DICO-C Pass Rate 2026: What the Data Shows

What We Can and Cannot Say About the DICO-C Pass Rate

Search for the DICO-C pass rate and you will find a lot of confident-sounding numbers. Be skeptical of all of them. The International Board of Specialty Certification (IBSC), which administers the Certified Designated Infection Control Officer credential in partnership with the National Association of Public Safety Infection Control Officers (NAPSICO), does not publish a pass-rate percentage in the candidate handbook or the exam FAQ pages we reviewed. That means any specific figure you see quoted elsewhere is either unsourced, borrowed from a different credential, or simply invented.

This article takes a different approach. Instead of repeating a number we cannot verify, we walk through what the published data does tell you: the scoring rule, the exam structure, the blueprint weights, the retake policy, and the candidate population. Those facts are enough to build a realistic picture of how difficult the exam is and how to prepare so that the pass rate stops being your concern and your own readiness becomes the focus.

If you want a broader read on difficulty from a candidate's perspective, our guide on how hard the DICO-C exam is covers the qualitative side in detail.

How Passing Works: 70 of 100 Scored Items

The single most important data point for understanding your odds is the scoring rule. According to the IBSC DICO-C FAQ, you pass by answering 70 correct among the 100 scored items. This is where many candidates miscalculate.

The exam administers 125 questions in total. Of those, 100 are scored and 25 are unscored pilot items that IBSC uses to evaluate future questions. You will not be told which are which. The 70-correct requirement applies to the scored set only, so do not divide 70 by 125 and conclude you need a certain percentage across everything you see on screen.

Because you cannot identify the pilot items, treat every question as if it counts. A practical consequence: if a question feels unusually obscure or oddly worded, do not let it rattle you. It may be one of the 25 unscored items. For a deeper breakdown of the scoring rule, see our dedicated page on the DICO-C passing score.

Exam Format and Why It Shapes Outcomes

The DICO-C is computer-delivered with four-option, single-best-answer multiple choice. Content is applied and scenario-based rather than pure recall. That matters for pass odds in a specific way: candidates who memorize definitions but have not practiced applying them to a situation tend to struggle with "best answer" items where two options look defensible.

What "single best answer" demands

In a scenario about an occupational exposure on an ambulance call, more than one response may be reasonable in the abstract. The exam wants the response that best fits the applicable standard, the correct sequence of actions, or the priority the plan should establish. Practicing with scenario questions trains this discrimination far better than rereading notes.

Exam conditions

• Closed-book and identity-checked, with no notes, books, outside assistance, or unauthorized electronics.
• Government-issued identification is required along with an approved examination application.
• Remote sessions use audio and video monitoring.
• The handbook permits moving backward and forward through questions and changing answers, so you can flag difficult items and return to them.
• Accommodations require supporting documentation and approval in advance.

Timing is generous relative to the question count, at roughly a minute and a half per administered item. Candidates rarely fail because of the clock; they fail because of content gaps in the heavily weighted domains. If you are planning your testing window, our DICO-C exam dates and scheduling guide covers the booking side.

Where the Points Live: Blueprint Weights

The blueprint is the best predictor of where a pass is won or lost. The April 2026 candidate handbook is the reference, with a separately linked detailed outline dated October 7, 2020. When you cross-check study materials, confirm they align with the current handbook weights below.

Applied to a 100-item scored set, these weights suggest roughly 30 items from Domain 2, 20 each from Domains 3 and 5, and 15 each from Domains 1 and 4. Treat those counts as an approximation of emphasis rather than a guaranteed item tally. With 70 correct required, you can afford to miss up to 30 scored items, but concentrating those misses in Domain 2 would be costly because it is the biggest single block.

For a full walkthrough of every content area, read our complete guide to all five DICO-C exam domains.

Who Sits for the Exam

The eligibility language is broad: an emergency responder working as, or having the potential to work as, an Infection Control Officer, plus an approved examination application and government-issued identification. The pool therefore includes working infection control officers in fire, EMS, and law enforcement agencies, as well as responders preparing for an appointment.

This mix has implications for outcomes. Candidates who already manage exposure incidents or maintain an agency plan bring practical context that makes scenario questions more intuitive. Candidates coming from a field role without infection control duties often have strong clinical or operational instincts but lack familiarity with the regulatory and program-administration vocabulary, particularly in the laws and exposure control plan domains.

Keep two ideas separate here. Certification eligibility is one thing; an employer's appointment requirements or any course prerequisites your agency imposes are another. You can review the eligibility rules in our DICO-C requirements guide, and explore where credential holders work on the DICO-C jobs page.

Where Candidates Tend to Lose Points

Without published statistics, we cannot tell you which domain has the lowest average score. What we can describe are the structural reasons candidates in this field typically fall short, based on the exam's design and the backgrounds of the people who take it.

Treating it like an entry-level test

The exam targets specialty-level knowledge rather than entry-level training. Someone who has completed basic bloodborne pathogens awareness training may assume that covers it. It does not. The expectation is that you can administer a program, not simply follow its rules.

Under-studying the legal framework

Domain 1 carries 15% and is the most memorization-heavy. Candidates who skim it often lose easy points on questions about which requirements apply to which employers and what obligations the standards impose.

Confusing transmission categories

Domains 2 and 3 both require you to distinguish bloodborne, airborne, and droplet pathways and match controls to each. Mixing up which precautions belong with which route is a classic source of wrong answers on best-answer items.

Neglecting vaccines and immunizations

At 15%, Domain 4 is the same weight as laws, yet it often gets the least attention because it feels like background knowledge. Questions on immunization recommendations, documentation, and declination are very testable.

Retake Rules and the Cost of a Miss

Understanding the retake policy is part of reading the data, because it defines the real stakes of a first attempt. Under the standard rule, retesting requires new registration, full exam fees, and at least 30 days after the previous attempt, with three total attempts permitted.

Fees are nonrefundable, and the subtotals above exclude membership dues, applicable tax or shipping, courses, and retakes. A failed attempt therefore means paying the full fee again, plus waiting at least 30 days. That makes a single well-prepared first attempt the most economical path. For a full pricing picture, see our DICO-C certification cost breakdown.

After you pass

The credential is valid for three years. You can renew by examination or by completing 18 directly relevant infection-control CE hours during the cycle, maintaining eligibility, submitting completion documentation for audit, and paying 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, so a lapse effectively puts you back at the start.

A Domain-Weighted Readiness Plan

Since the pass rate is not published, the most reliable indicator of your odds is your own performance on realistic questions. The timeline below sequences the domains by weight and by dependency: you need the legal and program framework before the transmission and post-exposure scenarios make full sense.

If you need a structured resource, our DICO-C study guide expands on this approach, and the DICO-C cheat sheet is useful for last-week review. When you are ready to test yourself under realistic conditions, our DICO-C practice test offers scenario-style questions organized by domain, and you can return to the main practice site to track which areas need more work.

Frequently Asked Questions

The takeaway is simple: the pass rate you should care about is your own. Learn the scoring rule, weight your preparation to the blueprint, practice with scenario questions until the 70-of-100 standard feels routine, and sit the exam once, ready.