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Quad Screen Maternal, Serum

(Includes: Maternal AFP, HCG, Estriol, Inhibin A)

Tube Type

Test ID   LAB11105
EPIC Order   QUAD SCREEN MATERNAL, SERUM
CPT Code(s)   81511
Group/Individual Test   Group
Laboratory   Core Referral Testing
Tube Station   30
Specimen Routine: 5 mL blood/Gold SST/Red plain also acceptable; See Comments
  Micro:
 2.5 mL blood
Availability Routine: Reference Laboratory - Mayo Clinic Laboratories
Turnaround Time   4-6 days
Reference Range   See separate report.
Comments
  • For an assessment that includes neural tube defect results, sample MUST be collected between 15 weeks, 0 days and 22 weeks, 6 days gestation.
  • Assessments for trisomy 21 and trisomy 18, sample must be collected between 14 weeks, 0 days and 22 weeks, 6 days gestation. 

Reviewed by J. Carr on October 31, 2025

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514