Nephrogenic Diabetes Insipidus Evaluation

Test Code
901141


CPT Codes
81404 (x2)<br /> Restricted Client 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.


Includes
AQP2 (Nephrogenic Diabetes Insipidus) DNA Sequencing Test
Nephrogenic Diabetes Insipidus (AVPR2) DNA Sequencing Test


Preferred Specimen
10 mL whole blood aliquot in EDTA (lavender-top) tube


Minimum Volume
2 mL


Instructions
Informed consent is required.

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

Ship overnight at room temperature (specimen arrival must be less than 24 hrs after collection); ship Monday through Thursday only.

Note: Hemolysis may compromise DNA recovery and integrity after 48 hours


Transport Temperature
Room temperature (preferred) or Refrigerated (cold packs)


Specimen Stability

Room temperature: 72 hours
Refrigerated: 72 hours
Frozen: Unacceptable



Methodology
DNA Sequencing, Polymerase Chain Reaction

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


Reference Range
See Laboratory Report


Clinical Significance
Detects mutations (including point mutations, deletions, insertions, and rearrangements) in the coding sequences of AVPR2 and AQP2




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.