Blood Collection and Shipping Instructions – Including Cord Blood

Exceptions: Blood is not accepted if the patient has ever received an allogeneic bone marrow transplant/stem cell transplant. Cultured fibroblasts are required. GeneDx can provide a punch biopsy kit and can culture fibroblasts on site, as needed.
 Kits: Complimentary blood kits are available for US and Canadian clients. To order kits, please visit or email
Safety Data Sheet – EDTA
Safety Data Sheet – Heparin
Volume: One EDTA (lavender top) tube containing 2-5 mL whole sterile blood. Several tests usually can be performed on one 3 mL blood specimen. 3-5 mL is the preferred volume for adults but 1-2 mL is acceptable for infants.
Labeling: Label with the patient name plus a second identifier such as date of birth, specimen ID or medical record number. If Cord Blood, state so on both the tube and the paperwork.
Stability: Can be refrigerated up to 7 days before shipping. Blood specimens older than 7 days can still be shipped; they will be tested if the yield and quality of DNA permit.
Rejection: Blood specimens will be rejected if frozen, hemolyzed or clotted.
Shipping: Ideal handling is to ship immediately at ambient temperature for overnight delivery with arrival Monday-Saturday. Specimens can be refrigerated for 7 days before shipping. In hot weather a cool pack can be enclosed.

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