Contact Us

ASH standard customer service hours are Monday through Friday, 9:00 a.m. – 5:00 p.m. Eastern time. During these hours, contact an agent using any of the following methods:

• Phone: 866-828-1231(U.S. Toll Free) or 001-202-776-0544 (international callers)
• Email: customerservice@hematology.org
• Complete the online form below