Final answer:
CPT Category I codes are a standardized set of codes used in the U.S. to bill for medical, surgical, and diagnostic services provided by healthcare professionals. They are maintained by the American Medical Association and are the most common set of codes in the CPT system.
Step-by-step explanation:
The CPT Category I codes are used to report billing for procedures and services provided by healthcare professionals. They are a part of the Current Procedural Terminology (CPT) code set that is maintained by the American Medical Association. These codes are a standardized coding system that is used across the United States to describe medical, surgical, and diagnostic services. The CPT Category I codes are the most commonly used set of codes in the CPT system and represent the majority of procedures provided by healthcare providers. These codes are five characters long and are divided into sections such as surgery, radiology, pathology, and medicine, each with unique codes to specify the type of service rendered.