- What Is the CPH Exam?
- Question Format and Structure
- Time Limit and Pacing
- Scoring Scale and Passing Score
- The 10 Content Domains (Equally Weighted)
- Registration, Fees, and Bundles
- Testing Delivery Options
- Mapping Your Study Schedule to CPH Domains
- After You Pass: Certification and Renewal
- Frequently Asked Questions
- The CPH exam contains 200 multiple-choice questions (175 scored, 25 unscored pretest items) with a 4-hour time limit.
- Passing requires a scaled score of 500 on a 300-800 scale, a standard implemented in August 2024.
- All 10 content domains are equally weighted at 10% each - no single domain can carry you.
- Exam bundles range from $385 (standard) to $535 (All the Goods, including retake, TestRun, and APHA study guide).
What Is the CPH Exam?
The Certified in Public Health (CPH) credential is governed by the National Board of Public Health Examiners (NBPHE) and is widely recognized as the standard professional certification for public health practitioners. It signals to employers - health departments, federal agencies, nonprofits, academic medical centers, and global health organizations - that you have demonstrated broad, contemporary public health competency.
If you are completing or have completed an MPH or equivalent degree from a CEPH-accredited program, or if you meet the qualifying professional public health experience requirements, you are eligible to sit. Once the NBPHE approves your application, that eligibility does not expire - you can schedule the exam on your own timeline, year-round.
Question Format and Structure
Every question on the CPH exam is a single best answer multiple-choice item. There are no complex mathematical calculations, no essay responses, and no partial-credit items. The exam presents a scenario, a piece of data, or a concept and asks you to select the one best answer from the choices provided.
Scored vs. Unscored Questions
Of the 200 total questions, 175 are scored and 25 are unscored pretest items. The NBPHE embeds these pretest questions to evaluate whether they perform well enough to appear on future scored versions of the exam. You will not know which items are pretest questions, so treat every question as if it counts.
This structure has an important implication for your preparation: because you cannot identify the 25 unscored items, you cannot afford to mentally "skip" any topic area. A question on Environmental and Occupational Health that feels difficult could be scored - or it could be a pretest item that does not affect your result. You have no way to tell.
Question Style in Practice
CPH questions frequently present a public health scenario - a disease outbreak, a community needs assessment, a policy proposal, a communications challenge - and ask you to apply domain knowledge to make a decision or identify the best next step. This applied, scenario-based format rewards candidates who have practiced working through realistic problems, not just those who have memorized definitions.
That is why working through CPH-specific practice questions is so valuable. You can start a free CPH practice test right now to get a sense of how these questions are structured before you commit to a full study plan.
Time Limit and Pacing
You have 4 hours to complete the exam. With 200 questions, that works out to an average of 72 seconds per question. In practice, many questions will take you 30-45 seconds, while a handful of complex scenario-based items may take 90 seconds or more. The time limit is generous enough that most candidates can review flagged items if they pace steadily from the start.
A practical pacing checkpoint: aim to reach question 100 by the 2-hour mark. If you are ahead of that pace, you have buffer for review. If you are behind, increase your tempo - do not allow yourself to stall on a single difficult item when 99 others remain.
Scoring Scale and Passing Score
Since August 2024, the CPH exam uses a scaled scoring system ranging from 300 to 800. The passing score is 500. This scaled score accounts for minor variations in question difficulty across different exam forms, ensuring that a passing score on one version of the exam represents the same level of competency as a passing score on any other version.
| Scoring Element | Detail |
|---|---|
| Total Questions | 200 |
| Scored Questions | 175 |
| Unscored Pretest Items | 25 |
| Time Limit | 4 hours |
| Score Scale | 300-800 |
| Passing Score | 500 |
| Scoring Model Implemented | August 2024 |
| Domain Weighting | 10% each (10 domains) |
The NBPHE does not publicly disclose pass rates, so it is not possible to benchmark your preparation against a known cut-score percentage. Focus on building genuine competency across all 10 domains rather than trying to game a pass-rate estimate.
