CSTR | INDEPENDENT PRACTICE RESOURCE
CERTIFIED SPECIALIST IN TRAUMA REGISTRIES
(CSTR)
CERTIFICATION PRACTICE EXAM 2026–2027
165 ORIGINAL MULTIPLE-CHOICE QUESTIONS • CORRECT ANSWERS • RATIONALES
American Trauma Society CSTR outline domains: Trauma Systems • Data Management • Conditions of
Injury • Coding and Scoring Concepts
Registry operations • data abstraction and validation • PIPS • anatomy and physiology • AIS/ISS concepts
• ICD-10-CM/PCS • confidentiality and compliance
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
ACADEMIC-INTEGRITY & EXAM-SECURITY NOTICE
This document contains independently written practice questions. It is not the American Trauma Society CSTR examination,
an official ATS practice product, a recalled test bank, or an item set that has been graded or “100% verified.” No affiliation,
sponsorship, or endorsement is claimed. Use it only for lawful study consistent with ATS exam-security rules and your
employer’s policies.
AIS INTELLECTUAL-PROPERTY NOTICE
The Abbreviated Injury Scale (AIS) is copyrighted by the Association for the Advancement of Automotive Medicine (AAAM)
and requires licensed materials for actual coding. This resource tests public conceptual knowledge and original calculations; it
does not reproduce proprietary AIS code tables. Always code from the licensed manual/version used by your center.
EVIDENCE & VERSION SCOPE
The official January 2026 ATS candidate handbook states that the web-based CSTR examination contains 165 questions (150
scored and 15 pilot), allows three hours, and uses four primary domains. This practice document mirrors the total length and
domains only; all 165 practice items are scored for self-study. Definitions and standards change—verify the admission-year NTDS
dictionary, current ICD-10 files, licensed AIS manual, and controlling state/local requirements.
Trauma Systems • Data Management • Conditions of Injury • Coding & Scoring | Page 1
, CSTR | INDEPENDENT PRACTICE RESOURCE
How to Use This Practice Exam
Timed simulation: Three hours for 165 items is about 65 seconds per question. Hide answer blocks and complete
one pass before review.
Reasoning pass: For each item, name the controlling definition/source, the data-quality or safety consequence, and
why each distractor fails.
Remediation: Review misses by domain using current official sources. Memorizing this wording is not a substitute
for source-based abstraction practice.
Score caution: A practice percentage cannot predict the official score because official pilot items are unidentified
and exam forms are controlled and equated by the certifying program.
Practice-Set Blueprint
ain Questions Count
ma Systems 1–35 35
Management 36–80 45
itions of Injury 81–120 40
ng & Scoring Concepts 121–165 45
Blueprint note: The counts above are this resource’s study distribution; they are not asserted to be the official scored-domain
weighting.
Trauma Systems • Data Management • Conditions of Injury • Coding & Scoring | Page 2
, CSTR | INDEPENDENT PRACTICE RESOURCE
I. Trauma Systems
1. Which statement best distinguishes trauma center designation from verification?
A. A hospital may designate itself after completing an internal audit.
B. Verification automatically replaces all state designation requirements.
C. Designation and verification are identical terms in every jurisdiction.
D. Designation is granted by a governmental or other legally authorized entity, whereas verification is an external
assessment against published standards.
CORRECT ANSWER: D. Designation is granted by a governmental or other legally authorized entity,
whereas verification is an external assessment against published standards.
RATIONALE Designation is a jurisdictional status; verification is an external review of capability and performance. The terms
are not interchangeable, and self-designation does not satisfy legal or regulatory authority.
2. What is the primary system role of a Level I trauma center?
A. Treat minor injuries only and avoid regional coordination.
B. Function solely as a data repository without clinical services.
C. Provide only initial stabilization before mandatory transfer of every patient.
D. Provide comprehensive care for major injury while supporting system leadership, education, research, and
performance improvement.
CORRECT ANSWER: D. Provide comprehensive care for major injury while supporting system leadership,
education, research, and performance improvement.
