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Quad Screen Maternal
Message Do not collect specimen after amniocentesis as this could affect resultsCollect a full tube, following standard venipuncture techniques.
Test Code
LAB9189 QUAD
Alias/See Also
QUAD
CPT Codes
81511
Includes
For an assessment that includes neural tube defect results, gestational age must be between 15 weeks, 0 days and 22 weeks, 6 days.Assessments for trisomy 21 (Down syndrome) and trisomy 18 (Edwards syndrome) only are available between 14 weeks, 0 days and 22 weeks, 6 days.Initial or repeat testing is determined in the laboratory at the time of report and will be reported accordingly. To be considered a repeat test for the patient, the testing must be within the same pregnancy and trimester, with interpretable results for the same tests, and both tests performed at Mayo Clinic.@BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@
Instructions
Processing Instructions (Lab use only): Centrifuge and aliquot serum into plastic vial within 2 hours of collection Minimum Testing Volume: 0.75 mL Serum Transport Temperature: Refrigerated Stability: Ambient: 7 daysRefrigerated : 7 daysFrozen: 90 days Causes for Rejection: Gross hemolysis
Report Available
7-Days
Clinical Significance
1230170151
Last Updated: May 18, 2026