- The Dermatology Nurse Certified exam sorts content into three practice areas: General Dermatology 55%, Surgical Dermatology 30%, Phototherapy 15%.
- The exam has 175 multiple-choice questions and runs approximately four hours.
- Patient-problem and nursing-objective percentages are overlapping views of the same exam; never add them to the domain weights.
- Infections and Tumors/Malignancies are the heaviest patient-problem categories, at 15% each.
How the DNC Exam Is Organized
The Dermatology Nurse Certified (DNC) credential is issued by the Dermatology Nursing Certification Board (DNCB) under the Dermatology Nurses' Association (DNA). Registration runs through C-NET, and PSI provides the testing. If you are new to the credential itself, start with What Is DNC Certification? and then return here for the content breakdown.
The exam's content is classified by dermatology nursing practice area into three domains. These are the official classification lines, not chapters from a preparation course, so treat them as a map of where the exam draws its questions rather than a syllabus order.
| Domain | Weight | Relative Emphasis |
|---|---|---|
| Domain 1: General Dermatology | 55% | Largest share; roughly every other question |
| Domain 2: Surgical Dermatology | 30% | Nearly one question in three |
| Domain 3: Phototherapy | 15% | Smallest share, but still a meaningful block of questions |
Domain 1: General Dermatology (55%)
More than half of your score comes from this domain, which makes it the single most important area of preparation. General Dermatology covers the clinical conditions you assess, monitor and educate patients about across the spectrum of dermatology nursing practice. The DNA publishes a separate patient-problem distribution that shows which conditions carry the most weight, and it is the best guide to how to spend your time within this domain.
Domain 1: General Dermatology (55%)
Expect scenario-based questions that ask what a nurse should assess, recognize, teach or escalate for a given skin condition.
- Infections (bacterial, viral, fungal) are among the heaviest patient-problem categories at 15%
- Dermatitis and papulosquamous disorders each carry 13%, so eczema-type and psoriasis-type presentations deserve serious review
- Hypersensitivities, vasculitis and infestations together account for 7%
- Acne and rosacea, wounds and ulcers, and hair and nails each sit around 5%
- Bullous and immune disorders represent 4%, and a miscellaneous group makes up 3%
Where Candidates Lose Points in General Dermatology
Because this domain is broad, the risk is not ignorance of any one condition but confusion between look-alikes. Questions often hinge on distinguishing similar presentations, selecting the appropriate patient teaching, or identifying which finding warrants prompt escalation. Build comparison charts for conditions that resemble one another, and practice stating the nursing action that follows from each finding.
For a consolidated list of the facts you should be able to recall quickly, see the DNC Cheat Sheet, and for a full preparation plan see the DNC Study Guide.
Domain 2: Surgical Dermatology (30%)
Surgical Dermatology accounts for 30% of the exam. Dermatology nurses working in procedural and surgical settings support excisions, biopsies and related procedures, so this domain tests the nursing role around those procedures rather than the surgeon's technique. It also connects directly to the Tumors/Malignancies patient-problem category, which carries 15% of the exam on its own.
Domain 2: Surgical Dermatology (30%)
Think of this domain as the nurse's responsibilities before, during and after a dermatologic procedure.
- Preparing and positioning the patient and the procedural environment
- Understanding what is being sampled or removed and why, especially for suspected malignancies
- Wound care, dressing selection and postoperative instructions
- Recognizing complications and knowing when to notify the provider
- Patient education on healing expectations, activity limits and follow-up
Connecting Surgical Questions to Patient Problems
Candidates often study surgery in isolation and miss that the exam blends it with condition knowledge. A question may present a lesion, ask what it likely represents, and then ask for the correct nursing response before or after a procedure. Review skin cancer types alongside the procedures used to diagnose and treat them, and tie wound and ulcer care (a 5% patient-problem category) to postoperative management.
Domain 3: Phototherapy (15%)
Phototherapy is the smallest domain at 15%, which tempts candidates to skip it. That is a mistake: a meaningful number of questions still come from this area, and it is often where experienced nurses from non-phototherapy clinics have the thinnest knowledge. If your practice setting does not offer light-based treatment, plan extra study time here, because you cannot lean on daily clinical exposure.
Domain 3: Phototherapy (15%)
Focus on the nursing role in light-based treatment: patient selection, safety, monitoring and education.
- Which skin conditions are commonly treated with phototherapy and why
- Patient screening, including medications and conditions that raise photosensitivity risk
- Protective measures for the patient and staff during treatment
- Monitoring for expected responses and adverse effects such as burning
- Teaching patients about treatment schedules, sun avoidance and skin checks
Phototherapy also overlaps with the Photosensitivity/Photodamage patient-problem category, which carries 9% of the exam. Studying how light interacts with the skin, both therapeutically and harmfully, strengthens your answers in both places.
