- What You Are Actually Studying For
- Exam Mechanics: Format, Scoring, and Conditions
- Eligibility, Fees, and Booking Logistics
- Reading the Blueprint: Where the Points Live
- Domain-by-Domain Study Priorities
- Handling Scenario-Based Questions
- A Domain-Ordered Study Sequence
- Exam Day: Remote Proctoring and Time Management
- After the Exam: Results, Retakes, and Recertification
- Frequently Asked Questions
- You need 70 correct answers among the 100 scored items; 25 of the 125 questions are unscored pilot items.
- Exposure Control Plan Components is the largest domain at 30%, so it deserves the biggest share of study time.
- Exam fees are $300 for NAPSICO members and $400 for nonmembers, nonrefundable, with a 30-day wait before any retest.
- Questions are applied, scenario-style, single-best-answer items, so practice applying rules rather than memorizing them.
What You Are Actually Studying For
The Certified Designated Infection Control Officer (DICO-C) credential is awarded by the International Board of Specialty Certification (IBSC) and was developed with the National Association of Public Safety Infection Control Officers (NAPSICO). It is built for emergency responders who work as, or have the potential to work as, an Infection Control Officer for their agency. If you are new to the credential, the overview at What Is DICO-C Certification? covers the basics before you commit to a study plan.
That context matters for how you prepare. The exam targets specialty-level knowledge rather than entry-level training. It assumes you already understand the fire, EMS, or law enforcement environment, and it tests whether you can run the infection control function inside it: writing and maintaining an exposure control plan, recognizing transmission risks on the job, managing vaccines and immunizations, and guiding a responder through post-exposure care.
Exam Mechanics: Format, Scoring, and Conditions
Format at a glance
| Element | DICO-C Detail |
|---|---|
| Administered questions | 125 total |
| Scored questions | 100 |
| Unscored pilot items | 25 |
| Time allowed | 2 hours 30 minutes |
| Question type | Four-option, single-best-answer multiple choice, applied/scenario content |
| Delivery | Computer-delivered |
| Passing standard | 70 correct among the 100 scored items |
| Results | Per the DICO-C FAQ, within one hour |
The scoring detail that trips people up
The passing standard is 70 correct answers among the 100 scored items. Do not calculate it against all 125 administered questions. You cannot tell which 25 items are the unscored pilot questions, so treat every question as if it counts. The practical consequence is that a question that feels strange or poorly written might be a pilot item, and you should not let it drain your time or confidence. For a deeper explanation, see DICO-C Passing Score 2026: Exactly What You Need to Pass.
Conditions you will test under
- Closed-book and identity-checked, with no notes, books, outside assistance, or unauthorized electronics.
- Remote sessions use audio and video monitoring.
- The handbook permits moving backward and forward through the exam and changing answers, so flagging and returning is a legitimate strategy.
- Accommodations require supporting documentation and approval, so start that process early rather than the week before your appointment.
Eligibility, Fees, and Booking Logistics
Eligibility versus employer requirements
Certification eligibility is straightforward: you must be an emergency responder working as, or with the potential to work as, an Infection Control Officer, and you need an approved examination application and government-issued identification. Keep this separate from any appointment requirements or course prerequisites your own agency may impose for the designated officer role. Those are employer rules, not exam rules. The full breakdown is in DICO-C Requirements 2026: Eligibility, Prerequisites & How to Qualify.
What the exam costs
| Item | NAPSICO Member | Nonmember |
|---|---|---|
| Exam fee | $300 | $400 |
| Optional NAPSICO study guide | $35 | $35 |
| Calculated exam-plus-guide subtotal | $335 | $435 |
Exam fees are nonrefundable. The subtotals above exclude membership dues, applicable tax or shipping, courses, and any retakes. Because the nonmember premium is $100 and the study guide is only $35, it is worth pricing out whether NAPSICO membership makes sense for you before you pay, but check current membership dues yourself since they are not part of the exam fee. A full pricing walkthrough is available in DICO-C Certification Cost 2026: Complete Pricing Breakdown.
