(2026) – Diff Dx Actual Questions and
Answers (PDF)
What is the first step in the diagnostic reasoning process?
Taking a history of the patient.
What does HPI stand for in the context of patient history?
History of Present Illness.
What mnemonic can help remember essential data elements in history-taking?
OLD CART.
What type of information does ROS provide?
Subjective information that aids in narrowing potential differentials.
,What does objective information include?
What is seen, heard, or felt during the physical exam, including lab data and test
results.
How does diagnostic reasoning relate to critical thinking?
It supports clinical judgment and involves systematic problem-solving.
What is a differential diagnosis?
A list of possible diagnoses, usually in priority order.
What should always be included in a differential diagnosis list?
Life-, organ-, or function-threatening conditions.
What is evidence-based practice (EBP)?
An approach that promotes the use of the best available evidence in clinical
decision-making.
What is the highest level of evidence in EBP?
,Systematic review of randomized clinical trial studies.
What does sensitivity measure in a diagnostic test?
The ability of a test to correctly identify people who have the disease.
What does specificity measure in a diagnostic test?
The ability of a test to correctly identify people who do not have the disease.
What is Medicare Part A?
Hospital inpatient services.
What is Medicare Part B?
Medical outpatient physician services.
What does Medicare Part C include?
Medicare Advantage, which combines Parts A and B with extra benefits.
What is the role of third-party payers in healthcare?
, They determine reimbursement policies for healthcare services.
What is the core idea behind reimbursement, billing, and coding?
Accurate documentation plus correct coding equals proper reimbursement.
What does CPT stand for?
Current Procedural Terminology.
What is the most important component in E&M coding?
Medical Decision Making (MDM).
What are the requirements for 'incident to' billing?
Physician on-site, established patient, and established problem.
What is the payment percentage for NP services under physician supervision?
100%.
What is the payment percentage for NP services when billed alone?