Other osteonecrosis, unspecified bone

This code represents the death of bone tissue due to a lack of blood supply, not specified as occurring in a particular bone. It encompasses various forms of osteonecrosis that do not have a more specific anatomical site or cause identified. This condition can lead to bone collapse and joint destruction if left untreated.

Use this code when documentation confirms osteonecrosis but does not specify the affected bone, or when the osteonecrosis is multifocal and not otherwise classifiable to a more specific site. This code is appropriate when the provider's diagnosis explicitly states "other osteonecrosis" or "osteonecrosis, unspecified bone."

• Avoid using this code if the specific bone affected by osteonecrosis is documented; instead, use a more specific code from the M87 series.
• Query the provider if the documentation indicates osteonecrosis but lacks specificity regarding the affected bone, to determine if a more precise code can be assigned.
• Always code any underlying cause or associated conditions, such as steroid use or trauma, in addition to the osteonecrosis.