Medical Coding Practice Test

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When are E codes used in ICD-9-CM?

  1. As primary diagnosis codes

  2. To describe anatomic terms

  3. To show patient's symptoms

  4. For external causes of injury and poisoning

The correct answer is: For external causes of injury and poisoning

E codes, also known as Supplementary Classification of External Causes of Injury and Poisoning codes, are used to describe external causes of injury and poisoning, such as accidents, intentional self-harm, or assaults. They are not used as primary diagnosis codes (A), which describe the patient's main reason for seeking medical care. They also do not describe anatomic terms (B) or the patient's symptoms (C). Therefore, the correct answer is D For external causes of injury and poisoning.

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