M87.234

HCC Category Mapping

What This Code Means

Death of bone tissue in the right forearm bone (ulna) resulting from a previous injury.

Coding Tips

• •The ulna is the medial bone of the forearm; distinguish from radius codes (M87.231-233)
• •Document the history of trauma that led to this osteonecrosis

Clinical Significance

Right ulna osteonecrosis following trauma represents a serious complication affecting forearm stability and rotation. This condition can significantly impact hand and wrist function, often requiring surgical intervention and long-term orthopedic management to prevent further deterioration.

Documentation Requirements

• ✓Documentation of previous trauma specifically to the right ulna
• ✓Imaging evidence demonstrating osteonecrosis of right ulna bone
• ✓Clinical examination findings consistent with ulnar dysfunction
• ✓Exclusion of other causes of osteonecrosis (steroids, alcohol, radiation)
• ✓Documentation of pain, weakness, or functional limitations
• ✓Provider statement establishing causal relationship with trauma
• ✓Timeline connecting previous injury to current necrotic process
• ✓Assessment of impact on forearm pronation/supination

Commonly Confused Codes