- What DICO-C Actually Is
- Who Stands Behind the Credential
- The Infection Control Officer Role in Emergency Response
- How the Exam Is Built
- The Five Content Domains
- Eligibility, Registration, and Test-Day Rules
- What It Costs
- Sequencing Your Prep Around the Blueprint
- Keeping the Credential Active
- Career Value and Pay Context
- Frequently Asked Questions
- DICO-C stands for Certified Designated Infection Control Officer, issued by IBSC and developed with NAPSICO.
- The exam has 125 questions in 2 hours 30 minutes; only 100 are scored.
- Passing requires 70 correct answers among the 100 scored items, not 70 of 125.
- Exposure Control Plan Components is the largest domain at 30% of the blueprint.
What DICO-C Actually Is
DICO-C is the acronym for Certified Designated Infection Control Officer, a specialty credential for emergency responders who serve, or could serve, as the infection control officer for their department or agency. It validates that a candidate understands the legal framework, exposure control planning, transmission risks, immunization programs, and post-exposure care that an infection control officer is expected to manage.
Several credentials in healthcare and public safety share similar acronyms, so it is worth being precise. This article covers only the IBSC credential built for the designated infection control officer function in public safety. If you want other angles on the same topic, our pages on what DICO-C stands for and DICO-C meaning cover the terminology in more depth.
Who Stands Behind the Credential
The certification is administered by the International Board of Specialty Certification (IBSC) and was developed with the National Association of Public Safety Infection Control Officers (NAPSICO). That pairing matters. IBSC provides the certification infrastructure, while NAPSICO supplies the subject-matter grounding in public safety infection control practice.
NAPSICO membership also affects what you pay, because exam fees differ for members and nonmembers. We break the numbers down below and in our dedicated DICO-C certification cost guide.
The Infection Control Officer Role in Emergency Response
To understand why the credential exists, think about what a designated infection control officer is responsible for inside a fire department, EMS agency, law enforcement organization, or similar public safety employer. The role typically involves:
- Maintaining and updating the organization's exposure control plan
- Serving as the point of contact when a member has a potential exposure
- Coordinating immunization and screening programs for personnel
- Keeping the agency aligned with applicable laws and regulations
- Guiding post-exposure evaluation, follow-up, and documentation
That job sits at the intersection of operations, occupational health, and compliance. The DICO-C blueprint mirrors it closely, which is why the five domains read like a job description rather than an academic syllabus. For a closer look at where the credential shows up in hiring and appointments, see our overview of DICO-C jobs.
How the Exam Is Built
The format is straightforward but has one detail that trips up many candidates: the difference between administered and scored questions.
| Feature | DICO-C Detail |
|---|---|
| Total questions administered | 125 |
| Scored questions | 100 |
| Unscored pilot items | 25 |
| Time allowed | 2 hours 30 minutes |
| Question type | Four-option, single-best-answer multiple choice |
| Content style | Applied and scenario-based |
| Delivery | Computer-delivered |
| Passing standard | 70 correct among the 100 scored items |
Why the 125 vs. 100 distinction matters
The 25 pilot items are mixed in with the scored ones and are not identified for you. IBSC uses them to evaluate future questions. Because you cannot tell which are which, treat every question as if it counts. The published passing standard is 70 correct answers out of the 100 scored items; do not calculate a percentage against all 125 administered questions. Our DICO-C passing score article walks through the math and what it means for your pacing.
What "applied" looks like
Expect scenario stems: a crew member has a needlestick during a call, a department is deciding how to handle a suspected airborne disease patient, an employee declines a vaccine. You then choose the single best action or interpretation. Wrong options are usually plausible, so the exam rewards judgment calibrated to the standard of practice, not simple recall.
The handbook allows you to move backward and forward through the exam and change answers, so flagging uncertain items and returning to them is a legitimate strategy. If you want a realistic sense of the challenge, read how hard the DICO-C exam is, and for data-oriented readers there is a separate look at the DICO-C pass rate.
The Five Content Domains
The blueprint reference is the April 2026 candidate handbook, with a separately linked detailed outline dated October 7, 2020. Use both, and note that the handbook is the more recent document. Weighting should drive how you allocate your study hours.
| 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 heart of the exam and the single largest block. You need to know what a written exposure control plan contains and how it is applied for bloodborne, tuberculosis, and other airborne or droplet-transmitted diseases.
- How exposure determination and risk classification work for different job duties
- Engineering controls, work practice controls, and personal protective equipment
- Training, recordkeeping, and plan review responsibilities
- Differences between bloodborne and airborne/droplet precautions
Domain 3: Risks for Disease Transmission (20%)
Here the exam tests whether you understand how pathogens move and which responder activities create risk.
- Modes of transmission and the chain of infection
- High-risk tasks and situations in the field
- Why some exposures carry more risk than others
Domain 5: Post-Exposure Medical Care (20%)
When an exposure happens, the infection control officer drives the response. Expect scenarios requiring the correct sequence of actions.
- Immediate first aid and reporting steps after an exposure
- Medical evaluation, testing, and follow-up
- Confidentiality and documentation obligations
Domain 1: Laws Applicable to Infection Control (15%)
This domain covers the legal and regulatory expectations that shape an agency's program. Focus on what each requirement obligates the employer and the infection control officer to do in practice.
