Thank you for contacting Med-Stop

To learn more about how we can help in your compliance and testing needs, please fill out the contact form or call us at 1-877-633-3633.

Customer Service

Med-Stop Customer Service is available weekdays 9:00am-5:00 pm CST. If you have an after-hours emergency, please write us an e-mail to and we will respond as quickly as possible. For technical support please click here to visit Med-Stop Help center.

Quest Diagnostics Contact and Support

Please contact Quest Diagnostics for the information and support related to the collections performed by the Quest Diagnostics affiliated sites. Click here to visit the Quest Diagnostics contact web page or call 1-866-697-8378. Med-Stop does not provide direct support for the issues occurring during the collections in the Quest Diagnostics sites.

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What we can do for you?
Med-Stop Main Office location

Med-Stop Inc.
7042 N. Milwaukee Ave.
Niles, Illinois 60714

Toll-Free Phone Number

1-(877) 633-3633

Fax Number

1-(847) 647-6608

General E-Mail Address

Support E-Mail Address