93638 Maternal Screen #1

Specimen:

Collect:

One 7.5 mL SST

Also Acceptable
One 10 mL Red Top

Submit:

0.5 mL (Min:0.3 mL) Serum. Submit Refrigerated. Submit in a Standard Transport Tube.

Special Handling:

Specimen must be drawn between 10 weeks, 3 days and 13 weeks, 6 days gestation (Crown-Rump length (CRL) must be 3.6-8.5 cm).
Requires complete gestational information including CRL.
This test also requires the following information: a crown-rump length measurement (cm), ultrasonographer's name and certification number, date of ultrasound, patient's date of birth, current weight, due date, number of fetuses present, patient's race, if the patient requires insulin, if there is a known family history of neural tube defects, if the patient has had a previous pregnancy with a chromosome abnormality, if the patient is taking valproic acid or carbamazepine (Tegretol), physician's name and phone number; and for in vitro fertilization pregnancies, the age of the egg donor.

Rejection Criteria:

Hemolyzed specimens
Heparin, EDTA and Citrate plasma
Specimens exposed to repeat freeze/thaw cycles

Stability:

Ambient: 2 Day(s); Refrigerated: 2 Week(s); Frozen: 1 Month(s); Incubated: Unacceptable

Methodology:

Quantitative Chemiluminescent Immunoassay

Performed:

Sun-Sat

Reported:

3-5 Day(s)
Final interpretative report available when second specimen testing is complete.

CPT Codes:

84163