- What the DICO-C Credential Actually Is
- Who Qualifies to Sit for the Exam
- Exam Format, Scoring and Test-Day Rules
- The Five Domains and What Each One Tests
- Fees, Study Guide and Total Outlay
- Registration, Proctoring and Retests
- A Domain-Weighted Study Sequence
- Where the Credential Fits in Your Career
- Keeping the Credential: Three-Year Renewal
- Frequently Asked Questions
- The exam has 125 questions, but only 100 are scored; the other 25 are unscored pilot items.
- Passing requires 70 correct answers among the 100 scored items, not 70 percent of all 125.
- Exposure Control Plan Components is the heaviest domain at 30% of the blueprint.
- Exam fees are $300 for NAPSICO members and $400 for nonmembers, and they are nonrefundable.
What the DICO-C Credential Actually Is
The Certified Designated Infection Control Officer credential, abbreviated DICO-C, is awarded by the International Board of Specialty Certification (IBSC). It was developed with the National Association of Public Safety Infection Control Officers (NAPSICO), which tells you a lot about its purpose: it is built for emergency responders who carry infection-control responsibility inside fire, EMS, law enforcement and similar public safety organizations.
If you are still orienting yourself, our explainers on what DICO-C certification is and what DICO-C stands for cover the basics. This article goes further, walking through the exam mechanics, the content you must master and the practical decisions that come before test day.
Who Qualifies to Sit for the Exam
Certification eligibility is deliberately broad. The IBSC describes the target candidate as an emergency responder who works as, or has the potential to work as, an Infection Control Officer. You also need an approved examination application and government-issued identification for check-in.
Two distinctions save candidates a lot of confusion:
- Certification eligibility is what the IBSC requires to let you test.
- Employer appointment requirements are whatever your agency or jurisdiction requires before it formally designates you as its infection control officer, which may include specific courses.
These are separate. A course your department demands for appointment does not automatically become an IBSC prerequisite, and passing the exam does not by itself appoint you. For a fuller treatment, see our guide to DICO-C requirements and how to qualify, and check your own agency's policy on the appointment side.
Exam Format, Scoring and Test-Day Rules
Question Count and Timing
You will face 125 administered questions in 2 hours 30 minutes. Of those, 100 are scored and 25 are unscored pilot items used to evaluate future questions. You will not be told which are which, so treat every item as if it counts. That works out to roughly 72 seconds per question across the full set, which is comfortable if you do not stall on any single item.
Question Style
The exam is computer-delivered, with four-option, single-best-answer multiple choice. Much of the content is applied or scenario-based: a responder is exposed on a call, a crew member's vaccination status is unclear, a regulation applies in a particular way. The skill being tested is choosing the best action or interpretation among plausible options. Our breakdown of how hard the DICO-C exam is discusses why that style trips up candidates who only memorize facts.
The Passing Score
| Item | Detail |
|---|---|
| Questions administered | 125 |
| Questions scored | 100 |
| Unscored pilot questions | 25 |
| Correct answers needed to pass | 70 of the 100 scored items |
| Time allowed | 2 hours 30 minutes |
| Results | Within one hour, per the IBSC FAQ |
A common mistake is calculating the passing line against all 125 questions. The IBSC FAQ specifies 70 correct among the 100 scored items. Because you cannot identify the pilot questions, the practical takeaway is simple: answer everything carefully. More detail is in our article on the DICO-C passing score.
Conditions in the Testing Session
- Closed-book: no notes, books, outside assistance or unauthorized electronics.
- Identity is checked before you begin.
- Remote sessions use audio and video monitoring.
- The handbook permits moving backward and forward through the exam and changing answers.
- Accommodations require supporting documentation and approval, so request them well before your intended date.
The Five Domains and What Each One Tests
The blueprint reference is the April 2026 candidate handbook, with a separately linked detailed outline dated October 7, 2020. Because those two documents differ in date, always confirm which outline your authorization points to and read both. For a deeper domain-by-domain treatment, see our complete guide to the five DICO-C content areas.
| 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% |
Domain 2: Exposure Control Plan Components (30%)
This is the largest domain and the center of gravity for the entire exam. A designated officer owns the exposure control plan, so questions test whether you can build, maintain and apply one across bloodborne, tuberculosis and other airborne or droplet-transmitted hazards.
- What a written exposure control plan must contain and how often it is reviewed
- Engineering controls, work practice controls and personal protective equipment, and how each applies to the pathogen involved
- Differences between bloodborne precautions and airborne or droplet precautions in the field
- Training, recordkeeping and how exposures are documented
Domain 3: Risks for Disease Transmission (20%)
Here the exam checks whether you understand how pathogens actually move and which responder activities create risk.
- Routes of transmission: bloodborne, airborne, droplet and contact
- Which patient contacts, procedures and environments carry elevated risk
- Recognizing high-risk scenarios and choosing the appropriate protective response
Domain 5: Post-Exposure Medical Care (20%)
When an exposure happens, the officer coordinates the response. Expect scenario questions about sequence and responsibility.
- Immediate steps after an exposure incident
- Medical evaluation, follow-up and what the exposed responder is offered
- Documentation and confidentiality obligations
- Source-individual considerations and timing of evaluation
Domain 1: Laws Applicable to Infection Control (15%)
This domain tests familiarity with the legal framework governing responder infection control, including how requirements shape employer duties and officer responsibilities. Focus on what each rule requires, who it protects and what employers must provide.
Domain 4: Vaccines and Immunizations (15%)
Questions cover which immunizations are relevant to responders, how employers must offer them, and how to handle declinations and documentation.
