Nondisp comminuted fx shaft of ulna, left arm, sequela

This code describes the long-term effects or complications arising from a comminuted fracture of the shaft of the ulna in the left arm, which was initially nondisplaced. A comminuted fracture means the bone was broken into multiple fragments, and "nondisplaced" indicates the bone fragments remained in their anatomical alignment at the time of the original injury.

This code is appropriate when documenting conditions or symptoms that are a direct consequence of a previously sustained, nondisplaced, comminuted ulnar shaft fracture of the left arm. Examples include chronic pain, malunion, nonunion, limited range of motion, or nerve damage that persists after the acute phase of healing. It should be used for encounters addressing these residual issues, not for the initial injury or routine follow-up during active healing.

• Always assign this code as a secondary diagnosis, following the code for the specific sequela being treated (e.g., M84.222A for delayed union of ulna).
• Ensure documentation clearly links the current condition to the previous ulnar fracture.
• Verify laterality (left arm) and fracture type (comminuted, shaft, nondisplaced) are consistent with the patient's history.