Until when was the ICD-9-CM code in use in the United States?

The ICD-9-CM coding system was utilized in the United States until October 1, 2015. The transition to ICD-10 codes represented a significant update in medical coding, incorporating more detailed and specific codes to better capture the nuances of patient diagnoses and treatments. This change was essential for improving the accuracy of data related to health statistics, billing, and care management.

ICD-9-CM had been in use for many years prior to this transition but was ultimately phased out to accommodate the more complex healthcare environment and the increased need for precision in coding. The year 2015 is a critical milestone in this timeline, marking the end of ICD-9-CM's relevance in favor of the more contemporary ICD-10 standards.