10 free, exam-style Certified Health Data Analyst (CHDA) practice questions with answers and explanations. No signup required. Work through them below, then take the full free CHDA practice test to study every exam domain.
A health data analyst is reviewing inpatient procedure codes for a hospital's quality reporting program. Which of the following statements about ICD-10-PCS is correct?
Correct answer: C - Each code is exactly 7 alphanumeric characters and excludes the letters O and I
An epidemiologist notes that the incidence of a chronic disease in a population has remained stable for a decade, but its prevalence has been steadily increasing during the same period. Which of the following best explains this observation?
Correct answer: B - Patients with the disease are surviving longer due to improved treatment
A data analyst auditing an enterprise data warehouse finds that the 'Patient Sex' field contains the following values across various source systems: 'M', 'F', 'Male', 'Female', '1', '2', and 'U'. Which characteristic of AHIMA's Data Quality Management Model is MOST directly violated?
Correct answer: D - Consistency
A hospital's infection control registry pulls discharge data 90 days after the end of each reporting period to allow time for late-arriving culture results. Although the data are accurate when reported, the infection prevention committee receives the report too late to intervene on emerging trends. Which AHIMA data quality characteristic is MOST directly compromised in this scenario?
Correct answer: B - Timeliness - the data are not appropriate for the intended use
A new screening test for a condition was evaluated against a gold standard in 1,000 patients. The results are shown below: Disease+ Disease− Test Positive 180 60 Test Negative 20 740 What is the sensitivity of this screening test?
Correct answer: B - 90.0%
A health data analyst wants to determine whether the average length of stay (ALOS) differs significantly across four hospital units. Preliminary analysis confirms the LOS data are approximately normally distributed within each unit and variances are roughly equal. Which statistical test is MOST appropriate?
Correct answer: C - One-way analysis of variance (ANOVA)
A hospital's risk-adjusted 30-day mortality observed-to-expected (O/E) ratio is reported as 0.85 with a 95% confidence interval of (0.74, 0.96). How should the quality director interpret this finding?
Correct answer: B - Mortality is better than expected, and the difference is statistically significant
A data analyst reports that the 95% confidence interval for a hospital's mean length of stay is 4.2 to 5.6 days. Which of the following is the CORRECT interpretation of this confidence interval?
Correct answer: C - If the analysis were repeated many times with different samples, approximately 95% of the calculated intervals would contain the true mean length of stay
A health data analyst has been asked to visualize the distribution of patient ages in a 10,000-record dataset to identify the shape of the distribution and any potential outliers. Which chart type is MOST appropriate?
Correct answer: D - Histogram with consistent bin widths
A hospital privacy officer is training new clinical staff on the HIPAA Privacy Rule's Minimum Necessary Standard. Which of the following disclosures is EXEMPT from the Minimum Necessary requirement?
Correct answer: B - Disclosure of PHI to a healthcare provider for treatment of the patient
Practice hundreds more CHDA questions with instant scoring, weak-area drills, and full exam simulations.