Bent bone of unspecified ulna, sequela

This code describes a permanent deformity or malunion of the ulna, specifically a bent bone, where the exact location on the ulna is not specified. It signifies a long-term consequence of a previous injury or condition affecting the ulna, rather than an acute fracture.

This code is appropriate for documenting the late effects or complications of a previously sustained ulnar injury that resulted in a persistent angulation or curvature of the bone. It should be used when the patient presents for treatment of issues directly related to this established deformity, such as pain, limited range of motion, or cosmetic concerns.

• Always sequence this code after the code for the primary condition or sequela being treated.
• Ensure documentation clearly indicates the "sequela" nature of the bent ulna, distinguishing it from an acute fracture.
• Avoid using this code for acute fractures; instead, use the appropriate acute fracture code.