Medical Coding Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

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What do slanted square brackets indicate in ICD-9-CM coding?

Correct order of coding sequences

Underlying condition and manifestation

Slanted square brackets in ICD-9-CM coding indicate an underlying condition and manifestation. This means that the code within the brackets is used to identify the underlying disease or condition, while the code outside the brackets describes the manifestation or symptoms of that condition. This coding method helps to provide a more detailed and accurate representation of a patient's diagnosis. Options A, C, and D are incorrect because slanted square brackets do not indicate the correct order of coding sequences, principal diagnosis codes, or footnote requirements for categories in ICD-9-CM coding. It is important to use the correct coding conventions to ensure accurate and specific coding for medical records.

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Principal diagnosis codes

Footnote requirement for categories

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