Domain 4: Vaccines and Immunizations (15%)
Know which immunizations are relevant to responders, how programs are offered and documented, and how declinations are handled.
For a deeper domain-by-domain treatment, see the complete guide to all five DICO-C content areas.
Eligibility, Registration, and Test-Day Rules
Who can sit the exam
Eligibility is built around role. Candidates must be emergency responders who are working as, or have the potential to work as, an Infection Control Officer, and they must have an approved examination application and government-issued identification. Notice what is absent: the eligibility description does not hinge on a specific course prerequisite. Whatever your employer demands for appointment is a separate question. Details are in our DICO-C requirements guide.
Proctoring and exam conditions
Provider details deserve care. The April 2026 handbook specifies TesTrac live remote proctoring, while IBSC and NAPSICO web pages also reference Prometric. Do not guess: follow the provider and modality listed in your own IBSC authorization when you book. Scheduling windows and deadlines are covered in DICO-C exam dates.
- The exam is closed-book and identity-checked
- No notes, books, outside assistance, or unauthorized electronics are permitted
- Remote sessions use audio and video monitoring
- Accommodations require supporting documentation and approval, so request them early
Results and retesting
The DICO-C FAQ states that results are available within one hour. If you do not pass, a retest requires new registration, full exam fees, and at least 30 days after your previous attempt. Under the standard retest rule, you get three total attempts.
What It Costs
| Item | NAPSICO Member | Nonmember |
|---|---|---|
| Exam fee (nonrefundable) | $300 | $400 |
| Optional NAPSICO study guide | $35 | $35 |
| Exam plus guide subtotal | $335 | $435 |
Those subtotals exclude membership dues, applicable tax or shipping, courses, and retakes. Because every retest requires full exam fees again, a thorough first-attempt preparation plan is the most effective way to control total spend. The full breakdown lives in our pricing guide.
Sequencing Your Prep Around the Blueprint
Weighting should dictate the order and the time you give each domain. Domain 2 deserves the most hours, but it also depends on the transmission concepts in Domain 3, so a sensible plan builds foundations first. Here is a sample sequence; adjust the duration to your own schedule and experience.
Transmission Risks and Legal Framework
- Study modes of transmission and high-risk responder tasks (Domain 3)
- Map the key laws to employer and officer duties (Domain 1)
Exposure Control Plan Components
- Work through plan elements for bloodborne, TB, and airborne/droplet diseases (Domain 2)
- Practice distinguishing precautions by pathogen type
Immunizations and Post-Exposure Care
- Review vaccine programs and declination handling (Domain 4)
- Rehearse post-exposure sequences end to end (Domain 5)
Timed Practice and Weak-Spot Repair
- Take a full timed DICO-C practice test under exam conditions
- Revisit the domains where you missed scenario questions
Scenario practice matters more than flashcards here, since the real exam asks you to choose the single best action. Our DICO-C study guide expands on resources and pacing, and the DICO-C cheat sheet is useful for a last-day review. When you are ready to test yourself, try the DICO-C practice questions on the main site.
Keeping the Credential Active
The certification is valid for three years. You can renew in one of two ways:
- Re-examination by passing the exam again
- 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
Timing is the detail people miss. Submit your CE-renewal application two to four months before expiration. Documentation submitted less than 30 days before expiration incurs a $125 processing fee. If the credential expires, re-examination is required, which means starting over with full exam fees.
Key Takeaway
Track your CE hours from day one of the cycle and set a calendar reminder for four months before expiration. Early submission avoids the $125 late-processing fee and the risk of lapsing into mandatory re-examination.
Career Value and Pay Context
DICO-C holders typically work in the emergency response and public safety space: fire and rescue, EMS, law enforcement, and related agencies where someone must own the infection control function. The credential signals documented competence in exposure control, compliance, and post-exposure management, which can support your case when an employer is choosing a designated officer.
On compensation, be cautious. Pay is driven mainly by your underlying role, rank, location, and employer rather than by the certification alone, and there is no reliable basis for assuming a pay premium tied to DICO-C specifically. A better approach is to compare earnings for your current emergency-response or healthcare position and then weigh the credential as a way to expand responsibilities or qualify for an infection control assignment. For more on this, read our DICO-C salary guide and the analysis of whether the certification is worth it. If you are still orienting yourself, what is DICO-C certification offers a gentler starting point.
Frequently Asked Questions
DICO-C stands for Certified Designated Infection Control Officer. It is issued by the International Board of Specialty Certification (IBSC) and was developed with the National Association of Public Safety Infection Control Officers (NAPSICO) for emergency responders in an infection control officer role.
The exam administers 125 questions in 2 hours 30 minutes, but only 100 are scored; the other 25 are unscored pilot items. IBSC specifies a passing score of 70 correct answers among the 100 scored items.
Exposure Control Plan Components for Bloodborne Pathogens, TB, and other Airborne/Droplet Transmitted Diseases is the largest at 30%. Risks for Disease Transmission and Post-Exposure Medical Care are 20% each, while Laws and Vaccines and Immunizations are 15% each.
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, before dues, tax, shipping, courses, or retakes.
The credential lasts three years. You can renew by re-examination or by completing 18 directly relevant infection-control CE hours, documenting them for audit, and paying the renewal fee. Apply two to four months early to avoid a $125 fee for submissions under 30 days before expiration.