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UNIPARENTAL DISOMY (UPD)
Test Code470054
CPT Codes
81402
Preferred Specimen
"Whole blood or amniotic fluid
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Minimum Volume
3 mL whole blood or 5 mL amniotic fluid or amniocyte culture
Instructions
"A separate test request form must be completed for each family member for whom a specimen is submitted. The patient's name, age, and relevant clinical and family history should be included on the corresponding test request form. Please include chromosome pair to be studied. Blood specimens from both parents should be submitted, although a specimen from one parent may be sufficient in some cases.
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Transport Container
"Lavender-top (EDTA) tube, green-top (heparin) tube, yellow-top (ACD) tube, sterile plastic conical tube or two confluent T-25 flasks for fetal testing
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Transport Temperature
"Maintain specimen at room temperature. Do not freeze.
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Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
"Frozen specimen; hemolysis; improper container
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Methodology
"Analysis of VNTRs and AMPFLPs by polymerase chain reaction (PCR) and gel electrophoresis "
Limitations
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This procedure may be considered by Medicare and other carriers as investigational and, therefore, may not be payable as a covered benefit for patients.
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This procedure may be considered by Medicare and other carriers as investigational and, therefore, may not be payable as a covered benefit for patients.
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