ICD 10 Z Codes and External Causes 2

Question 1

External cause codes in ICD-10-CM are located in which chapter?

Accepted Answer

Chapter 20 (External Causes of Morbidity)

Answer

Chapter 20, coded V00-Y99, covers external causes of morbidity including transport accidents, falls, assaults, and undetermined intent.

Question 2

Which external cause code category describes the activity the patient was engaged in at the time of injury?

Accepted Answer

Y93 – Activity codes

Answer

Y93 activity codes specify what the patient was doing when injured, such as swimming, walking, or playing a sport.

Question 3

Which external cause code category identifies the place where an injury occurred?

Accepted Answer

Y92 – Place of occurrence

Answer

Y92 codes capture the specific place of occurrence such as the patient's home, a highway, a school, or a public building.

Question 4

Transport accident external cause codes in ICD-10-CM begin with which letter?

Accepted Answer

V

Answer

V00-V99 codes cover transport accidents including motor vehicle crashes, pedestrian injuries, and other vehicle-related incidents.

Question 5

External cause codes should be sequenced as:

Accepted Answer

Secondary codes — they are never sequenced as the principal diagnosis

Answer

Per ICD-10-CM guidelines, external cause codes are always supplemental secondary codes and may never be the principal or first-listed diagnosis.

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