Nondisp fx of base of unsp MC bone, subs for fx w malunion

This code signifies a follow-up encounter for a previously diagnosed fracture at the base of an unspecified metacarpal bone. The fracture was initially nondisplaced, but during the healing process, it has united in an anatomically incorrect position, known as malunion.

Apply this code when a patient presents for ongoing care of a metacarpal base fracture that has healed with malunion. This is appropriate for subsequent visits after the initial treatment, such as for evaluation of function, pain management, or planning for corrective surgery related to the malunion.

• This code is for a subsequent encounter; do not use for the initial treatment of the fracture.
• The "P" seventh character indicates a subsequent encounter for a fracture with malunion.
• Ensure documentation clearly states malunion and the specific metacarpal, if known, to avoid using the "unspecified" option.