Other osteonecrosis, unspecified toe(s)

This diagnosis code signifies the death of bone tissue in an unspecified toe due to a loss of blood supply, not otherwise specified. This condition can lead to pain, joint collapse, and functional impairment in the affected digit. It encompasses various forms of osteonecrosis that don't fit more specific categories.

Apply this code when documentation clearly indicates osteonecrosis of a toe, but the specific type or cause (e.g., traumatic, corticosteroid-induced) is not identified, and the specific toe (e.g., great toe, lesser toe) is also not documented. Supporting documentation would include imaging reports (X-ray, MRI) confirming osteonecrosis and physician notes indicating the affected area as "toe(s)" without further specificity.

• Avoid using this code if the specific toe is documented; instead, use a more precise code from the M87.87- subcategory (e.g., M87.871 for great toe).
• Ensure the documentation explicitly states "osteonecrosis" and not just "bone infarct" or "avascular necrosis" without further context.
• Always look for an underlying cause if documented, as a more specific secondary diagnosis code may be appropriate (e.g., M87.1- for drug-induced osteonecrosis).