Contact Us

Submit a question, comment, or suggestion

Use our online contact form to submit an inquiry related to a Merck vaccine.

You must be a registered user to utilize this feature.

Give us a call

Merck Vaccine Customer Center
877.VAX.MERCK (877.829.6372)

If calling from Canada, please call the Merck Canada Order Desk at 800.463.7251.

To offer suggestions about Merck’s vaccine business,

call 800.235.1430

Callback service and Web conference

Use our Callback service if you would like to speak to, or begin a live Web conference with, a dedicated Vaccine Account Representative. This service is available between 8:00 AM and 6:30 PM ET, Monday through Friday.

You must be a registered user to utilize this feature.

Send us a fax

Please fax the Merck Vaccine Customer Center at 215.616.4514.

Send us mail

Merck & Co., Inc.
Vaccine Customer Center
351 N. Sumneytown Pike
UG2AB-20
North Wales, PA 19454

Give us a call

Merck Order Management Center
800.MERCK.RX (800.637.2579), Monday through Friday, 8:00 AM – 7:00 PM, ET.

If calling from Canada, please call the Merck Canada Order Desk at 800.463.7251.

Send us a fax

Please fax the Merck Order Management Center at 267.305.0783.

Send us mail

Merck & Co., Inc.
Order Management Center
351 N. Sumneytown Pike
UG-4C24
North Wales, PA 19454

Merck call centers are pleased to assist you from 8:00 AM to 7:00 PM ET, Monday through Friday.

To report an Adverse Experience directly to Merck: 800.NSC.MERCK (800.672.6372).

To report to the National Vaccine Adverse Event Reporting System (VAERS): 800.822.7967 / https://www.vaers.hhs.gov/

Requests for medical information concerning Merck products can be submitted online or by telephone.

To request information online, click here.

To request by phone: The Merck National Service Center will be pleased to assist you Monday through Friday 8:00 AM to 7:00 PM ET. Just call us at 800.672.6372.