CNA certification exam guide: what's on it, how to register, and how to pass

After completing CNA training, one step stands between you and your state nurse aide registry listing: the state competency exam. This two-part test — a written knowledge section and a hands-on clinical skills evaluation — is how states verify that CNA graduates can safely perform direct patient care. Most candidates who prepare methodically pass on their first attempt.

Here is what the exam covers, how to register, what to expect on test day, and what your options are if you don’t pass.

At a glance: CNA state competency exam

What the NNAAP covers

The NNAAP is developed by Pearson VUE and used by most states with minor modifications. It is organized around six content domains. Understanding these domains tells you exactly where to focus your preparation time.

Domain 1: physical care skills

This is the largest domain and the one most candidates spend the most time on. It covers:

• Activities of daily living (ADLs): bathing, dressing, grooming, oral care, toileting, feeding, mobility
• Basic restorative services: range-of-motion exercises, positioning, ambulation, use of assistive devices
• Safety and emergency procedures: fall prevention, responding to choking, fire safety including the RACE and PASS mnemonics, use of call lights and bed alarms
• Infection control: hand hygiene technique, standard precautions, personal protective equipment (PPE), isolation procedures

The skills section of the exam draws almost exclusively from this domain. Every skill has a precise set of required steps — missing a “critical element” (such as performing hand hygiene before starting or raising side rails after repositioning) results in automatic failure of that skill, regardless of how well everything else goes.

Domain 2: psychosocial care skills

CNAs spend significant time supporting residents’ emotional and social wellbeing. This domain covers:

• Effective communication with residents, families, and the care team
• Respecting residents’ rights under federal law (OBRA 1987)
• Responding to behavioral expressions of dementia and cognitive impairment
• Understanding grief, loss, and end-of-life care
• Supporting cultural and religious preferences

Domain 3: role of the nurse aide

This domain covers what CNAs are legally and professionally permitted to do — and what they are not. Key content includes:

• Scope of practice and supervision requirements
• Mandatory reporting obligations (abuse, neglect, exploitation)
• Legal and ethical considerations including confidentiality
• Proper documentation and reporting to the supervising nurse

Domain 4: member of the health care team

Covers the CNA’s role within the broader interdisciplinary team:

• Communication with nursing staff, physical therapists, occupational therapists, and dietary
• Understanding care plans and care plan meetings
• Professional behavior and workplace conduct

Domain 5: promotion of safety

This domain overlaps with Domain 1 but focuses specifically on safety systems:

• Proper body mechanics to protect residents and the CNA
• Use of restraints (understanding OBRA restrictions on restraint use)
• Environmental safety and hazard identification
• Disaster and emergency preparedness

Domain 6: promotion of function and health of residents

The smallest domain. Covers health promotion concepts including nutrition basics, hydration monitoring, skin integrity, and supporting residents in maintaining independence.

How to register for the CNA state exam

Step 1: confirm eligibility

You must complete a state-approved CNA training program before you can register for the exam. Your school or training program will typically issue a certificate of completion. Some states require the training program to submit completion records directly to the testing vendor — ask your program coordinator what the process is in your state.

Step 2: identify your state’s testing vendor

Most states contract with one of three vendors:

• Prometric — used in roughly half of US states, including California, Texas, and Florida
• Pearson VUE — used in many Northeastern and Midwestern states
• State-specific contractors — some states (including New York and Illinois) use their own vendors or have unique registration processes

Your training program should tell you which vendor administers the exam in your state. You can also check your state’s health department or nurse aide registry website.

Step 3: create an account and register

Visit the vendor’s website and create a candidate account. You will need:

• Your legal name as it appears on your government-issued ID
• Your training program’s name and completion date
• A valid email address
• Payment for the exam fee

Most vendors allow you to select your preferred exam location and date during registration. Prometric and Pearson VUE both have scheduling tools on their websites.

Step 4: wait for authorization

In some states, you must receive an Authorization to Test (ATT) letter before you can schedule your exam. This is issued after the testing vendor verifies your training completion. ATT processing takes 1–4 weeks depending on the state.

Step 5: prepare your ID

On exam day, you need two forms of ID: one government-issued photo ID (driver’s license, passport, state ID) and one secondary form with your name and signature. The name on both must match your registration exactly.

Test day: what to expect

Written (or oral) knowledge test

The written exam is typically delivered on a computer at a Prometric or Pearson VUE testing center. Candidates who cannot read at a sixth-grade level or who have documented disabilities may request an oral version administered by the proctor.

