BTS CPI
BTS Certified Professional in Infection Prevention and Control (CPI)
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Cheat sheet
Keep the key ideas within reach.
ExploreKey terms
Get comfortable with the vocabulary.
ExploreStudy plan
Give each week a clear focus.
ExploreCommon mistakes
Understand the traps and how to avoid them.
ExploreCase studies
Put your knowledge to work in context.
ExploreExam-day guide
Prepare for the day ahead.
ExploreAbout this exam
The BTS Certified Professional in Infection Prevention and Control (CPI) is a professional credential for practitioners who build, run, and evaluate infection prevention programs in healthcare settings. Candidates typically include infection preventionists, nurse educators, quality and safety staff, and clinical leaders who need to demonstrate working command of the field rather than niche expertise in a single department. The exam spans the full scope of the role: program management and leadership, microbiology and transmission, surveillance and outbreak investigation, standard and transmission-based precautions, hand hygiene and disinfection and sterilization, healthcare-associated infection prevention, occupational health and bloodborne pathogens, antimicrobial stewardship and multidrug-resistant organism control, and regulatory compliance and quality improvement. Expect applied questions built around realistic scenarios-interpreting a cluster of cases, choosing the right precaution, sequencing a sterilization process, or responding to a survey finding-rather than pure recall. Preparation works best as a structured pass through each domain, followed by practice questions that force you to justify your answer and identify the reasoning error when you miss. The official body publishes current details on registration, format, scheduling, fees, and scoring; confirm those directly with BTS before you plan your timeline.
What you'll study
About BTS CPI preparation
What does the CPI exam actually test?
Applied infection prevention practice across nine domains, from program leadership and surveillance to precautions, disinfection and sterilization, HAI prevention, occupational health, stewardship, and regulatory compliance. Questions are scenario-based, so you need to reason about what to do next, not just define terms.
How many questions are on the exam and how long is it?
The official body publishes the current question count, time limit, and format. Check the BTS website or your candidate handbook for the authoritative figures, since these can change between testing windows. Plan your pacing from that source rather than from secondhand reports.
How hard is the exam?
It is a professional-level exam: broad rather than deep, but it expects fluency across every domain. Candidates with day-to-day program experience usually find the content familiar; the difficulty is in the applied reasoning and in not neglecting lower-weight domains like stewardship and regulatory compliance.
What happens if I fail-can I retake it?
Retake rules, waiting periods, and any fee implications are set by BTS and published in its candidate materials. Confirm the current policy directly with the official body before you schedule, and use the score report to identify which domains to rebuild before your next attempt.
How should I order my studying?
Start with the two heaviest domains-program management and surveillance-because they frame how the rest of the material is applied. Then work through precautions, hand hygiene and disinfection, and HAI prevention as a connected block. Finish with occupational health, stewardship, and regulatory compliance so nothing is left unseen.
Why do candidates miss questions they thought they knew?
Usually because they answer from habit rather than from the scenario. Read for the setting, the organism, and what has already been done, then choose the next correct action. When you review a miss, write down the specific reasoning error-not just the right answer-so the pattern doesn't repeat.
Do I need to memorize organisms and their transmission routes?
You need working knowledge, not a catalogue. Know the routes and precautions for the organisms that drive practice decisions-C. difficile, MRSA, CRE, tuberculosis, and bloodborne pathogens-and be able to connect an organism's characteristics to the precaution and cleaning choices it requires.
How much math or epidemiology is on it?
Surveillance and outbreak investigation carry real weight, so be comfortable with rates, denominators, and basic outbreak reasoning such as comparing observed cases with what you would expect. You do not need advanced statistics, but you do need to interpret surveillance data correctly.
Is this the same as other infection prevention certifications?
No. Credentials differ in scope, eligibility, and governance. This page is independent study material and is not affiliated with or endorsed by BTS. Verify eligibility, exam content outline, and current policies with the official body before registering.