Have a question? ONCC is here to help!
You can call us during our business hours or send a message using the form below.
Hours
Business Hours
8:30 am–5:00 pm EST, Monday–Friday.
Address
Oncology Nursing Certification Corporation
125 Enterprise Drive
Pittsburgh, PA 15275
The ONCC office will be closed December 24 – January 1 for winter break. Normal business hours will resume January 2, 2026, at 8:30am (EST).
If you experience exam scheduling/test center issues during this time, please contact PSI at ONCC.support@psionline.com.
Directions
Contact Information
Phone:
412.859.6104
Toll-free:
877.769.ONCC
(US and Canada only)
Fax number:
412.859.6167 (new)
Email:
oncc@oncc.org