The 10 Content Domains (Equally Weighted)
The CPH content outline was updated on August 1, 2024, following a Job Task Analysis conducted every five to seven years. This analysis surveys practicing public health professionals to identify the knowledge and skills most relevant to contemporary practice. The result is a 10-domain framework - each domain contributing exactly 10% of your scored questions.
Equal weighting is a defining feature of the CPH exam. There is no "high-yield" domain you can over-index on. Neglecting Biostatistics because it feels hard costs you just as much as neglecting Communication because it feels easy.
Domain 1: Evidence-based Approaches to Public Health
Candidates must understand how to identify, appraise, and apply evidence to public health decision-making. This includes systematic reviews, program evaluation frameworks, and translating research into practice.
- Types and hierarchy of evidence
- Needs assessments and community health assessments
- Program planning models (e.g., logic models, PRECEDE-PROCEED)
Domain 5: Health Equity and Social Justice
This domain reflects the profession's increasing emphasis on structural determinants of health. Candidates must understand how race, class, gender, geography, and power shape health outcomes - and how public health interventions can address those disparities.
- Social determinants of health frameworks
- Structural racism and historical context
- Health equity metrics and disparity measurement
Domain 7: Public Health Biology and Epidemiology
This domain covers the biological and epidemiological foundations of public health practice - disease transmission, natural history, outbreak investigation, and population-level measures of frequency and association.
- Measures of disease frequency (incidence, prevalence, mortality rates)
- Study designs (cohort, case-control, cross-sectional, RCT)
- Bias, confounding, and effect modification
Domain 9: Biostatistics
Candidates must be able to interpret statistical output, select appropriate tests, and reason through data quality issues - without complex hand calculations. Focus on conceptual understanding over formula derivation.
- Hypothesis testing and p-values
- Confidence intervals and their interpretation
- Regression, correlation, and survival analysis concepts
The remaining six domains - Communication, Leadership, Law and Ethics, Community and Partner Engagement, Health Policy and Management, and Environmental and Occupational Health - each carry the same 10% weight. If your graduate training emphasized clinical epidemiology, you may need to allocate extra preparation time to Law and Ethics or Community and Partner Engagement, which receive less emphasis in some MPH curricula.
For a detailed breakdown of how these domains map to specific exam content, the CPH Exam Format 2026 overview on this site walks through each area with study guidance.
Registration, Fees, and Bundles
The NBPHE offers several registration options. The standard exam fee is $385. If you want built-in protection against a retake - or access to additional study resources - three bundles are available:
| Bundle | Price | What's Included |
|---|---|---|
| Standard | $385 | Exam registration only |
| Take Two | $435 | Exam + free retake |
| Prepped and Ready | $485 | Exam + retake + 3-month TestRun subscription |
| All the Goods | $535 | Exam + retake + TestRun + practice exam + APHA study guide |
If you purchase a retake separately after an unsuccessful attempt, the fee is $150. That makes the Take Two bundle ($50 premium over standard) an economically rational choice for most candidates - it halves the financial consequence of needing a second attempt.
Additionally, more than 50 affiliated organizations, schools, and programs have negotiated partnership discounts with the NBPHE. Check whether your institution or professional association qualifies before registering at the standard rate.
Testing Delivery Options
The CPH exam is administered by Meazure Learning through two delivery modes: live-online remote proctoring (take the exam from home or office using your own computer) or in-person at a computer-based testing center. Both modes deliver the same exam content and are available year-round.
Remote proctoring requires a stable internet connection, a webcam, and a private testing environment. If you opt for a testing center, Meazure Learning's network of locations provides a controlled environment that some candidates find preferable for minimizing distractions.
Mapping Your Study Schedule to CPH Domains
Because all 10 domains carry equal weight, a structured rotation is more effective than concentrating on your strongest areas. The following 10-week framework assigns one domain per week, sequencing the more conceptually dense domains early when cognitive load is highest, and revisiting weaker areas in a second pass during weeks 9-10.
