Nondisp fx of pisiform, unsp wrist, subs for fx w malunion

This code signifies a non-displaced fracture of the pisiform bone, located in the wrist, that is currently in a healing phase but is developing an imperfect union of the bone fragments. The specific wrist (left or right) is not documented.

Use this code for follow-up encounters where a patient is being treated for a pisiform fracture that was initially non-displaced, and imaging or clinical assessment indicates malunion is occurring. This applies when the laterality of the wrist is not specified in the medical record.

• Requires an associated external cause code if the injury was due to trauma.
• Confirm documentation explicitly states "malunion" and "subsequent encounter" for accurate code assignment.
• Always query for laterality if not documented to ensure the most specific code can be assigned.