Ordering a prenatal Test

All tests offered by CTGT can be performed on prenatal specimens, including Nextgen sequencing, Sanger sequencing and deletion/duplication tests. CTGT does not perform pre-implantation genetic diagnosis (PGD) on embryonic specimens. Clients are encouraged to contact us with any questions about ordering a prenatal test.

Specimen requirements

CTGT prefers ONE of the following types of prenatal specimens:

  1. Prenatal cultured cells: Two confluent T-25 flasks derived from amnio or CVS samples.  Please fill all flasks to capacity with cell culture media before sending. CTGT highly recommends the sender retain additional cell cultures until testing is completed. 
  2. Prenatal genomic DNA: a minimum of 3 µg at a concentration of at least 30 ng/µl, preferably in TE solution

Maternal cell contamination (MCC) studies

CTGT highly recommends including a maternal sample for MCC studies with all prenatal tests. The maternal sample can be either whole blood in a purple-top (EDTA) tube or genomic DNA (a minimum of 3 µg). The maternal sample may be shipped to CTGT separately if the fetal sample is not ready to be sent. 
Test code Test Price CPT Code
1389         Maternal cell contamination testing $370          81265 X 1 

Turnaround time (TAT)

CTGT attempts to expedite all testing involving ongoing pregnancies. Our standard turnaround time for Sanger sequencing is approximately 1-2 weeks, for deletion/duplication tests approximately 2-3 weeks and approximately 2-4 weeks for NextGen sequencing.

Requisition form

CTGT does not provide a separate requisition form for prenatal cases. Please complete the “Other Information” section on the last page of our requisition form and indicate that the sample is a prenatal specimen.


Prenatal specimens should be packed in materials that prevent the containers from being damaged during shipment. Specimen containers should be labeled with patient name and date of birth. Specimens sent without patient identifiers will not be accepted by CTGT. Prenatal and maternal specimens should be shipped at ambient temperature using an overnight delivery service. A complete requisition form, including payment information, must be sent with the specimens.

The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. HNL Lab Medicine strongly recommends confirmation of CPT codes with third-party payors and/or the AMA. We assume no responsibility for billing errors due to reliance upon CPT codes provided by HNL Lab Medicine.

What's New

April 11, 2022

Genome Sequencing: A Vital Tool Used in Identifying and Tracking New COVID-19 Variants

Genome sequencing is reading or decoding the complete genetic information i.e. “Genome” of an organism that is encrypted in the form of a very long string called DNA made up of 4 letters, A, T, G, and C. The genome of an organism essentially determines their physical characteristics and ...
Read More
March 03, 2022

The Effect of Genetics on Individual Heart Health: Early Identification of FH Variations to Optimize Treatment

Test must be ordered by a Physician.

Familial hypercholesterolemia (FH) is a genetic disorder that is characterized by abnormally high blood levels of low-density lipoprotein (LDL) cholesterol, sometimes referred to as "bad cholesterol". This condition affects an estimated 1 in 250 people, and increases the likelihood of developing cardiovascular disease. In fact, FH is estimated to be the cause of 2-3% of heart attacks in individuals younger than age 60.

Read More
October 13, 2021

CTGT.net: A New Website Experience

We've refreshed our look and feel to better meet your needs. 

CTGT's new website is not only user-friendly but also provides more advanced test search capabilities, additional methodologies, and a clean design suited for multi-platform usage.

Read More
September 28, 2021

9 New Tests for Genetic Carrier Screening Panels

CTGT is now offering 9 NEW tests for Genetic Carrier Screening. 
Read More
September 25, 2021

New York State Clinical Laboratory Permit Approval

CTGT is proud to announce that its CLIA licensed and CAP-accredited Pennsylvania laboratory has earned a New York State Department of Health clinical laboratory permit to perform genetic testing for patients residing within the state of New York. 
Read More