Medical Coding Practice Test

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.