Medical Coding Practice Test

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Where is the main term usually located in the ICD-9-CM system?

Volume One
Volume Two
Volume Three
Volume Four

The correct answer is: Volume Two

In the ICD-9-CM system, the main term is usually located in Volume Two. This volume contains the alphabetic index and the main terms for diagnoses, making it easier for coders to locate the specific code they need based on the diagnosis or condition provided. Volumes One and Three contain the tabular list of diagnosis codes and procedure codes, respectively, while Volume Four is used for the classification of diseases for mortality and morbidity statistics.