Booking the exam
Provider details can differ depending on where you look. The April 2026 candidate handbook specifies TesTrac live remote proctoring, while IBSC and NAPSICO web pages also reference Prometric. The reliable rule: follow the provider and modality named in your own current IBSC authorization. Do not assume a testing center or remote session until your authorization says so. For timing questions, see DICO-C Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Reading the Blueprint: Where the Points Live
The blueprint reference is the April 2026 candidate handbook, along with a separately linked detailed outline dated October 7, 2020. When the two seem to differ in emphasis, use the handbook as your primary reference for weighting and treat the older outline as supplementary detail on topics. The five domains and their weights are:
| Domain | Weight |
|---|---|
| Domain 1: Laws Applicable to Infection Control | 15% |
| Domain 2: Exposure Control Plan Components for Bloodborne Pathogens, TB, and other Airborne/Droplet Transmitted Diseases | 30% |
| Domain 3: Risks for Disease Transmission | 20% |
| Domain 4: Vaccines and Immunizations | 15% |
| Domain 5: Post-Exposure Medical Care | 20% |
Two things stand out. First, Domain 2 carries nearly a third of the exam, so weakness there is very hard to offset. Second, Domains 3 and 5 together add up to 40%, which means the practical, hands-on side of exposure risk and aftercare matters about as much as the planning document itself. A fuller walkthrough lives in DICO-C Exam Domains 2026: Complete Guide to All 5 Content Areas.
Domain-by-Domain Study Priorities
Domain 2: Exposure Control Plan Components (30%)
This is the center of gravity. Expect questions that ask what a compliant plan must contain and how an Infection Control Officer applies it across bloodborne pathogens, tuberculosis, and other airborne or droplet-transmitted diseases.
- Know the required elements of an exposure control plan and who is responsible for each.
- Distinguish bloodborne controls from airborne and droplet controls, since the precautions, protective equipment, and engineering measures differ.
- Understand how a plan is reviewed, updated, and communicated to personnel.
- Practice identifying which control (engineering, work practice, or protective equipment) best fits a described scenario.
Domain 3: Risks for Disease Transmission (20%)
This domain tests whether you can recognize how and where exposures happen in emergency response work.
- Match pathogens to their transmission routes: bloodborne, airborne, droplet, and contact.
- Identify high-risk tasks and environments for responders, and the factors that raise or lower exposure risk.
- Be ready to rank risks in a scenario and select the most appropriate protective response.
Domain 5: Post-Exposure Medical Care (20%)
Expect sequence-driven questions: what happens first, what is documented, and who is notified after an exposure incident.
- Know immediate response steps after a sharps injury, mucous membrane splash, or other exposure.
- Understand evaluation, follow-up, and confidentiality expectations for the exposed responder.
- Review the Infection Control Officer's role in documentation and in coordinating with medical providers.
Domain 1: Laws Applicable to Infection Control (15%)
Legal questions reward precision about what a rule requires and whom it covers.
- Learn the major regulations and standards that govern responder exposure and infection control programs.
- Be able to tell which requirement applies to which situation, rather than reciting rule names alone.
- Confirm your study material reflects current requirements, since regulatory references can change over time.
Domain 4: Vaccines and Immunizations (15%)
This domain covers how immunization fits into an exposure control program for responders.
- Understand which vaccines are relevant to responders and how an agency offers and documents them.
- Know how declination, titers, and follow-up are handled at a program level.
- Be ready for scenarios that combine vaccine status with a post-exposure decision.
Handling Scenario-Based Questions
The exam uses applied, single-best-answer scenarios, which means more than one option may sound reasonable. Your job is to find the best answer for the stated situation. A few habits help here:
- Read the role first. Ask what the Infection Control Officer is responsible for in the scenario versus what a supervisor, medical provider, or the exposed responder handles.
- Identify the domain. A question about a needlestick that mentions vaccine status can pull from Domain 3, 4, and 5 at once. Naming the primary domain helps you recall the right rule.
- Watch for sequence words. "First," "initial," and "most appropriate" signal that order matters.
- Eliminate by scope. Discard options that are outside the Infection Control Officer's authority or that skip a required step.
Key Takeaway
When you review practice questions, spend more time on why the three wrong options fail than on why the right one works. Single-best-answer items are won by recognizing near-misses. Our DICO-C practice test is built around that scenario style.
A Domain-Ordered Study Sequence
Because the blueprint weights are so uneven, schedule by weight rather than by the order in the handbook. This sample sequence assumes about six weeks and should be stretched if your schedule is tight or if infection control is new to you. If you are unsure how much time you need, How Hard Is the DICO-C Exam? Complete Difficulty Guide 2026 can help you calibrate.