Fees, Study Guide and Total Outlay
Exam fees are $300 for NAPSICO members and $400 for nonmembers, and fees are nonrefundable. NAPSICO also offers an optional study guide at $35. Calculated subtotals look like this:
| Item | NAPSICO Member | Nonmember |
|---|---|---|
| Exam fee | $300 | $400 |
| Optional NAPSICO study guide | $35 | $35 |
| Exam plus guide subtotal | $335 | $435 |
Those subtotals exclude membership dues, any applicable tax or shipping, courses and retakes. If you are deciding whether to join NAPSICO, compare your membership dues against the exam-fee difference; the figures above let you do that math yourself. Our DICO-C certification cost breakdown walks through the budgeting in more detail.
Registration, Proctoring and Retests
Proctoring Provider
The April 2026 handbook specifies TesTrac live remote proctoring, while some IBSC and NAPSICO web pages also reference Prometric. Do not guess which applies to you. Follow the provider and delivery modality named in your current IBSC authorization when you book. Our page on DICO-C exam dates and scheduling covers timing considerations.
If You Do Not Pass
- A retest requires new registration and the full exam fee.
- At least 30 days must pass after the previous attempt.
- The standard retest rule allows three total attempts.
Because fees are nonrefundable and retakes cost the full amount, a retake is expensive. That is the strongest practical argument for completing realistic practice sets before your first attempt. For context on outcomes, see what the data shows about DICO-C pass rates.
A Domain-Weighted Study Sequence
Rather than a generic schedule, sequence your preparation around the blueprint weights. A suggested order follows, which you can compress or stretch to fit your timeline. The fuller methodology lives in our DICO-C study guide.
Laws and Vaccines (30% combined)
- Learn the regulatory framework first; it supplies the vocabulary used in every other domain.
- Pair it with immunization requirements, since both are rule-driven and reward careful reading.
Exposure Control Plan Components (30%)
- Give this domain two weeks because it is the single largest block.
- Build a sample plan on paper and compare bloodborne, TB and droplet controls side by side.
Disease Transmission and Post-Exposure Care (40% combined)
- Study transmission routes, then walk through post-exposure steps as a continuous sequence.
- Run scenario questions that start with an exposure and ask for the next correct action.
Timed Practice and Gap Repair
- Take full-length timed sets of 125 questions in 2 hours 30 minutes.
- Return to your weakest domain, weighting your time by blueprint percentage.
Key Takeaway
Review every missed practice question by asking which domain it belongs to. If misses cluster in Exposure Control Plan Components, that is where the most points are at stake, so fix it before polishing smaller domains.
Our DICO-C practice test lets you drill by domain and simulate the scenario-style, single-best-answer format. For quick review near test day, the DICO-C cheat sheet condenses the must-know facts onto one page.
Where the Credential Fits in Your Career
The people who pursue this credential are emergency responders: firefighters, paramedics and EMTs, law enforcement personnel and other public safety staff who are, or may become, their organization's infection control point person. Fire departments, EMS agencies, ambulance services and public safety departments are the natural settings. Explore realistic roles on our page about DICO-C jobs.
On compensation, be cautious. The credential does not come with a published, certification-linked pay premium. Your earnings depend mainly on your underlying emergency-response or healthcare role, your rank, your employer and your region. The sensible way to evaluate value is to compare what your current employer pays for your role and ask whether the credential supports a designated-officer assignment, a stipend your agency offers, or a promotion pathway. Our salary guide and analysis of whether the certification is worth it frame that comparison without implying a guaranteed bump.
Keeping the Credential: Three-Year Renewal
The DICO-C is valid for three years. You can renew in one of two ways:
- Retake the examination.
- Complete 18 directly relevant infection-control CE hours during the certification cycle, maintain eligibility, submit completion documentation (which is subject to audit) and pay the renewal fee.
| Renewal Detail | Requirement |
|---|---|
| Validity period | Three years |
| CE hours needed | 18 directly relevant hours |
| When to submit CE application | Two to four months before expiration |
| Late-submission fee | $125 processing fee if documentation arrives less than 30 days before expiration |
| If the credential expires | Re-examination is required |
The practical advice is to log CE hours as you earn them rather than reconstructing them at the end, and to put the two-to-four-month submission window on your calendar at the start of the cycle. Letting the credential lapse forces a full re-examination.
Frequently Asked Questions
The exam administers 125 questions in 2 hours 30 minutes. Of these, 100 are scored and 25 are unscored pilot items. You cannot tell which are which, so answer every question carefully.
The IBSC DICO-C FAQ specifies 70 correct answers among the 100 scored items. Do not calculate the requirement against all 125 administered questions.
The exam fee is $300 for NAPSICO members and $400 for nonmembers, and it is nonrefundable. The optional NAPSICO study guide is $35, bringing the calculated subtotal to $335 for members or $435 for nonmembers, before dues, tax, shipping, courses or retakes.
Exposure Control Plan Components is the largest at 30%. Disease transmission risks and post-exposure medical care carry 20% each, while laws and vaccines and immunizations carry 15% each. Weight your study time accordingly.
A retest requires new registration, the full exam fee and at least 30 days after your previous attempt, with three total attempts under the standard rule. Once certified, the credential lasts three years and can be renewed by exam or by completing 18 relevant CE hours with documentation and a renewal fee.
Whether you are preparing for the first time or planning ahead for renewal, the best next step is practicing the real question style. Start with our DICO-C exam prep practice questions and revisit the domain weights above to keep your effort proportional to where the points are.