Two Overlapping Classifications You Should Not Add Up
The DNA publishes the exam content in more than one way, and this is the most common source of confusion for candidates building a study plan. Besides the three practice-area domains, there is a patient-problem distribution and a nursing-objective classification. These are different slices of the same 175 questions, not additional domains.
| Classification | Categories and Weights |
|---|---|
| Practice area (the three domains) | General Dermatology 55%; Surgical Dermatology 30%; Phototherapy 15% |
| Patient problem | Infections 15%; Tumors/Malignancies 15%; Dermatitis 13%; Papulosquamous Disorders 13%; Photosensitivity/Photodamage 9%; Hypersensitivities, Vasculitis, Infestations 7%; Pigmentation/Vascular Disorders 6%; Hair and Nails 5%; Acne and Rosacea 5%; Wounds and Ulcers 5%; Bullous and Immune Disorders 4%; Miscellaneous 3% |
| Nursing objective | Assessment/monitoring 30%; planning, administering and monitoring interventions 30%; educational, health-promotion and psychosociocultural strategies 29%; care coordination 11% |
What the Nursing-Objective Split Tells You
The nursing-objective weights reveal how the exam thinks. Assessment and monitoring, and planning and intervention, each carry 30%, while educational, health-promotion and psychosociocultural strategies carry 29%. That near-equal split means patient teaching is not an afterthought. Expect many questions to ask what you would say to a patient or family, how you would adapt teaching to cultural or psychosocial circumstances, or how you would reinforce adherence. Care coordination is the smallest at 11%, but it still appears.
Exam Format, Fees and Scheduling
Knowing the domains is only part of readiness. You also need to understand how the exam is delivered and what it takes to sit for it.
- Format: 175 multiple-choice questions, lasting approximately four hours.
- Passing criterion: The DNA brochure describes approximately 75% correct as the passing criterion. That is not a guaranteed fixed raw cutoff, and it is not a candidate pass rate. For more on this, see DNC Passing Score and DNC Pass Rate.
- Initial fee: USD $260 for DNA members and $335 for nonmembers, including a $25 nonrefundable application amount.
- Retake: One reduced-fee retake after the first unsuccessful attempt is $195 for members and $270 for nonmembers, within one year. A further attempt requires a new application and the full fee.
- Scheduling: Applications are accepted year-round, and PSI provides a 90-day testing window. Use the authorization you are issued for the actual booking, since older handbook wording about fixed testing months is superseded by current C-NET guidance.
For the full financial picture, including membership trade-offs, read DNC Certification Cost, and for scheduling specifics see DNC Exam Dates.
Eligibility in Brief
You need a current unrestricted RN license in the United States or Canada, at least two years of dermatology nursing experience as an RN, and 2,000 dermatology practice hours during the preceding two years. Staff, administrative, teaching and research work can qualify. The details are covered in DNC Requirements.
Maintaining the Credential
Certification lasts three years. Renewal requires qualifying RN licensure and dermatology experience, an application and fee, plus either reexamination or 45 continuing-education contact hours during the cycle, including at least 30 dermatology hours. The DNCB specifies a December 31 expiration, while C-NET summarizes validity as three years from passing, so the expiration date on your issued certificate controls. Renewal fee labels on the DNA site and the linked packet conflict, so confirm the applicable route and charge directly before you pay.
Sequencing Your Preparation by Domain Weight
This is the one place for a study schedule, and it is built around the blueprint rather than generic habits. The logic: start with the largest, broadest domain so you have the most time to absorb it, keep surgical content linked to malignancy review, and place phototherapy where it can be revisited close to the exam.
General Dermatology: Infections, Dermatitis, Papulosquamous
- Cover the highest-weight patient-problem categories first
- Build look-alike comparison charts and pair each condition with its nursing teaching points
General Dermatology: remaining categories
- Hypersensitivities, pigmentation, hair and nails, acne and rosacea, bullous disorders
- Take a mixed practice set to check retention of weeks 1-3
Surgical Dermatology and Malignancies
- Study skin cancers alongside diagnostic and treatment procedures
- Review wound and ulcer care and postoperative teaching
Phototherapy, then full review
- Cover treatment indications, screening, safety and photosensitivity
- Finish with timed, full-length practice under realistic conditions
Key Takeaway
Match your hours to the weights, but do not neglect the smallest domain. Use the nursing-objective view as a filter on every topic: for each condition, be able to assess it, intervene on it, teach about it and coordinate care for it. You can check your readiness with the practice questions on the main practice test site.
If you are weighing how demanding this plan is against your own background, How Hard Is the DNC Exam? offers a frank look at difficulty, and Is the DNC Certification Worth It? and the DNC Salary Guide help you decide whether the investment fits your career goals.
Frequently Asked Questions
There are three: General Dermatology (55%), Surgical Dermatology (30%) and Phototherapy (15%). The patient-problem and nursing-objective lists are separate classifications of the same exam, not extra domains.
The DNA certification page references the 2023 examination update and does not describe a verified new 2026 blueprint. Confirm current content details with the DNA and C-NET before testing.
Infections and Tumors/Malignancies each account for 15%, followed by Dermatitis and Papulosquamous Disorders at 13% each. Together these four categories make up a large share of the exam, so prioritize them.
The exam has 175 multiple-choice questions and lasts approximately four hours. The brochure describes approximately 75% correct as the passing criterion, though it is not a guaranteed fixed raw cutoff.
No. They are overlapping ways of classifying the same questions. Each classification independently covers the whole exam, so combining them would double- and triple-count content.