HCD Healthcare Payment and Delivery Models Exam 2 Practice 2026 – Comprehensive Test Preparation

Category III CPT codes are temporary alphanumeric codes used to track new and developing technologies, procedures, and services. They are five characters long and end with the letter T to signal their temporary status. The purpose is to collect data on emerging practices before there is enough evidence or consensus to create a permanent Category I code. This helps providers, payers, and researchers assess adoption, safety, effectiveness, and utilization, and those codes may be converted to Category I if the service becomes established. By contrast, permanent, standard procedures fall under Category I, while codes specifically for performance measurement are Category II. Immunization-related coding is not categorized as Category III.