You will receive 60–70 multiple-choice questions. Questions are scenario-based: you are given a situation involving a resident and asked what the correct CNA response is. There is no penalty for guessing.

Most states allow around 90 minutes for the written section. Time is rarely a problem — most candidates finish in 45–60 minutes.

Clinical skills evaluation

The skills section is conducted separately, usually at a testing center equipped with a hospital bed, mannequin, and standard supplies. A trained evaluator observes as you perform 3–5 randomly selected skills from the list of testable skills.

The evaluator follows a standardized checklist. Before and after every skill, you will be expected to:

• Introduce yourself and address the resident by name
• Explain what you are about to do
• Perform hand hygiene
• Ensure privacy and dignity
• Return the resident to a position of comfort
• Lower the bed and raise side rails as appropriate
• Report and record (verbally indicate you would chart the procedure)

These “wrappers” are critical elements. Missing them is grounds for failing the skill even if the technique itself was flawless.

Common testable skills include:

• Hand washing
• Indirect bed making / occupied bed making
• Nail care
• Denture care
• Mouth care for an unconscious or dependent resident
• Perineal care
• Catheter care
• Range-of-motion exercises (passive)
• Ambulating with a gait belt
• Transferring with a mechanical lift
• Measuring and recording vital signs (blood pressure, pulse, respirations, temperature)
• Measuring and recording weight
• Measuring and recording fluid intake and output

Pass rates and what they mean

Nationally, first-attempt pass rates run around 80–85% for the written exam and 70–75% for the skills evaluation. The skills section trips up more candidates because of critical element failures — small procedural missteps that would represent genuine safety errors in real patient care.

Pass rates vary by state and by training program. Programs with strong clinical simulation labs and skills practice days consistently produce higher pass rates.

Tips to pass the CNA exam

Written exam:

• Study the NNAAP candidate handbook for your state — it lists every domain and the approximate percentage of questions from each area. Prioritize Domain 1 (physical care skills) since it is the largest.
• Practice with multiple-choice question sets from CNA prep books or online platforms. The question style is very specific: always ask what the CNA should do first, or what the appropriate response is to a specific resident situation.
• Pay attention to residents’ rights questions. OBRA 1987 created specific federal rights for nursing home residents, and these appear regularly on the exam.
• When in doubt, choose the answer that prioritizes resident safety and dignity.

Skills exam:

• Practice every testable skill until the procedure is automatic. You should be able to perform hand washing, gait belt transfers, and vital signs measurement without looking at a checklist.
• Narrate as you go. Talk through what you’re doing as if you’re speaking to the resident and evaluator simultaneously. “I’m going to perform hand hygiene before I begin…”
• Never skip the wrapper steps. The most common reason for skills failure is missing hand hygiene at the start or at the end, or forgetting to lower the bed and raise side rails.
• Practice in a space that resembles the testing setup — a table at bed height, a chair nearby, a basin and supplies within reach. Spatial familiarity reduces anxiety on test day.
• Take a skills practice session with a classmate or clinical instructor in the days before your exam.

What happens if you fail

Federal law allows three attempts to pass the CNA exam within 24 months of completing training. After three failures, you must repeat an approved training program before you can test again. Some states set stricter limits.

If you fail one section, you typically only need to retake that section — not both. You can usually reschedule within a few weeks.

If you fail the skills section, request feedback from your testing vendor on which skills you failed and what steps you missed. Most vendors provide a score report that identifies the specific critical elements you did not complete. Use this to guide targeted practice before your next attempt.

State-by-state variation

While the NNAAP provides a national framework, every state customizes aspects of the exam:

• Some states add state-specific questions about state nursing home regulations
• Testing fees differ
• The number of skills tested in the clinical section varies (typically 3–5)
• Some states administer their own versions of the exam through a state-contracted vendor rather than Prometric or Pearson VUE
• Re-attempt limits and windows vary

Always verify your state’s specific requirements with your state’s nurse aide registry or health department. Your training program coordinator is usually the fastest source for current state-specific information.

After you pass

Once you pass both sections, your state will add your name to the nurse aide registry — the official database of state-certified CNAs that employers check before hiring. Registry listing is typically processed within 2–4 weeks of exam completion.

Your certification must be renewed periodically (usually every 24 months) by documenting paid employment as a CNA. The specific renewal requirements vary by state.

For CNAs looking to move up the career ladder, CNA-to-RN bridge programs provide the most direct path to RN licensure, while CNA-to-LPN bridge programs offer a faster intermediate step. For a full picture of the credential and what CNAs do day-to-day, see the how to become a CNA guide.