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.

You can also connect with NBCA on Facebook, Twitter, Instagram and Pinterest.

Current News

Surveying Patients’ Experiences and Prespectives on Blood Clot Care

From Survey to Science: How Patient Experiences are Shaping Blood Clot Care

In 2023, NBCA and our Council of Emerging Researchers in Thrombosis (CERT) launched the first large-scale, international survey to capture…
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2025 Fun Run Graphics (500 x 500 px) (1)

NBCA Hosting 6th 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…
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