In what year were five-digit CPT codes introduced?

The introduction of five-digit CPT codes occurred in 1970, marking a significant development in the field of medical coding. Originally, the American Medical Association (AMA) had established the Current Procedural Terminology (CPT) system in 1966, but it was the introduction of the five-digit codes that standardized and expanded the coding system for medical procedures and services. This change was essential for improving the reliability of billing and insurance processes, facilitating clearer communication among healthcare providers, insurance companies, and patients. The five-digit codes could accommodate a wider range of medical services and procedures, reflecting the complexities of healthcare delivery.

Understanding the timeline of CPT code evolution is crucial for comprehending how medical coding has adapted over time to meet the needs of the healthcare system. The introduction of these codes in 1970 helped standardize the coding system for easy reference and usage, paving the way for further updates and revisions in the following decades.