room temperature, avoid freezing |
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| Test Turnaround: |
21-28 days |
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