DICO-C Passing Score 2026: Exactly What You Need to Pass

The Number That Decides Your Result: 70 of 100

The Certified Designated Infection Control Officer (DICO-C) credential, issued by the International Board of Specialty Certification (IBSC) and developed with the National Association of Public Safety Infection Control Officers (NAPSICO), uses a simple passing standard. According to the IBSC DICO-C FAQ, you must answer 70 questions correctly among the 100 scored items. That is the whole threshold: 70 correct answers, with no published curve you need to decode and no domain-by-domain minimums you must separately clear.

For emergency responders working in or moving into an infection-control-officer role, that clarity is useful. You are not trying to reach a vague "good enough" feeling. You are trying to bank 70 correct responses on scenario-driven questions about exposure control, transmission, vaccines, law, and post-exposure care.

Why 70 Is Not Measured Against 125 Questions

This is the single most common point of confusion. The DICO-C exam administers 125 questions, but only 100 of them are scored. The remaining 25 are unscored pilot items used to evaluate future questions. You will not be told which is which, so you must treat every question as if it counts.

Do not divide 70 by 125 and conclude you need to hit some lower or higher percentage across the full exam. Because pilot items are hidden among scored ones, you cannot calculate your running performance mid-exam with any reliability. The practical consequence: do not let one baffling question rattle you. It may be an unscored pilot item that has no effect on your result.

For a deeper look at how candidates experience the difficulty of the test, see How Hard Is the DICO-C Exam? Complete Difficulty Guide 2026. For what the available data suggests about outcomes, read DICO-C Pass Rate 2026: What the Data Shows.

What the Exam Actually Looks Like

Knowing the format helps you convert knowledge into correct answers under time pressure. The DICO-C exam is:

• Computer-delivered with four-option, single-best-answer multiple choice
• Applied and scenario-based, targeting specialty-level knowledge rather than entry-level training
• 2 hours 30 minutes long for 125 administered questions
• Closed-book and identity-checked

Two and a half hours across 125 questions works out to just over a minute per question. That is a workable pace for scenario items, but not a leisurely one. Because the handbook permits backward and forward review and changing answers, a sound approach is to answer everything on a first pass, flag anything uncertain, and use leftover time to revisit flagged items.

"Single best answer" matters. In a scenario about an occupational exposure, more than one option may sound reasonable. Your job is to choose the one that best fits the required action, sequence, or regulatory expectation. That is a skill you build through practice questions, not through rereading definitions. Our DICO-C practice test is built around exactly this applied, best-answer style.

Where the Scored Points Come From

The April 2026 candidate handbook is the blueprint reference, with a separately linked detailed outline dated October 7, 2020. The five domains carry these weights:

Since the exam has 100 scored items, those weights translate into an approximate share of your scored questions in each area. Expect roughly 30 scored questions from Domain 2, about 20 each from Domains 3 and 5, and about 15 each from Domains 1 and 4. Treat these as planning estimates rather than guarantees, since the exact distribution on your form can vary slightly and pilot items are mixed in.

The takeaway for scoring: the five domains are not equal. A candidate who is strong in exposure control plans but weak in vaccines can still reach 70, while a candidate who neglects Domain 2 gives up the biggest pool of points on the exam. For a full breakdown of each content area, see DICO-C Exam Domains 2026: Complete Guide to All 5 Content Areas.

Domain-by-Domain Targets for Earning 70

There is no published per-domain cut score, so the goal is a combined total of 70 correct. That gives you strategic flexibility, but it also means weak areas must be offset by strong ones. Here is what each domain asks of you.

Exam-Day Conditions That Affect Your Score

Your knowledge only counts if you are allowed to finish the exam. Rule violations and technical problems are avoidable score-killers.

• Closed-book and identity-checked: No notes, books, outside assistance, or unauthorized electronics. You need government-issued identification.
• Proctoring provider: The April 2026 handbook specifies TesTrac live remote proctoring, while IBSC and NAPSICO web pages also reference Prometric. Follow the provider and modality listed in your own current IBSC authorization when booking.
• Remote sessions: These use audio and video monitoring, so confirm your setup and environment requirements well before test day.
• Accommodations: These require supporting documentation and approval, so request them early rather than the week of your exam.

For scheduling windows and deadlines, see DICO-C Exam Dates 2026: Testing Windows, Deadlines & Scheduling.

Results, Retakes, and the Three-Attempt Rule

The DICO-C FAQ states that results are given within one hour, so the wait is short. If you do not reach the 70-correct standard, the retest rules apply:

1. Retesting requires new registration and full exam fees
2. You must wait at least 30 days after the previous attempt
3. The standard retest rule allows three total attempts

A Score-Driven Study Sequence

Rather than a generic schedule, sequence your preparation around where the 70 points come from. This is the only study-planning section in this article, and it is tied directly to blueprint weights.

For a broader preparation framework, see DICO-C Study Guide 2026: How to Pass on Your First Attempt, and for a compact last-minute review, use the DICO-C Cheat Sheet 2026: One-Page Review of Must-Know Facts.

What a Miss Costs You

The passing score ties directly into your budget, because every attempt is paid in full. The exam fee is $300 for NAPSICO members and $400 for nonmembers, and fees are nonrefundable. The optional NAPSICO study guide is $35, giving calculated exam-plus-guide subtotals of $335 for members or $435 for nonmembers. Those subtotals exclude membership dues, applicable tax or shipping, courses, and retakes.

Because a retake requires full fees again, a failed attempt roughly doubles your exam spend. A complete pricing view is in DICO-C Certification Cost 2026: Complete Pricing Breakdown.

After You Pass: Keeping the Credential

Passing earns a credential valid for three years. To renew, you can retake the exam or complete 18 directly relevant infection-control CE hours during the cycle, maintain eligibility, submit completion documentation for audit, and pay the renewal fee.

• Submit the CE-renewal application two to four months before expiration
• Documentation submitted less than 30 days before expiration incurs a $125 processing fee
• An expired credential requires re-examination

Confirm details against the IBSC Recertification Guidelines for DICO-C. If you are weighing the credential against your career goals, Is the DICO-C Certification Worth It? Complete ROI Analysis 2026 frames the decision, and DICO-C Requirements 2026: Eligibility, Prerequisites & How to Qualify covers who may sit for the exam. Keep in mind that certification eligibility (an emergency responder working as, or having the potential to work as, an Infection Control Officer, with an approved application and government-issued ID) is separate from any employer appointment requirements or course prerequisites.

Frequently Asked Questions

Ready to measure yourself against the 70-correct standard? Work through scenario-style items on the main DICO-C practice test site and track your results domain by domain before you book your exam.