What are the three categories of CPT codes?

The three categories of CPT codes are indeed Category I, Category II, and Category III. Category I codes are the most commonly used and represent the majority of medical, surgical, and diagnostic services and procedures. These codes have a five-digit numeric format and are used for widespread reporting of existing services.

Category II codes are supplementary tracking codes used for performance measurement. These codes are primarily for tracking purposes and do not have a standard five-digit numeric structure, as they typically end with the letter "F."

Category III codes are temporary codes used for new and emerging technologies, services, and procedures that are not yet widely adopted and therefore do not have a permanent Category I code. These codes help in reporting and collecting data on new services.

Understanding the distinctions among these categories is essential for accurate coding and billing in medical practices. Each category serves its purpose in documenting and facilitating patient care and data collection.