Unsp fracture of left ilium, subs for fx w nonunion

This code signifies a fracture of the left ilium where the specific type of fracture (e.g., displaced, nondisplaced, comminuted) is not documented. The "subsequent encounter" indicates that the patient is receiving follow-up care for this fracture, and the "nonunion" specifies that the bone fragments have failed to heal together after a reasonable period.

Use this code when documentation confirms a left ilium fracture, but the specific fracture type is not detailed, and the patient is presenting for ongoing treatment of a nonunion. This applies to situations where the initial treatment has failed to achieve bone healing and further intervention or management of the nonunion is being provided.

• Ensure documentation clearly states "left ilium" and "nonunion."
• Only use this code for subsequent encounters; an initial encounter would use a different seventh character.
• Confirm that the fracture type is truly unspecified before using this code; if a type is documented, a more specific code should be chosen.