Cleared the NCAC I last year and just passed the NCAC II last month. The jump in difficulty is significant. NCAC I felt manageable with about 8 weeks of prep, but NCAC II needed closer to 14 weeks and a much deeper understanding of clinical supervision, ethics, and treatment planning theory. Don't underestimate the gap between the two levels.
For the NCAC I, the content covers eight domains and the questions are mostly knowledge-level. You need to know the stages of addiction, motivational interviewing basics, and the major treatment modalities. Working through a CAC practice test was how I identified which domains I was weakest in, which turned out to be case conceptualization and documentation.
NCAC II goes much deeper into ethics scenarios and supervision practice. Probably 25 to 30% of my exam was ethics-related, and unlike knowledge questions, those require judgment calls in gray-area situations. The NAADAC ethics code is worth reading fully, not just skimming. Specific language from those standards shows up directly in the questions.
One thing that helped for both levels was finding people who'd recently passed and asking what content areas surprised them. The official content outlines are accurate but don't communicate weighting or question style. That context from recent test-takers is hard to replace with any study guide.
Supervision content on the NCAC II was denser than I expected. If you don't have direct supervision experience, reading case examples beforehand helps. The questions assume some practical frame of reference.
The ethics jump between NCAC I and II is no joke. I went in expecting a similar experience and it wasn't. The scenario questions are much more ambiguous at Level II and require real familiarity with the NAADAC code, not just general awareness.
Eight weeks for NCAC I is a solid estimate. If you've been working in the field for a few years already, 6 weeks might be enough. A lot of the material will feel familiar from day-to-day practice.
Documenting your supervision hours is its own administrative challenge separate from exam prep. Start tracking those early — don't leave it until you're trying to submit your application.