RATIONALE Level I centers provide the broadest trauma resources and contribute leadership, education, research, and
quality improvement. Stabilize-and-transfer is more characteristic of resource-limited levels; the other options omit the
clinical mission.
3. A Level IV center receives a critically injured patient beyond its definitive capability. What is its
central system responsibility?
A. Rapidly assess and stabilize the patient, initiate necessary lifesaving care, and arrange appropriate transfer under
established agreements.
B. Transfer the patient without communicating clinical information.
C. Delay treatment until the receiving center accepts the patient in writing.
D. Retain every patient regardless of available resources.
CORRECT ANSWER: A. Rapidly assess and stabilize the patient, initiate necessary lifesaving care, and
arrange appropriate transfer under established agreements.
RATIONALE Lower-level centers are essential access points for stabilization and timely transfer. Delaying lifesaving care,
retaining patients beyond capability, or transferring without a handoff jeopardizes safety and system continuity.
4. What is the best method for monitoring compliance with a highest-level trauma activation response
requirement?
A. Review the written policy without examining cases.
B. Count only the number of pages sent.
C. Ask team members whether they usually arrive on time.
D. Compare the required response interval with reliable, time-stamped actual arrival data and trend exceptions.
CORRECT ANSWER: D. Compare the required response interval with reliable, time-stamped actual
arrival data and trend exceptions.
RATIONALE Compliance requires a defined denominator, valid timestamps, and case-level comparison with the standard.
Page counts, recollection, and policy review alone do not establish actual performance.
Trauma Systems • Data Management • Conditions of Injury • Coding & Scoring | Page 3
, CSTR | INDEPENDENT PRACTICE RESOURCE
5. What is the principal advantage of a tiered trauma activation system?
A. It permits activation decisions to depend only on bed availability.
B. It eliminates the need for activation criteria.
C. It matches the urgency and composition of the response to predefined patient risk while preserving the ability to
escalate.
D. It guarantees that undertriage cannot occur.
CORRECT ANSWER: C. It matches the urgency and composition of the response to predefined patient risk
while preserving the ability to escalate.
RATIONALE Tiering supports appropriate resource use when criteria are explicit and escalation is available. It does not
remove criteria, eliminate undertriage, or allow operational convenience to replace patient need.
6. In trauma triage, what does undertriage mean?
A. Every trauma patient is transferred to a Level I center.
B. A seriously injured patient receives a lower level of trauma response or destination than the patient’s needs warrant.
C. The registry contains more cases than expected.
D. A minimally injured patient receives a higher-level response.
CORRECT ANSWER: B. A seriously injured patient receives a lower level of trauma response or
destination than the patient’s needs warrant.
RATIONALE Undertriage risks delayed definitive care for seriously injured patients. A high response for a low-risk patient is
overtriage; registry volume and universal transfer are different issues.
7. What is a core responsibility of the trauma medical director?
A. Delegate all clinical accountability to the software vendor.
B. Serve only as a ceremonial committee chair.
C. Personally abstract every registry field.
D. Provide physician leadership and accountability for clinical trauma care and the performance improvement and
patient safety process.
CORRECT ANSWER: D. Provide physician leadership and accountability for clinical trauma care and the
performance improvement and patient safety process.
RATIONALE The trauma medical director leads clinical standards, physician engagement, and PIPS. Registry abstraction can
be delegated to trained staff, but clinical accountability cannot be reduced to a ceremonial or vendor function.
8. Which activity is most characteristic of the trauma program manager role?
A. Control the state’s designation authority.
B. Assign AIS codes without documentation.
C. Replace the trauma medical director for all physician peer review.
D. Coordinate day-to-day trauma program operations, standards readiness, multidisciplinary work, education, and
follow-through on improvement activities.
CORRECT ANSWER: D. Coordinate day-to-day trauma program operations, standards readiness,
multidisciplinary work, education, and follow-through on improvement activities.
RATIONALE The program manager integrates operational, regulatory, educational, and improvement functions. The role
does not authorize unsupported coding, replace physician leadership, or control an external designation agency.
