Contact Us

If you have any general questions about the Merck Patient Assistance Program, please call 1-800-727-5400, Monday through Friday, 8 AM to 8 PM ET.

800-727-5400 - for general eligibility and application question

888-727-0085 - for online application issues

Merck Patient Assistance Program
PO Box 690
Horsham, PA 19044-9979


For contact information about a specific program, please refer to the Programs page.