Unsp fx shaft of r ulna, subs for opn fx type I/2 w malunion

This code describes a situation where a patient has previously sustained an open fracture of the shaft of their right ulna, which is now healing incorrectly (malunion). The original fracture was classified as either Type I or Type II, indicating a relatively clean break with minimal soft tissue damage. The specific details of the fracture, beyond its location and open nature, are not documented.

Apply this code when documenting follow-up care for a patient with a malunited open fracture of the right ulnar shaft, where the initial injury was a Type I or Type II open fracture. This would be used for subsequent visits after the initial treatment, such as for monitoring healing, planning corrective surgery, or managing complications related to the malunion.

• Requires a seventh character "Q" to indicate a subsequent encounter for malunion.
• Ensure documentation specifies an open fracture of the right ulnar shaft with evidence of malunion.
• Do not use for initial treatment of the fracture; this code is exclusively for subsequent encounters.