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ONCC doesn’t publish a public first-time CBCN pass rate, so treat specific numbers online as
unverified. Here’s an honest look at what makes the exam demanding.
What makes the CBCN challenging?
- The clinical detail is specific. Receptor status (ER/PR/HER2), staging, and the
matching treatments must be precise. - It spans the whole continuum. From screening and genetics to treatment,
survivorship, and coordination of care. - It’s a subspecialty. You’re expected to know breast care in depth, not just
general oncology.
How to make it manageable
Lock down receptor-directed treatment and staging, then study across all five subject areas with
timed practice. Our bank gives you 2,100+ CBCN questions across 15 timed simulators, plus a free sample
to find your gaps. If you also work general oncology, our OCN vs CBCN guide
can help you decide whether to add the OCN too.
Unlock 2,100+ CBCN practice questions across 15 full-length simulators — $19.99 lifetime →
Sources & references
The exam facts on this page are drawn from official certifying-body materials, reviewed 2026-06-18 by the DrCertifications exam-prep team (10+ years in exam preparation and publishing).