M87.035

HCC Category Mapping

What This Code Means

Death of bone tissue in the left ulna (forearm bone) without infection, occurring without a known cause.

Coding Tips

• •Confirm left side is clearly documented in the clinical notes or imaging reports
• •This code is specific to the left ulna; do not use for bilateral or unspecified cases

Clinical Significance

Idiopathic aseptic necrosis of the left ulna involves bone death in the medial forearm without known cause, potentially compromising elbow joint stability and forearm function. This serious orthopedic condition often requires comprehensive management including pain control and possible surgical intervention to maintain arm function.

Documentation Requirements

• ✓Clear documentation of aseptic necrosis affecting left ulna bone
• ✓Confirmation of idiopathic nature without identifiable underlying cause
• ✓Radiological evidence demonstrating bone necrosis in left ulnar bone
• ✓Specific laterality documentation indicating left side involvement
• ✓Clinical exclusion of infectious etiology
• ✓Functional assessment of left elbow and forearm mobility
• ✓Treatment approach documentation including therapeutic interventions
• ✓Pain assessment and impact on activities involving left arm

Commonly Confused Codes