LeFort I fracture, subs for fx w delay heal

This code signifies a LeFort I fracture of the maxilla that is currently undergoing treatment, but healing is progressing slower than anticipated. This type of fracture involves a horizontal separation of the maxilla from the pterygoid plates and nasal septum, typically requiring surgical stabilization. The "subsequent encounter" indicates that the patient is receiving follow-up care for this previously diagnosed injury.

Apply this code for patients presenting for follow-up appointments, cast changes, or ongoing management of a LeFort I fracture where the provider explicitly documents "delayed healing." Documentation should clearly state the fracture's delayed progression, often supported by imaging studies showing incomplete callus formation or persistent fracture lines beyond the expected healing timeframe.

• Ensure the documentation clearly specifies "delayed healing" for the LeFort I fracture; otherwise, use a routine subsequent encounter code.
• Always sequence this code after the primary external cause code (e.g., W00-Y38) if applicable, and any associated complications.
• Do not confuse with nonunion or malunion, which have distinct ICD-10-CM codes and imply different stages of healing failure.