Trauma Systems • Data Management • Conditions of Injury • Coding & Scoring | Page 4
CERTIFIED SPECIALIST IN TRAUMA REGISTRIES
(CSTR)
CERTIFICATION PRACTICE EXAM 2026–2027
165 ORIGINAL MULTIPLE-CHOICE QUESTIONS • CORRECT ANSWERS • RATIONALES
American Trauma Society CSTR outline domains: Trauma Systems • Data Management • Conditions of
Injury • Coding and Scoring Concepts
Registry operations • data abstraction and validation • PIPS • anatomy and physiology • AIS/ISS concepts
• ICD-10-CM/PCS • confidentiality and compliance
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
ACADEMIC-INTEGRITY & EXAM-SECURITY NOTICE
This document contains independently written practice questions. It is not the American Trauma Society CSTR examination,
an official ATS practice product, a recalled test bank, or an item set that has been graded or “100% verified.” No affiliation,
sponsorship, or endorsement is claimed. Use it only for lawful study consistent with ATS exam-security rules and your
employer’s policies.
AIS INTELLECTUAL-PROPERTY NOTICE
The Abbreviated Injury Scale (AIS) is copyrighted by the Association for the Advancement of Automotive Medicine (AAAM)
and requires licensed materials for actual coding. This resource tests public conceptual knowledge and original calculations; it
does not reproduce proprietary AIS code tables. Always code from the licensed manual/version used by your center.
EVIDENCE & VERSION SCOPE
The official January 2026 ATS candidate handbook states that the web-based CSTR examination contains 165 questions (150
scored and 15 pilot), allows three hours, and uses four primary domains. This practice document mirrors the total length and
domains only; all 165 practice items are scored for self-study. Definitions and standards change—verify the admission-year NTDS
dictionary, current ICD-10 files, licensed AIS manual, and controlling state/local requirements.
Trauma Systems • Data Management • Conditions of Injury • Coding & Scoring | Page 1
, CSTR | INDEPENDENT PRACTICE RESOURCE
How to Use This Practice Exam
Timed simulation: Three hours for 165 items is about 65 seconds per question. Hide answer blocks and complete
one pass before review.
Reasoning pass: For each item, name the controlling definition/source, the data-quality or safety consequence, and
why each distractor fails.
Remediation: Review misses by domain using current official sources. Memorizing this wording is not a substitute
for source-based abstraction practice.
Score caution: A practice percentage cannot predict the official score because official pilot items are unidentified
and exam forms are controlled and equated by the certifying program.
Practice-Set Blueprint
ain Questions Count
ma Systems 1–35 35
Management 36–80 45
itions of Injury 81–120 40
ng & Scoring Concepts 121–165 45
Blueprint note: The counts above are this resource’s study distribution; they are not asserted to be the official scored-domain
weighting.
Trauma Systems • Data Management • Conditions of Injury • Coding & Scoring | Page 2
, CSTR | INDEPENDENT PRACTICE RESOURCE
I. Trauma Systems
1. Which statement best distinguishes trauma center designation from verification?
A. A hospital may designate itself after completing an internal audit.
B. Verification automatically replaces all state designation requirements.
C. Designation and verification are identical terms in every jurisdiction.
D. Designation is granted by a governmental or other legally authorized entity, whereas verification is an external
assessment against published standards.
CORRECT ANSWER: D. Designation is granted by a governmental or other legally authorized entity,
whereas verification is an external assessment against published standards.
RATIONALE Designation is a jurisdictional status; verification is an external review of capability and performance. The terms
are not interchangeable, and self-designation does not satisfy legal or regulatory authority.
2. What is the primary system role of a Level I trauma center?
A. Treat minor injuries only and avoid regional coordination.
B. Function solely as a data repository without clinical services.
C. Provide only initial stabilization before mandatory transfer of every patient.
D. Provide comprehensive care for major injury while supporting system leadership, education, research, and
performance improvement.
CORRECT ANSWER: D. Provide comprehensive care for major injury while supporting system leadership,
education, research, and performance improvement.
