TRPC6 DNA Sequencing Test

Test Code
92945


CPT Codes
81406<br /> Limited Access Code

Physician Attestation of Informed Consent
This germline genetic test requires physician attestation that patient consent has been received if ordering medical facility is located in AK, DE, FL, GA, IA, MA, MN, NV, NJ, NY, OR, SD or VT or test is performed in MA.


Preferred Specimen
8 mL whole blood collected in two EDTA (lavender-top) tubes
Pediatric (0-3 years): 2 mL


Minimum Volume
6 mL • 1 mL pediatric


Instructions
Informed consent required

Please label each specimen tube with two forms of patient identification. These forms of identification must also appear on the requisition form.

Higher blood volumes ensure adequate DNA quantity, which varies with WBC, specimen condition, and need for confirmatory testing. Patients, 0-3 years have higher WBC, yielding more DNA per mL of blood.

Shipping Conditions: Ship room temperature, avoid freezing


Transport Temperature
Room temperature


Specimen Stability
Room temperature: 10 days
Refrigerated: 10 days
Frozen: Unacceptable


Methodology
Sanger Sequencing

FDA Status
This test was developed and its analytical performance characteristics have been determined by Athena Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule
Set up: Varies; Report available: 14-28 days


Reference Range
No sequence variation detected


Clinical Significance
Disease(s) tested for: Focal segmental glomerulosclerosis

Detects sequence variants in the TRPC6 gene in patients with an autosomal dominant form of hereditary focal segmental glomerulosclerosis. Patients exhibit a high grade proteinuria by the third or fourth decade of life and end stage renal disease within 10 years in more than half of affected individuals.




The CPT Codes provided in this document 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 payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.