100+ Free CDDN Practice Questions
Pass your Certified Developmental Disabilities Nurse exam on the first try — instant access, no signup required.
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Key Facts: CDDN Exam
30%
Health Assessment Weight
Largest domain
~$300
Exam Fee
DDNA
5 yrs
Certification Validity
DDNA
50-70 hrs
Study Time
Recommended
6
Content Domains
DDNA
RN
License Required
Active unrestricted
The CDDN (Certified Developmental Disabilities Nurse) exam is administered by DDNA and covers multiple-choice questions in a computer-based format. The exam tests six content domains: Health Assessment/Management (30%), Behavior Support/Mental Health (20%), Legal/Ethical/Advocacy (15%), Health Promotion (15%), Care Coordination (10%), and Professional Development (10%). Key topics include seizure management, psychotropic medication monitoring, person-centered planning, and genetic syndromes such as Down syndrome and autism spectrum disorder.
About the CDDN Exam
The CDDN certification demonstrates your specialized knowledge in developmental disabilities nursing, including health assessment, behavioral support, person-centered planning, legal/ethical advocacy, and care coordination for individuals with intellectual and developmental disabilities.
Questions
150 scored questions
Time Limit
3 hours
Passing Score
Criterion-referenced pass/fail
Exam Fee
~$300 (DDNA)
CDDN Exam Content Outline
Health Assessment/Management
Physical assessment adaptations, medication management, seizure care, dysphagia, chronic conditions
Behavior Support/Mental Health
Functional behavior assessment, positive behavioral support, psychotropic monitoring, de-escalation
Legal/Ethical/Advocacy
Guardianship, consent, abuse recognition, patient rights, ADA, self-determination
Health Promotion/Disease Prevention
Preventive screenings, nutrition, exercise safety, dental health, immunization
Care Coordination/Communication
Person-centered planning, transition services, communication strategies, family support
Professional Development
Evidence-based practice, documentation standards, staff education, quality improvement
How to Pass the CDDN Exam
What You Need to Know
- Passing score: Criterion-referenced pass/fail
- Exam length: 150 questions
- Time limit: 3 hours
- Exam fee: ~$300
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
CDDN Study Tips from Top Performers
Frequently Asked Questions
What is the CDDN certification?
The CDDN (Certified Developmental Disabilities Nurse) is a specialty nursing certification administered by the Developmental Disabilities Nurses Association (DDNA). It validates expertise in caring for individuals with intellectual and developmental disabilities across the lifespan, covering health assessment, behavioral support, advocacy, and person-centered care.
What topics are on the CDDN exam?
The CDDN exam covers six content domains: Health Assessment/Management (30%) including seizures, dysphagia, and medication monitoring; Behavior Support/Mental Health (20%) including FBA and PBS; Legal/Ethical/Advocacy (15%); Health Promotion (15%); Care Coordination (10%); and Professional Development (10%). Genetic syndromes like Down syndrome, autism, and cerebral palsy are heavily represented.
How do I become eligible for the CDDN exam?
CDDN eligibility requires an active, unrestricted RN license and clinical experience in developmental disabilities nursing. The exam fee is approximately $300 and the certification is valid for 5 years. Check DDNA's website for specific hour and experience requirements.
How long should I study for the CDDN exam?
Plan for 50-70 hours of study over 5-8 weeks. Prioritize Health Assessment/Management (30% of the exam), then Behavior Support/Mental Health (20%). Complete at least 100 practice questions and score consistently above 80% on practice tests before taking the exam.
What conditions should I know for the CDDN exam?
Key conditions include Down syndrome (cardiac, thyroid, AAI, early Alzheimer's), autism spectrum disorder (sensory processing, communication), cerebral palsy (spasticity, dysphagia, scoliosis), Prader-Willi syndrome (hyperphagia), Fragile X syndrome, Angelman syndrome, Rett syndrome, and fetal alcohol spectrum disorders. Know the unique health needs and nursing considerations for each.