RATIONALE Level I centers provide the broadest trauma resources and contribute leadership, education, research, and
quality improvement. Stabilize-and-transfer is more characteristic of resource-limited levels; the other options omit the
clinical mission.
3. A Level IV center receives a critically injured patient beyond its definitive capability. What is its
central system responsibility?
A. Rapidly assess and stabilize the patient, initiate necessary lifesaving care, and arrange appropriate transfer under
established agreements.
B. Transfer the patient without communicating clinical information.
C. Delay treatment until the receiving center accepts the patient in writing.
D. Retain every patient regardless of available resources.
CORRECT ANSWER: A. Rapidly assess and stabilize the patient, initiate necessary lifesaving care, and
arrange appropriate transfer under established agreements.
RATIONALE Lower-level centers are essential access points for stabilization and timely transfer. Delaying lifesaving care,
retaining patients beyond capability, or transferring without a handoff jeopardizes safety and system continuity.
4. What is the best method for monitoring compliance with a highest-level trauma activation response
requirement?
A. Review the written policy without examining cases.
B. Count only the number of pages sent.
C. Ask team members whether they usually arrive on time.
D. Compare the required response interval with reliable, time-stamped actual arrival data and trend exceptions.
CORRECT ANSWER: D. Compare the required response interval with reliable, time-stamped actual
arrival data and trend exceptions.
RATIONALE Compliance requires a defined denominator, valid timestamps, and case-level comparison with the standard.
Page counts, recollection, and policy review alone do not establish actual performance.
Trauma Systems • Data Management • Conditions of Injury • Coding & Scoring | Page 3
, CSTR | INDEPENDENT PRACTICE RESOURCE
5. What is the principal advantage of a tiered trauma activation system?
A. It permits activation decisions to depend only on bed availability.
B. It eliminates the need for activation criteria.
C. It matches the urgency and composition of the response to predefined patient risk while preserving the ability to
escalate.
D. It guarantees that undertriage cannot occur.
CORRECT ANSWER: C. It matches the urgency and composition of the response to predefined patient risk
while preserving the ability to escalate.
RATIONALE Tiering supports appropriate resource use when criteria are explicit and escalation is available. It does not
remove criteria, eliminate undertriage, or allow operational convenience to replace patient need.
6. In trauma triage, what does undertriage mean?
A. Every trauma patient is transferred to a Level I center.
B. A seriously injured patient receives a lower level of trauma response or destination than the patient’s needs warrant.
C. The registry contains more cases than expected.
D. A minimally injured patient receives a higher-level response.
CORRECT ANSWER: B. A seriously injured patient receives a lower level of trauma response or
destination than the patient’s needs warrant.
RATIONALE Undertriage risks delayed definitive care for seriously injured patients. A high response for a low-risk patient is
overtriage; registry volume and universal transfer are different issues.
7. What is a core responsibility of the trauma medical director?
A. Delegate all clinical accountability to the software vendor.
B. Serve only as a ceremonial committee chair.
C. Personally abstract every registry field.
D. Provide physician leadership and accountability for clinical trauma care and the performance improvement and
patient safety process.
CORRECT ANSWER: D. Provide physician leadership and accountability for clinical trauma care and the
performance improvement and patient safety process.
RATIONALE The trauma medical director leads clinical standards, physician engagement, and PIPS. Registry abstraction can
be delegated to trained staff, but clinical accountability cannot be reduced to a ceremonial or vendor function.
8. Which activity is most characteristic of the trauma program manager role?
A. Control the state’s designation authority.
B. Assign AIS codes without documentation.
C. Replace the trauma medical director for all physician peer review.
D. Coordinate day-to-day trauma program operations, standards readiness, multidisciplinary work, education, and
follow-through on improvement activities.
CORRECT ANSWER: D. Coordinate day-to-day trauma program operations, standards readiness,
multidisciplinary work, education, and follow-through on improvement activities.
RATIONALE The program manager integrates operational, regulatory, educational, and improvement functions. The role
does not authorize unsupported coding, replace physician leadership, or control an external designation agency.
Trauma Systems • Data Management • Conditions of Injury • Coding & Scoring | Page 4
