Nondisp fx of pisiform, right wrist, subs for fx w nonunion

This code describes a right wrist pisiform bone fracture that has not healed properly and is being treated in a subsequent encounter. The fracture itself is not displaced, meaning the bone fragments are still in their normal anatomical alignment despite the nonunion.

Apply this code when a patient presents for follow-up care, such as cast changes, physical therapy, or surgical planning, for a previously diagnosed nondisplaced pisiform fracture of the right wrist that has failed to unite. This indicates ongoing management of a complicated healing process.

• Always sequence this code after the primary reason for the encounter, if applicable.
• Ensure documentation clearly states "nonunion" and specifies the "right wrist" and "pisiform" bone.
• Verify that the encounter is indeed "subsequent" and not the initial treatment for the fracture.