M87.371

HCC Category Mapping

What This Code Means

Death of bone tissue in the right ankle caused by an underlying condition or treatment such as radiation, corticosteroids, or previous trauma.

Coding Tips

• •Confirm right ankle is the correct site; ankle osteonecrosis may affect talus or other ankle bones
• •Link this code to the documented secondary cause (e.g., post-radiation, post-traumatic) for complete clinical picture

Clinical Significance

This diagnosis represents secondary osteonecrosis of the right ankle caused by underlying conditions such as radiation, corticosteroids, or previous trauma, which can significantly impact mobility and weight-bearing function. It requires management of the underlying cause and monitoring for joint collapse.

Documentation Requirements

• ✓Documentation of osteonecrosis affecting right ankle bones
• ✓Identification of underlying cause (e.g., corticosteroid use, radiation therapy, previous trauma)
• ✓Imaging findings confirming ankle bone necrosis (MRI, X-ray, CT)
• ✓Clinical symptoms such as ankle pain, swelling, or stiffness
• ✓Specific ankle bones affected (talus, calcaneus, etc.)
• ✓Functional limitations affecting walking and weight-bearing
• ✓Duration and progression of condition
• ✓Treatment history including conservative and surgical options

Commonly Confused Codes