Contact Us

National Blood Clot Alliance
PO Box 825687
Philadelphia, PA 19182-5687

Email: info@stoptheclot.org
Phone: 703.935.8845
Toll Free: 877.4.NO.CLOT

More Ways to Contact the National Blood Clot Alliance

Sign up for NBCA’s mailing list to receive news and updates concerning prevention, treatment, education and advocacy about blood clots and clotting disorders. Find out about NBCA-sponsored events and volunteer opportunities.

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Current News

NBCA Hosting 5th Annual Fun Run in Honor of World Thrombosis Day

Did you know that World Thrombosis Day takes place every year on October 13 to turn the world’s attention to…

Take the NBCA Patient Experience Survey

National Blood Clot Alliance is conducting a research study about the experiences of patients with venous blood clots at the…