M90.511

HCC Category Mapping

What This Code Means

Death of bone tissue in the right shoulder caused by another disease.

Coding Tips

• •Always code the underlying disease (such as sickle cell disease, HIV, or corticosteroid use) in addition to this code
• •Verify laterality is documented as right shoulder before assigning this specific code

Clinical Significance

Secondary osteonecrosis of the right shoulder indicates bone death in a weight-bearing joint caused by underlying systemic disease, requiring aggressive management to preserve joint function. This diagnosis represents significant morbidity with high healthcare resource utilization.

Documentation Requirements

• ✓Underlying disease causing osteonecrosis documented and coded first
• ✓Right shoulder specifically identified as affected site
• ✓Clinical evidence of bone necrosis in shoulder joint
• ✓Imaging studies confirming osteonecrosis (MRI, bone scan, or X-ray)
• ✓Functional assessment of shoulder mobility and strength
• ✓Treatment plan for both underlying condition and bone necrosis
• ✓Staging of osteonecrosis if applicable

Commonly Confused Codes