Displaced comminuted fx shaft of ulna, unsp arm, sequela

This code signifies a past injury involving a comminuted fracture of the ulna shaft, where the bone fragments were displaced. The fracture occurred in an unspecified arm, and the current encounter addresses a long-term complication or residual effect stemming from this old injury.

Apply this code when documenting a patient presenting with a sequela (e.g., chronic pain, nonunion, malunion, limited range of motion, nerve damage) directly attributable to a previously sustained displaced comminuted ulna shaft fracture. This code is appropriate when the initial fracture has healed, but its lasting effects are being treated.

• Always use a seventh character of 'S' for sequela when the patient is being treated for a complication or residual effect of a past injury.
• Ensure documentation clearly links the current condition to the previous ulna fracture.
• Consider additional codes for the specific sequela being treated (e.g., M25.52- for chronic elbow pain, M84.4- for malunion).