The short answer
The RCIS is challenging but very passable. It is hard mainly because it is broad — 170 questions spanning the entire cath lab in 3 hours — and because it is scored on a scaled system where 650 of 900 passes, not a fixed percentage. CCI does not publish an official pass rate. Candidates who struggle usually have thin hemodynamics or under-prepared on the smaller domains, not bad luck.
Why the RCIS feels hard
Three things make it demanding. First, breadth: the blueprint runs from coronary anatomy and hemodynamics to PCI, structural interventions, emergencies, and pre- and post-procedural care. Second, depth in hemodynamics — waveform recognition and calculations reward true understanding, not memorization. Third, time pressure: 170 questions in 3 hours is roughly a minute each.
It is a scaled score, not a percentage
You need a scaled score of 650 on a 0–900 scale. That is not "72% correct" — the bar is calibrated to each form's difficulty, so there is no fixed percent that guarantees a pass. This is exactly why blueprint-matched full-length practice is a better readiness signal than your percentage on a pile of random questions. We break this down in the RCIS passing score explained.
Is there an official pass rate?
No. CCI does not publish an official RCIS pass rate, and figures you see quoted online are generally unverified. Do not anchor on a number you cannot source — judge your own readiness by how you perform on timed, full-length, blueprint-matched mock exams.
Who finds it hardest
Two patterns are common. People who over-study the big procedure domains and neglect the smaller ones (emergencies is 13%, pre- and post-procedural care are 8% and 5%) leave easy points on the table. And clinicians crossing into the cath lab — strong on patient care and pharmacology but rusty on hemodynamic math — feel the diagnostic content hardest. The RCIS blueprint tells you exactly where to weight your time.
How to know you are ready
The clearest signal: you consistently pass full-length, timed mock exams that match the blueprint, and you can explain why the right answer is right on every question you missed. When that is true, the exam stops feeling like a gamble.
Gauge your readiness for free
Try 25 free RCIS practice questions with worked explanations, or take the free scored diagnostic to see which domains still need work.
Try free RCIS questions The RCIS Exam: Complete 2026 Guide →Frequently asked
What is a passing score on the RCIS?
A scaled score of 650 on a 0-900 scale. It is a scaled score set against the exam's difficulty, not a fixed percentage correct.
Does CCI publish an RCIS pass rate?
No. CCI does not publish an official RCIS pass rate. Judge your readiness by your performance on full-length, timed, blueprint-matched mock exams rather than unverified figures online.
How many questions can you miss on the RCIS?
There is no fixed number, because scoring is scaled and 20 of the 170 questions are unscored pretest items. Aim to master the material rather than to hit a target miss-count.