Clinical Nurse Specialist Practice Test

What the Clinical Nurse Specialist is and how it works

According to AACN Certification Corporation (American Association of Critical-Care Nurses), which owns the ACCNS-AG exam; ANCC (Ameri, “The ACCNS-AG exam is three-and-a-half (3 ½) hours and consists of 175 multiple-choice items. Of the 175 items, 150 are scored.”^[1]

Clinical Nurse Specialist certification validates advanced practice knowledge across patient care, nursing practice, and healthcare systems. Two primary organizations credential adult-gerontology clinical nurse specialists: AACN Certification Corporation offers the ACCNS-AG, and ANCC offers the AGCNS-BC.

For the ACCNS-AG, candidates need an unencumbered U.S. RN or APRN license plus completion of an adult-gerontology CNS graduate program with 500 supervised clinical hours. Testing takes place at a PSI test center or via live remote proctoring. The exam consists of 175 multiple-choice items, of which 150 are scored. AACN charges $275 for members and $385 for nonmembers. Candidates receive an eligibility window of 180 days (normally 90 days). AACN uses a criterion-referenced modified Angoff cut score. Results appear on-screen immediately, followed by a detailed score report within 24 hours. Retesting costs $215 for members or $320 for nonmembers, with up to 4 attempts permitted in a rolling 12 months. Certification remains valid for 5 years, with renewal requiring 1,000 practice hours and 150 CE points, or an exam-based option.

For the ANCC AGCNS-BC, candidates must hold an active RN license and graduate from an accredited program with 500 clinical hours. Testing is computer-based at Prometric during a 120-day testing window following year-round application. It contains 175 questions (150 scored). Initial testing fees are $295 for ANA members and $395 for nonmembers, renewal is valid for 5 years, and renewal costs $275 for ANA members or $375 for nonmembers. State APRN licensing rules vary, so candidates should check their state board of nursing for specific jurisdiction requirements.

Clinical Nurse Specialist Exam at a Glance

Clinical Nurse Specialist content outline and where to practise each area

The content areas below are copied from the official Clinical Nurse Specialist content outline published by AACN Certification Corporation (American Association of Critical-Care Nurses), which owns the ACCNS-AG exam; ANCC (Ameri, with the share of the exam each area carries. The right-hand column shows which of our practice sets covers it.

Worked examples: how to reason through Clinical Nurse Specialist questions

These are practice questions written for this site, not questions from the real exam. Each explanation shows why the right answer is right and why the others are wrong.

Example 1

Question: A CNS is reviewing the hospital's compliance with the Emergency Medical Treatment and Labor Act (EMTALA). Which patient scenario would represent an EMTALA violation?

1. A patient is transferred to a higher level of care facility after stabilization for specialty services unavailable at the transferring hospital
2. A patient presenting to the ED in active labor is transferred to another hospital before delivery because the patient lacks health insurance
3. A patient with a psychiatric emergency is transferred after initial assessment to a psychiatric facility with appropriate consent and accepting physician
4. A patient requests transfer to a closer facility for family visitation convenience after initial stabilization

Answer: B. A patient presenting to the ED in active labor is transferred to another hospital before delivery because the patient lacks health insurance

Explanation:

Option B is correct because the Emergency Medical Treatment and Labor Act strictly prohibits transferring or discharging an individual in active labor before delivery due to lack of health insurance or inability to pay. Under federal statute, active labor constitutes an emergency medical condition that requires stabilization and delivery unless the patient requests a transfer in writing or a physician certifies medical necessity.

Option A is incorrect because transferring a patient after stabilization to access specialty care not available at the originating facility adheres to statutory transfer guidelines.

Option C is incorrect because psychiatric transfers are compliant when arranged after initial assessment, with patient consent, and to an accepting facility.

Option D is incorrect because a stable patient may request transfer for personal or family convenience.

Remember the rule: unstable conditions, including active labor, must be stabilized before any transfer unless specific statutory exceptions are met.

Example 2

Question: A CNS is leading a journal club and asks staff to evaluate the internal validity of a cohort study examining the association between nurse staffing ratios and patient falls. Which threat to internal validity is most relevant to this study design?

1. Selection bias — patients with higher fall risk may be preferentially cared for on lower-staffed units
2. Publication bias — negative studies are less likely to be published
3. Hawthorne effect — staff know they are being observed and change behavior
4. Reporting bias — falls may be under-documented on some units

Answer: A. Selection bias — patients with higher fall risk may be preferentially cared for on lower-staffed units

Explanation:

Option A is correct because selection bias occurs when patient groups differ systematically at baseline. In an observational cohort study of staffing and falls, higher-acuity patients who have greater baseline fall risk might be placed on units with different staffing levels, introducing confounding by indication that distorts the observed association.

