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.

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

Use our Callback service if you would like to speak to a dedicated Merck 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 215.631.5224.


Send us mail

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

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 / http://www.vaers.hhs.gov/