Buccal swab requirements

Buccal swab collection and shipping instructions


Buccal swabs are not accepted for GenomeXpress, GenomeSeqDx, and Congenital Sideroblastic Anemia tests. Multiple permitted tests can be ordered on one swab but the DNA yield is limited and additional specimens may be needed to complete testing. For more information email support@genedx.com.

Buccal swabs are not accepted if the patient has ever received an allogeneic bone marrow/stem cell transplant due to the potential for a high percentage of donor DNA to be present. For patients who pursue genetic testing, DNA from cultured fibroblasts is the required specimen type. GeneDx can provide a punch biopsy kit and can culture fibroblasts on site, as needed.


Complimentary buccal swab kits are available for US and Canadian clients. To order kits, please visit www.genedx.com/supplies or email support@genedx.com. Contents include sponge swab, transport tube with tinted stabilizer solution, label for tube, and shipping box.


Follow enclosed directions.


Use the labels provided to place the patient name and date of birth on the transport tube.


Specimens may be held at room temperature before overnight shipping for up to 1 week (preferred) or up to 60 days (manufacturer’s limit).


Specimens will be rejected if the tinted stabilizing solution leaks out or if the transport tube is not labeled with patient name and additional ID.


Use the FedEx Clinical Pak provided. Ship overnight for arrival Monday-Saturday.

Ship to
GeneDx, 207 Perry Parkway, Gaithersburg MD 20877
Phone: 1-301-519-2100

Buccal Swab Collection and Shipping Instructions