Domain 7: Public Health Biology and Epidemiology
- Review study designs, measures of association, outbreak investigation steps
- Practice interpreting 2x2 tables and calculating odds ratios conceptually
Domain 9: Biostatistics
- Focus on interpretation of p-values, confidence intervals, and regression outputs
- Work through scenario-based practice questions - no formula memorization drills
Domain 1: Evidence-based Approaches
- Study program evaluation models (logic models, RE-AIM framework)
- Review systematic review methodology and levels of evidence
Domain 10: Environmental and Occupational Health
- Review toxicology basics, exposure pathways, and risk assessment frameworks
- Study occupational health regulations and key environmental health laws
Domain 4: Law and Ethics
- Review public health law foundations, police power, and landmark cases
- Study ethical frameworks - beneficence, autonomy, justice - applied to public health scenarios
Domain 8: Health Policy and Management
- Study the policy development cycle, agenda-setting, and implementation science basics
- Review public health financing, Medicaid/Medicare structure, and ACA provisions
Domain 5: Health Equity and Social Justice
- Master social determinants frameworks (Dahlgren-Whitehead, CDC's SDOH model)
- Practice identifying structural barriers in case-based scenarios
Domains 2, 3, and 6: Communication, Leadership, Community Engagement
- Review health literacy principles and risk communication frameworks
- Study leadership theories and community-based participatory research methods
Full-Length Practice and Weak Domain Review
- Complete full-length timed practice exams to simulate the 4-hour format
- Use scored results to identify your two lowest-performing domains and do a targeted second pass
- Review all flagged questions; revisit any domain scoring below your average
Spaced repetition works particularly well for high-volume content domains like Public Health Biology and Biostatistics - revisiting those concepts in short daily sessions during weeks 5-8 reinforces retention without requiring full re-study sessions. The key is tying every review session to a CPH-specific domain, not generic public health content.
CPH Exam Prep's practice test platform lets you filter questions by domain, making it straightforward to target your weakest areas in weeks 9 and 10.
After You Pass: Certification and Renewal
CPH certification is valid for 5 years from the date of credentialing. To renew, you must complete 50 CPH continuing education contact hours within that five-year window. These hours must align with CPH competencies - the same 10-domain framework that structures the exam itself.
For a complete breakdown of which activities qualify, how to track your hours, and common renewal pitfalls, see the article on CPH Continuing Education Requirements for Recertification. Planning your CE strategy before you pass - not after - ensures you do not scramble in year four.
Key Takeaway
Start logging CPH-qualifying continuing education activities from day one of your certification period. Fifty hours spread over five years is manageable; fifty hours compressed into the final six months is stressful and limits your options for high-quality learning experiences.
Frequently Asked Questions
The CPH exam consists of 200 multiple-choice questions and has a 4-hour time limit. Of those 200 questions, 175 are scored and 25 are unscored pretest items that do not affect your result. You will not be told which questions are pretest items.
Since August 2024, the CPH exam uses a scaled score from 300 to 800. The passing score is 500. This scaled scoring system adjusts for minor differences in difficulty across exam forms, so a passing score always represents the same standard of competency.
Yes. The exam is administered by Meazure Learning and is available via live-online remote proctoring, which allows you to test from home using your own computer, webcam, and a stable internet connection. In-person computer-based testing centers are also available for those who prefer a controlled facility environment.
The standard exam fee is $385. Three bundles are available: Take Two at $435 (includes a free retake), Prepped and Ready at $485 (adds a 3-month TestRun subscription), and All the Goods at $535 (adds a practice exam and the APHA study guide). A standalone retake purchased separately costs $150. More than 50 affiliated organizations also offer partnership discounts.
Yes. Each of the 10 content domains - updated as of August 1, 2024, based on a Job Task Analysis - is weighted at exactly 10% of scored questions. There is no single domain that carries more weight than another, which means candidates must prepare thoroughly across all areas rather than focusing heavily on any one subject.
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