WGU D774 Applied Healthcare Informatics
Comprehensive Question Bank & Study Guide
[2026 Edition]
DOMAIN 1: FOUNDATIONS OF HEALTH INFORMATICS
**1. A nurse enters a patient's resting heart rate of 78 bpm into the Electronic Health
Record (EHR). According to the DIKW (Data - Information - Knowledge - Wisdom) pyramid,
what does the number "78" represent?**
A) Information
B) Data
C) Knowledge
D) Wisdom
**Answer: B) Data**
**Rationale:** Data consists of discrete, unorganized facts or symbols (like the number
78). When the data is given context (e.g., "Heart rate is 78 bpm, which is within the
normal range for an adult"), it becomes *Information*. When information is synthesized
to make a clinical decision, it becomes *Knowledge*. Wisdom is the application of
knowledge to achieve a positive outcome.
**2. Which model is most useful for understanding how a change in one part of a
healthcare system (e.g., implementing a new EHR) will affect other parts of the system
(e.g., nursing workflow and pharmacy turnaround times)?**
A) DIKW Pyramid
,B) Systems Theory
C) Evidence - Based Practice Model
D) Maslow's Hierarchy
**Answer: B) Systems Theory**
**Rationale:** Systems theory views an organization as a complex, interconnected set
of parts. A change in one subsystem inevitably impacts the others. It is the
foundational framework for analyzing workflow and implementing health IT.
**3. A health informaticist is trying to understand why clinicians are bypassing a new
Clinical Decision Support (CDS) alert. They are observing the clinicians' thought
processes, screen interactions, and physical environment. Which cognitive science
appro ach are they using? **
A) User acceptance testing
B) Distributed cognition
C) Heuristic evaluation
D) Data mining
**Answer: B) Distributed cognition**
**Rationale:** Distributed cognition looks beyond the individual human mind and
studies how cognitive processes are distributed across people, tools (like the EHR),
and the environment. It is highly applicable in health informatics to understand how
clinic ians interact with health IT systems.
**4. Which of the following best describes "Information Governance" in a healthcare
se tting?**
A) The hardware and software infrastructure required to store patient data.
B) The strategic framework for managing, securing, and ensuring the quality and
compliance of an organization's information assets.
C) The process of translating medical terms into billing codes.
D) The clinical guidelines embedded in the EHR to guide patient care.
, **Answer: B) The strategic framework...**
**Rationale:** Information governance goes beyond IT security; it is the overarching
strategy that ensures data is reliable, secure, compliant (e.g., HIPAA), and available to
the right people at the right time to drive decision - making.
---
# DOMAIN 2: CLINICAL DATA STANDARDS & TERMINOLOGIES (High - Yield)
**5. A hospital wants to standardize the way clinical observations (like vital signs, lab
results, and clinical assessments) are recorded so that data can be shar ed seamlessly
across different departments and external systems. Which terminology standard is the
BEST choice?**
A) ICD - 10- CM
B) CPT
C) LOINC (Logical Observation Identifiers Names and Codes)
D) SNOMED CT
**Answer: C) LOINC**
**Rationale:** LOINC is specifically designed for laboratory tests and clinical
observations. While SNOMED CT is used for clinical diagnoses/findings, LOINC is the
standard for identifying the *question* being asked or the *observation* being made
(e.g., "Glucose in Blood").
**6. Which terminology is a comprehensive, multilingual clinical healthcare
terminology used in EHRs to consistently capture, index, store, and retrieve clinical
findings (e.g., "fracture of the femur" or "asthma")?**
A) SNOMED CT (Sy stematized Nomenclature of Medicine - Clinical Terms)
B) ICD - 10- PCS
C) RxNorm
Comprehensive Question Bank & Study Guide
[2026 Edition]
DOMAIN 1: FOUNDATIONS OF HEALTH INFORMATICS
**1. A nurse enters a patient's resting heart rate of 78 bpm into the Electronic Health
Record (EHR). According to the DIKW (Data - Information - Knowledge - Wisdom) pyramid,
what does the number "78" represent?**
A) Information
B) Data
C) Knowledge
D) Wisdom
**Answer: B) Data**
**Rationale:** Data consists of discrete, unorganized facts or symbols (like the number
78). When the data is given context (e.g., "Heart rate is 78 bpm, which is within the
normal range for an adult"), it becomes *Information*. When information is synthesized
to make a clinical decision, it becomes *Knowledge*. Wisdom is the application of
knowledge to achieve a positive outcome.
**2. Which model is most useful for understanding how a change in one part of a
healthcare system (e.g., implementing a new EHR) will affect other parts of the system
(e.g., nursing workflow and pharmacy turnaround times)?**
A) DIKW Pyramid
,B) Systems Theory
C) Evidence - Based Practice Model
D) Maslow's Hierarchy
**Answer: B) Systems Theory**
**Rationale:** Systems theory views an organization as a complex, interconnected set
of parts. A change in one subsystem inevitably impacts the others. It is the
foundational framework for analyzing workflow and implementing health IT.
**3. A health informaticist is trying to understand why clinicians are bypassing a new
Clinical Decision Support (CDS) alert. They are observing the clinicians' thought
processes, screen interactions, and physical environment. Which cognitive science
appro ach are they using? **
A) User acceptance testing
B) Distributed cognition
C) Heuristic evaluation
D) Data mining
**Answer: B) Distributed cognition**
**Rationale:** Distributed cognition looks beyond the individual human mind and
studies how cognitive processes are distributed across people, tools (like the EHR),
and the environment. It is highly applicable in health informatics to understand how
clinic ians interact with health IT systems.
**4. Which of the following best describes "Information Governance" in a healthcare
se tting?**
A) The hardware and software infrastructure required to store patient data.
B) The strategic framework for managing, securing, and ensuring the quality and
compliance of an organization's information assets.
C) The process of translating medical terms into billing codes.
D) The clinical guidelines embedded in the EHR to guide patient care.
, **Answer: B) The strategic framework...**
**Rationale:** Information governance goes beyond IT security; it is the overarching
strategy that ensures data is reliable, secure, compliant (e.g., HIPAA), and available to
the right people at the right time to drive decision - making.
---
# DOMAIN 2: CLINICAL DATA STANDARDS & TERMINOLOGIES (High - Yield)
**5. A hospital wants to standardize the way clinical observations (like vital signs, lab
results, and clinical assessments) are recorded so that data can be shar ed seamlessly
across different departments and external systems. Which terminology standard is the
BEST choice?**
A) ICD - 10- CM
B) CPT
C) LOINC (Logical Observation Identifiers Names and Codes)
D) SNOMED CT
**Answer: C) LOINC**
**Rationale:** LOINC is specifically designed for laboratory tests and clinical
observations. While SNOMED CT is used for clinical diagnoses/findings, LOINC is the
standard for identifying the *question* being asked or the *observation* being made
(e.g., "Glucose in Blood").
**6. Which terminology is a comprehensive, multilingual clinical healthcare
terminology used in EHRs to consistently capture, index, store, and retrieve clinical
findings (e.g., "fracture of the femur" or "asthma")?**
A) SNOMED CT (Sy stematized Nomenclature of Medicine - Clinical Terms)
B) ICD - 10- PCS
C) RxNorm
