Certified Bariatric Nurse (CBN®) Exam 2026
Latest Comprehensive Study Guide with
Practice Questions Bariatric Nursing
Review • Detailed Rationales • Verified
Answers • Success Workbook
1. Which organization administers the Certified Bariatric Nurse (CBN®)
credential?
• A) American Nurses Credentialing Center (ANCC)
• B) American Society for Metabolic and Bariatric Surgery (ASMBS)
• C) National League for Nursing (NLN)
• D) American Association of Critical-Care Nurses (AACN)
Correct Answer: B) American Society for Metabolic and Bariatric Surgery
(ASMBS)
Rationale: The CBN® credential is administered by the American Society for
Metabolic and Bariatric Surgery (ASMBS). The exam validates specialized
knowledge and expertise in bariatric nursing care. ANCC administers other
certifications (e.g., med-surg, critical care), but not the CBN®.
2. What is the primary purpose of the CBN® certification?
• A) To replace state nursing licensure
• B) To validate specialized knowledge and competency in bariatric nursing
• C) To allow nurses to perform bariatric surgery independently
• D) To fulfill hospital orientation requirements
, Correct Answer: B) To validate specialized knowledge and competency in
bariatric nursing
Rationale: The CBN® certification demonstrates that a nurse has met rigorous
standards of knowledge and practice in the care of bariatric patients. It does not
replace licensure, grant surgical privileges, or serve as orientation.
3. Which BMI classification defines Class III (severe) obesity in adults?
• A) BMI 30.0–34.9 kg/m²
• B) BMI 35.0–39.9 kg/m²
• C) BMI ≥ 40 kg/m² or ≥ 35 kg/m² with obesity-related comorbidities
• D) BMI ≥ 50 kg/m² only
Correct Answer: C) BMI ≥ 40 kg/m² or ≥ 35 kg/m² with obesity-related
comorbidities
Rationale: Class III obesity (formerly "morbid obesity") is defined as BMI ≥ 40
kg/m² or BMI ≥ 35 kg/m² with at least one obesity-related comorbidity (e.g., type
2 diabetes, hypertension, OSA). Class I is 30–34.9 and Class II is 35–39.9.
4. Which of the following is NOT a criterion for bariatric surgery eligibility per
NIH guidelines?
• A) BMI ≥ 40 kg/m²
• B) BMI ≥ 35 kg/m² with obesity-related comorbidities
• C) Documented failure of nonsurgical weight loss methods
• D) Age ≥ 65 years with no comorbidities
Correct Answer: D) Age ≥ 65 years with no comorbidities
, Rationale: NIH criteria include BMI ≥ 40, or BMI ≥ 35 with comorbidities, plus
documented failed nonsurgical attempts. Age alone (≥65) without comorbidities is
not an eligibility criterion, and advanced age is not an absolute contraindication
but requires individualized assessment.
5. Which hormone is primarily responsible for stimulating appetite?
• A) Leptin
• B) Ghrelin
• C) Insulin
• D) Peptide YY (PYY)
Correct Answer: B) Ghrelin
Rationale: Ghrelin is secreted primarily by the stomach and stimulates hunger.
Leptin is produced by adipose tissue and suppresses appetite. PYY and insulin also
influence satiety and glucose metabolism, respectively.
6. What is the primary mechanism by which leptin resistance contributes to
obesity?
• A) Increased ghrelin secretion
• B) Reduced satiety signaling despite elevated leptin levels
• C) Enhanced thermogenesis
• D) Increased insulin sensitivity
Correct Answer: B) Reduced satiety signaling despite elevated leptin levels
Rationale: In obesity, leptin resistance occurs, meaning the brain does not
respond appropriately to leptin's satiety signals even though leptin levels are
elevated. This leads to continued food intake and weight gain.
, 7. Which of the following is a common obesity-related comorbidity that
improves after bariatric surgery?
• A) Type 1 diabetes mellitus
• B) Obstructive sleep apnea (OSA)
• C) Cystic fibrosis
• D) Sickle cell anemia
Correct Answer: B) Obstructive sleep apnea (OSA)
Rationale: OSA is strongly associated with obesity and often resolves or
significantly improves after bariatric surgery due to weight loss and reduced
airway compression. Type 1 diabetes, cystic fibrosis, and sickle cell anemia are not
obesity-related comorbidities.
8. Which nursing theorist's model is most applicable to bariatric nursing care?
• A) Florence Nightingale
• B) Dorothea Orem (Self-Care Deficit Theory)
• C) Hildegard Peplau (Interpersonal Relations Theory)
• D) Jean Watson (Theory of Human Caring)
Correct Answer: D) Jean Watson (Theory of Human Caring)
Rationale: Watson's Theory of Human Caring emphasizes holistic,
compassionate care and is highly relevant to bariatric nursing, where patients
often face stigma, emotional challenges, and complex psychosocial needs. While
other theories apply, Watson's caring model is particularly suited to this
population.
