Displ Rolando's fracture, left hand, subs for fx w malunion

This code describes a specific type of fracture affecting the base of the thumb's metacarpal bone (first metacarpal) in the left hand, which has shifted out of its normal alignment. The "subsequent encounter" indicates that the patient is receiving follow-up care for this fracture, and "malunion" signifies that the bone has healed, but in an incorrect or deformed position.

This code is used when a patient presents for ongoing treatment or evaluation of a previously sustained Rolando's fracture of the left hand that has healed with malunion. This could include assessment for pain, functional limitations, or consideration of corrective surgery due to the improper healing. It applies to encounters after the initial treatment phase.

• Ensure documentation clearly specifies "left hand" and "malunion" for accurate code assignment.
• Verify that the encounter is for follow-up care, not the initial treatment of the fracture.
• Distinguish from nonunion (failure to heal) or routine follow-up without malunion.