M87.334

HCC Category Mapping

What This Code Means

Death of bone tissue in the right forearm bone (ulna) caused by an underlying condition or injury, resulting in bone deterioration and potential collapse.

Coding Tips

• •Verify the underlying cause of osteonecrosis (trauma, radiation, corticosteroid use, etc.) as this may require an additional code
• •Ensure laterality is correctly documented as 'right' to distinguish from left or unspecified ulna codes

Clinical Significance

Secondary osteonecrosis of the right ulna represents bone death from identifiable non-traumatic causes affecting forearm stability and rotation. This condition can significantly impair wrist and hand function, often requiring complex treatment approaches to address both the underlying cause and bone pathology.

Documentation Requirements

• ✓Documentation of underlying secondary cause of osteonecrosis
• ✓Imaging confirmation of osteonecrosis in right ulna
• ✓Clinical examination showing right forearm dysfunction
• ✓History of predisposing factors such as steroids or radiation
• ✓Exclusion of traumatic and idiopathic etiologies
• ✓Documentation of pain, weakness, or limited range of motion
• ✓Provider statement identifying secondary nature of condition
• ✓Evidence of bone death through diagnostic imaging

Commonly Confused Codes