Dr. Smith performed an incision and the removal of a foreign body on the left arm in the subcutaneous layer of the skin. What is the correct code to report?

The correct code for the procedure performed by Dr. Smith is 10120. This code is specifically used to describe the incision and removal of a foreign body from the subcutaneous layer of the skin, which matches the details provided in the question. The CPT code 10120 applies to the removal of foreign bodies that are located in the soft tissues, such as the subcutaneous layer, and indicates that this procedure does not involve more extensive measures, such as deeper layer removal or complicated closures.

Additionally, it is important to note how this code fits within its classification. Code 10120 is intended for simple removal, which reflects the procedure's straightforward nature as described. Other codes in the range, such as 10121, 10122, and 10123, are designed for more complex scenarios or additional procedures, such as different depths of incision or when additional foreign bodies are removed. In this scenario, since only one foreign body was removed from a subcutaneous location, 10120 is the most accurate reflection of what was done.