Contact Us

Contact Us

Y-mAbs is striving to make a difference in the treatment of pediatric oncology.
Connect with us.

Contact Information

In the US:
Y-mAbs Therapeutics, Inc.
230 Park Avenue, Suite 3350
New York, NY 10169
Telephone: +1 646 885 8505
Email: [email protected]
Y-mAbs Therapeutics, Inc.
R&D Laboratories
111 Ideation Way
Basement Floor, Room C-008
Nutley, NJ 07110
Telephone: +1 646 885 8505
Email: [email protected]
In the EU:
Y-mAbs Therapeutics A/S
Agern Allé 11, ground floor
2970 Hørsholm
Tlf.: +45 70 26 14 14
Email: [email protected]

Medical Information Request

To request medical information, please call 1-833-33YMABS (1-833-339-6227) and select option 1, or you may submit a medical question to [email protected]. You may also find information on our medical website, The information provided on this medical website is intended only for use by healthcare professionals practicing in the United States.

Product Complaints and Adverse Events

To report an adverse reaction or product complaint, please contact us at 1-833-33YMABS (1-833-339-6227). Reports can also be made directly to FDA at or 1-800-FDA-1088 (1-800-332-1088).

Reporting Compliance Concerns

To report a compliance concern, please click here, or call 844-951-1999. The Y-mAbs Compliance Integrity Hotline is a telephone and web-based confidential reporting system.

General Inquiries

For all other inquiries, please email [email protected] or call 646-885-8505.

Y-mAbs Connect

Y-mAbs ConnectTM provides answers to questions related to access, insurance, financial support programs, and other resource programs for qualifying patients. To reach a Y-mAbs Connect Case Manager, contact us Monday through Friday, 8 am to 8 pm ET, at
1-833-33YMABS (1-833-339-6227) and select option 2.