Front Desk Phone: 314-454-8101 | Lab Phone: 314-362-7819

On-call Pager: 314-407-0269 | Fax: 314-454-5192

Email: Web:

Hours of operation: 8AM to 5:30PM CST, Monday-Friday
After hours: please leave a voice mail at 314-454-8101

For urgent matters, please page the Lab Manager or the Lab Supervisor at 314-407-0269.

Postal Mailing Address

Clinical Genomics Laboratory – Cytogenetics
Washington University School of Medicine
660 S. Euclid Avenue, Campus Box 8118
St. Louis, MO 63110

Specimen Shipping Addresses

Washington University- Department of Pathology & Immunology
Clinical Support Services Office
425 South Euclid Avenue, MSC 8024-14-4711
St. Louis, MO 63110

Specimen Drop-off Locations

Clinical Support Office
509 S. Euclid Ave.
4th Floor West Bldg., Room 4711
St. Louis, MO 63110
Tel: (314) 454-8101
(8:00am – 5:00pm)

Institute of Health (IOH) Core Lab
425 S. Euclid Ave.
Room 4701
St. Louis, MO 63110
Tel: (314) 362-1470