Which of the following is not a separate procedure code?

The code 50600 is not classified as a separate procedure code because it represents a significant procedure that is considered to be integral to the primary service performed. Separate procedure codes are typically used for minor, independent procedures that can be performed independently of the main procedure. In contrast, 50600 is part of a larger process involved in diagnosing or treating a condition, making it inappropriate to classify it as a separate procedure.

The other codes in the list are indeed separate procedure codes, meaning they are designated for specific minor procedures that stand alone and can be billed independently. Understanding the distinction between separate procedure codes and those that are integral to larger treatment plans is crucial for accurate coding and billing practices.