When “7” Is Not a Lucky Number – November 2014
by Margaret M. Maley, BSN, MS
Using the 7th character extension in ICD-10-CM for orthopaedic injuries
The 7th character extension represents a major distinction between the International Classification of Diseases, Ninth Edition (ICD-9) and the International Classification of Diseases, Tenth Edition (ICD-10). A clear understanding of the 7th character is imperative due to its extensive use in orthopaedics.