Final answer:
In CPT, Category III codes are used specifically for emerging technologies and are temporary codes designed to facilitate data collection of new procedures that have not yet become widely adopted.
Step-by-step explanation:
In CPT, Category III codes include codes designed to allow for a more standardized coding and billing process for emerging technologies, services, and procedures that are not yet widely adopted or approved by the FDA. These codes are intended to help facilitate data collection and assessment of new services and technologies. Unlike Category I codes, which are used for established and widely accepted procedures, Category III codes are temporary and used specifically for new and experimental procedures. They do not include codes for performance measurement, supplies, drugs, and durable medical equipment, nor are they specifically designated for use by nonphysician practitioners, as each of these has separate considerations in the CPT coding system.