Stepwise, Part 2 (NY)

Test Code

16466

CPT Codes
81511<br><strong>This test code is for New York patient testing. For non-New York patient testing, use test code 16465.</strong>

Includes

AFP, Unconjugated Estriol, hCG, Dimeric Inhibin A, *PAPP-A and hCG from Stepwise, Part 1; Interpretation

Preferred Specimen

3 mL serum

Minimum Volume

1 mL

Instructions

Collect between 14.0 weeks to 22 6/7 weeks.
Mother's date of birth (mm/dd/yy), Estimated Date of Delivery by US/LMP/PE, weight, race, insulin-dependent diabetes status, repeat sample (Y/N), number of fetuses, and neural tube defect history must be provided for interpretation of results.
Must complete all patient demographic information using the appropriate questions from the entry fields in the regular requisition.

Transport Container

Plastic screw-cap vial

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Grossly lipemic

Methodology
Chemiluminescence (CL) • Immunoassay (IA)

FDA Status
PAPP-A: This test was performed using a kit that has not been cleared or approved by the FDA. The analytical performance characteristics of this test have been determined by Quest Diagnostics. This test should not be used for diagnosis without confirmation by other medically established means.

Setup Schedule

Set up: Mon-Sat; Report available: 4-6 days

Reference Range

MSS Down Syndrome Risk	<1:270
Risk for Trisomy 18	<1:100
AFP MoM	<2.50
IDD	<1.90
TWINS	<4.00
TWINS IDD	<3.50
TRIPLETS	<4.50

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.