What is the primary purpose of Volume 2 in the ICD-10 codes?

The primary purpose of Volume 2 in the ICD-10 codes is to serve as an instruction manual for coding usage. This volume provides detailed guidelines on how to properly use the codes found in the system, including conventions, instructions, and coding rules that assist healthcare professionals in accurately reporting diagnoses. These guidelines are crucial for ensuring consistency and completeness in the coding process, which ultimately impacts billing, statistics, and the quality of patient care.

The other options, while related to healthcare and coding, do not accurately reflect the function of Volume 2. For instance, Volume 1 contains the tabular list of codes, which is where diagnoses are categorized and coded, while the alphabetical index of diagnoses is typically found in a different volume or section. Additionally, identifying overdue payments is a focus of billing practices rather than coding instructions and elements found within the ICD-10 framework.