Other osteonecrosis, unspecified finger(s)

This code signifies the death of bone tissue in an unspecified finger due to a loss of blood supply, not otherwise specified. It encompasses osteonecrosis of the phalanges or metacarpals of any finger when the specific cause or type is not documented.

Use this code when documentation indicates osteonecrosis affecting a finger, but the specific finger (e.g., thumb, index) is not identified, and the underlying etiology is not specified or is considered "other." This code is appropriate when the physician's notes confirm avascular necrosis of a finger bone without further detail.

• Avoid using this code if the specific finger affected (e.g., left index finger) is documented; instead, use a more specific M87.84- subcategory.
• Ensure documentation clearly states "osteonecrosis" or "avascular necrosis" of a finger.
• Query the provider if the specific finger or the underlying cause of osteonecrosis is known but not documented.