Latest Comprehensive Study Guide with
Practice Questions Bariatric Nursing
Review • Detailed Rationales • Verified
Answers • Success Workbook
1. Which organization administers the Certified Bariatric Nurse (CBN®)
credential?
• A) American Nurses Credentialing Center (ANCC)
• B) American Society for Metabolic and Bariatric Surgery (ASMBS)
• C) National League for Nursing (NLN)
• D) American Association of Critical-Care Nurses (AACN)
Correct Answer: B) American Society for Metabolic and Bariatric Surgery
(ASMBS)
Rationale: The CBN® credential is administered by the American Society for
Metabolic and Bariatric Surgery (ASMBS). The exam validates specialized
knowledge and expertise in bariatric nursing care. ANCC administers other
certifications (e.g., med-surg, critical care), but not the CBN®.
2. What is the primary purpose of the CBN® certification?
• A) To replace state nursing licensure
• B) To validate specialized knowledge and competency in bariatric nursing
• C) To allow nurses to perform bariatric surgery independently
• D) To fulfill hospital orientation requirements
, Correct Answer: B) To validate specialized knowledge and competency in
bariatric nursing
Rationale: The CBN® certification demonstrates that a nurse has met rigorous
standards of knowledge and practice in the care of bariatric patients. It does not
replace licensure, grant surgical privileges, or serve as orientation.
3. Which BMI classification defines Class III (severe) obesity in adults?
• A) BMI 30.0–34.9 kg/m²
• B) BMI 35.0–39.9 kg/m²
• C) BMI ≥ 40 kg/m² or ≥ 35 kg/m² with obesity-related comorbidities
• D) BMI ≥ 50 kg/m² only
Correct Answer: C) BMI ≥ 40 kg/m² or ≥ 35 kg/m² with obesity-related
comorbidities
Rationale: Class III obesity (formerly "morbid obesity") is defined as BMI ≥ 40
kg/m² or BMI ≥ 35 kg/m² with at least one obesity-related comorbidity (e.g., type
2 diabetes, hypertension, OSA). Class I is 30–34.9 and Class II is 35–39.9.
4. Which of the following is NOT a criterion for bariatric surgery eligibility per
NIH guidelines?
• A) BMI ≥ 40 kg/m²
• B) BMI ≥ 35 kg/m² with obesity-related comorbidities
• C) Documented failure of nonsurgical weight loss methods
• D) Age ≥ 65 years with no comorbidities
Correct Answer: D) Age ≥ 65 years with no comorbidities
, Rationale: NIH criteria include BMI ≥ 40, or BMI ≥ 35 with comorbidities, plus
documented failed nonsurgical attempts. Age alone (≥65) without comorbidities is
not an eligibility criterion, and advanced age is not an absolute contraindication
but requires individualized assessment.
5. Which hormone is primarily responsible for stimulating appetite?
• A) Leptin
• B) Ghrelin
• C) Insulin
• D) Peptide YY (PYY)
Correct Answer: B) Ghrelin
Rationale: Ghrelin is secreted primarily by the stomach and stimulates hunger.
Leptin is produced by adipose tissue and suppresses appetite. PYY and insulin also
influence satiety and glucose metabolism, respectively.
6. What is the primary mechanism by which leptin resistance contributes to
obesity?
• A) Increased ghrelin secretion
• B) Reduced satiety signaling despite elevated leptin levels
• C) Enhanced thermogenesis
• D) Increased insulin sensitivity
Correct Answer: B) Reduced satiety signaling despite elevated leptin levels
Rationale: In obesity, leptin resistance occurs, meaning the brain does not
respond appropriately to leptin's satiety signals even though leptin levels are
elevated. This leads to continued food intake and weight gain.
, 7. Which of the following is a common obesity-related comorbidity that
improves after bariatric surgery?
• A) Type 1 diabetes mellitus
• B) Obstructive sleep apnea (OSA)
• C) Cystic fibrosis
• D) Sickle cell anemia
Correct Answer: B) Obstructive sleep apnea (OSA)
Rationale: OSA is strongly associated with obesity and often resolves or
significantly improves after bariatric surgery due to weight loss and reduced
airway compression. Type 1 diabetes, cystic fibrosis, and sickle cell anemia are not
obesity-related comorbidities.
8. Which nursing theorist's model is most applicable to bariatric nursing care?
• A) Florence Nightingale
• B) Dorothea Orem (Self-Care Deficit Theory)
• C) Hildegard Peplau (Interpersonal Relations Theory)
• D) Jean Watson (Theory of Human Caring)
Correct Answer: D) Jean Watson (Theory of Human Caring)
Rationale: Watson's Theory of Human Caring emphasizes holistic,
compassionate care and is highly relevant to bariatric nursing, where patients
often face stigma, emotional challenges, and complex psychosocial needs. While
other theories apply, Watson's caring model is particularly suited to this
population.