Domain 2 first
- Start here because it is 30% of the exam and its concepts feed every other domain.
- Build a one-page outline of plan components for bloodborne, TB, and airborne/droplet diseases.
- Finish with a short block of scenario questions.
Domain 3: transmission risks
- Build a pathogen-to-route table and tie each route to its controls from Domain 2.
- Practice ranking risk in responder scenarios.
Domain 5: post-exposure care
- Learn the response sequence cold, since sequence questions reward order.
- Connect each step to documentation and medical follow-up duties.
Domains 1 and 4
- Cover laws and vaccines/immunizations together, since both are 15% and both reward precise recall.
- Revisit how vaccine status changes post-exposure decisions.
Timed mixed practice
- Sit full-length timed sets with realistic pacing for 125 questions in 2 hours 30 minutes.
- Return to your weakest domain, weighted by its share of the exam.
A one-page review sheet helps in the final days; our DICO-C Cheat Sheet 2026: One-Page Review of Must-Know Facts is a good model for what to condense. Note that you cannot bring notes into the exam itself, so use sheets like this only for review beforehand.
Exam Day: Remote Proctoring and Time Management
Before you start
- Re-read your IBSC authorization to confirm the provider and delivery method.
- Have your government-issued identification ready, since the session is identity-checked.
- Prepare a clear, compliant testing space if you are testing remotely, and remove unauthorized electronics, notes, and books.
Pacing the clock
You have 150 minutes for 125 questions, which works out to roughly 1.2 minutes per question. Move steadily through the first pass, flag anything that needs real thought, and use the handbook's allowance for backward and forward review to return to flagged items. Since 25 items are unscored and unidentifiable, do not sink several minutes into a single puzzling question. Answer every item; there is no benefit to leaving any blank.
After the Exam: Results, Retakes, and Recertification
The DICO-C FAQ gives results within one hour. If you pass, the credential is valid for three years. If you do not, you need to register again, pay the full exam fee, and wait at least 30 days, with three total attempts under the standard retest rule. For context on how candidates tend to fare, see DICO-C Pass Rate 2026: What the Data Shows.
Recertification options
| Path | What It Involves |
|---|---|
| Renew by examination | Retake the exam within the certification cycle |
| Renew by continuing education | 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, so mark your expiration date the day you pass.
Career value without false promises
The credential demonstrates specialty knowledge to employers and agencies that appoint infection control officers, such as fire departments, EMS agencies, and law enforcement organizations. Pay, however, is driven mainly by your underlying emergency-response or healthcare role and your employer, not by a certification premium. When you weigh the investment, compare it against your own role and agency; our DICO-C Salary Guide 2026: Complete Earnings Analysis and Is the DICO-C Certification Worth It? Complete ROI Analysis 2026 walk through that comparison.
Frequently Asked Questions
You need 70 correct answers among the 100 scored items. The exam administers 125 questions, but 25 are unscored pilot items, so the passing standard is not calculated against all 125.
Start with Exposure Control Plan Components for Bloodborne Pathogens, TB, and other Airborne/Droplet Transmitted Diseases. At 30%, it is the largest domain, and its concepts support the transmission risk and post-exposure domains.
The exam fee is $300 for NAPSICO members and $400 for nonmembers, and fees are nonrefundable. The optional NAPSICO study guide is $35, bringing the calculated subtotals to $335 for members or $435 for nonmembers, excluding membership dues, tax or shipping, courses, and retakes.
Yes. A retest requires new registration, the full exam fee, and at least 30 days after your previous attempt. The standard retest rule allows three total attempts.
The certification is valid for three years. You can renew by examination or by completing 18 directly relevant infection-control CE hours, submitting documentation for audit, and paying the renewal fee. Submit the CE application two to four months before expiration to avoid the $125 late-documentation fee.
Pair the sequence above with timed scenario practice, and use the official IBSC and NAPSICO materials as your source of truth for fees, providers, and dates. You can also review the broader credential background in DICO-C Certification and training options in DICO-C Training. Sources: IBSC DICO-C Candidate Handbook, April 2026, pp. 5-8; the IBSC designated infection control officer role page and DICO-C exam FAQs; the NAPSICO DICO certification page; and the IBSC Recertification Guidelines for the DICO-C.