Option B is incorrect because publication bias affects systematic reviews and meta-analyses when journals favor positive findings over negative findings, rather than the internal validity of an individual study design.

Option C is incorrect because the Hawthorne effect refers to participants modifying actions due to awareness of observation, which is not the primary vulnerability of retrospective or non-randomized cohort assignments.

Option D is incorrect because reporting bias involves selective disclosure of outcomes rather than the structural confounding inherent in clinical group assignments.

Remember the rule: non-randomized observational cohorts must always be assessed for selection bias and baseline confounding.

Example 3

Question: A patient with chronic kidney disease stage 4 develops normocytic anemia with low reticulocyte count. Which pathophysiological mechanism is primarily responsible?

1. Iron deficiency anemia from poor nutritional intake in CKD patients
2. Reduced erythropoietin production by diseased kidneys causing inadequate red blood cell production
3. Hemolytic anemia from uremic toxin-induced erythrocyte destruction
4. B12 deficiency from impaired absorption due to uremic enteropathy

Answer: B. Reduced erythropoietin production by diseased kidneys causing inadequate red blood cell production

Explanation:

Option B is correct because advanced renal impairment compromises peritubular capillary cells, resulting in deficient erythropoietin synthesis. Because erythropoietin stimulates erythroid progenitor proliferation in the bone marrow, deficiency causes normocytic, normochromic anemia with a low reticulocyte count.

Option A is incorrect because iron deficiency typically produces a microcytic, hypochromic anemia with distinct iron indices rather than pure marrow hypoproliferation from hormonal loss.

Option C is incorrect because hemolytic destruction triggers bone marrow response resulting in a high reticulocyte count, not a low count.

Option D is incorrect because cobalamin deficiency results in macrocytic megaloblastic changes rather than normocytic red blood cell indices.

Remember the rule: normocytic anemia accompanied by low reticulocytes in chronic kidney disease points directly to inadequate erythropoietin production by failing renal tissue.

How to use these practice tests

Prepare by aligning review sessions directly with official testing content areas: CLINICAL JUDGMENT (67%) and PROFESSIONAL CARING & ETHICAL PRACTICE (33%). Begin by assessing baseline recall across system pathophysiology and pharmacology using Clinical Nurse Specialist Advanced Pharmacology and Adult Health Clinical Nurse Specialist.

Next, focus on organizational leadership, legal statutes, and research appraisal using Professional Standards & Competencies, Risk Assessment & Management, and Quality Control & Assurance. For each practice item, analyze the rationales for correct and incorrect answers to address reasoning gaps rather than memorizing isolated items. Conclude preparation by reviewing the official candidate handbook from the testing body and taking full-length timed sets matching the 175-item layout to practice pacing under the 3.5-hour time limit.

Sources & last verified

1. AACN Certification Corporation (American Association of Critical-Care Nurses), which owns the ACCNS-AG exam; ANCC (Ameri — number of questions, passing score, retake fee, validity (official source). “The ACCNS-AG exam is three-and-a-half (3 ½) hours and consists of 175 multiple-choice items. Of the 175 items, 150 are scored.” Verified Oct 20, 2026.
2. AACN Certification Corporation (American Association of Critical-Care Nurses), which owns the ACCNS-AG exam; ANCC (Ameri — exam fee (official source). “AACN Members $275 Nonmembers $385” Verified Oct 22, 2026 · source checked Oct 22, 2026.
3. nursingworld.org — number of questions, exam fee, validity, renewal (official source). “The exam allows 3.5 hours to answer 175 questions (150 scored plus 25 pretest questions that are not scored).” Verified Oct 26, 2026 · source checked Oct 26, 2026.
4. AACN Certification Corporation (American Association of Critical-Care Nurses), which owns the ACCNS-AG exam; ANCC (Ameri — retake policy (official source). “Candidates may apply for and take the same certification exam up to 4 times in a rolling 12-month period.” Verified Oct 20, 2026 · source checked Oct 17, 2026.
5. AACN Certification Corporation (American Association of Critical-Care Nurses), which owns the ACCNS-AG exam; ANCC (Ameri — other (official source). “clinical judgment 67%” Verified Oct 22, 2026 · source checked Oct 22, 2026.

How we verify: editorial & fact-checking policy. Report an error: contact us.