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| Test code: | 289 |
| Type of disorder: | Peripheral Neuropathy, Autoimmune |
| Disease(s) tested for: | Multifocal Motor Neuropathy |
| Genes Included: | PMP22, |
| Tests included: | Co-Asialo Autoantibody Test Co-GD1b Autoantibody Test Co-GM1 Autoantibody Test GD1a AutoantibodyTest PMP22 Duplication/Deletion Test |
| Informed Consent Required: | This test requires physician attestation that patient consent has been received |
| Clinical Significance: | Anti-GM1, anti-GD1a, anti-Asialo GM1, anti-GD1b antibodies, and PMP22 gene deletions are found in patients with slowly progressive, predominantly distal, asymmetric weakness with no sensory symptoms or signs. Weakness is sometimes present in one upper extremity in 80% of patients; muscle atrophy is common. |
| Methodology: | ELISA , Multiplex Ligation-dependent Probe Amplification (MLPA) |
| Reference Range: | See Laboratory Report |
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.
| CPT: | 81324(1), 83520(4) |
Please label each specimen tube with two forms of patient identification. These forms of identification must also appear on the requisition form.
| Specimen Type: | Serum and whole blood |
| Specimen Stability: | Serum- Room temperature: 3 days, Refrigerated: 21 days, Frozen: 4 months; Whole blood- Room temperature: 10 days, Refrigerated: 10 days, Frozen: Unacceptable, |
| Specimen Requirements: | Serum: 2 mL (0.5 mL minimum); Whole blood: 8 mL (6 mL minimum) |
| Instructions: | Serum must be separated from whole blood within 48 hours of collection. |
| Transport Temperature: | Refrigerated |
| Reject Criteria | Hemolyzed; icteric; lipemic |
| Set-up/Analytic Time: | 14-21 days |
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