How are Category II codes structured?

Category II codes are structured as alphanumeric codes that begin with the letter 'F' and are followed by four numeric digits. This coding system is designed to facilitate data collection and tracking of performance measures, particularly in clinical settings. The use of the letter 'F' at the beginning clearly differentiates these codes from other categories in the coding system, such as Category I codes, which are purely numeric and five digits long.

These Category II codes do not represent a specific medical procedure but rather serve as supplementary tracking codes that help in capturing and reporting certain healthcare services and performance measures without billing implications. Therefore, the correct structure of Category II codes adheres strictly to this alphanumeric format starting with 'F', distinguishing their purpose and application in healthcare practice.