Osteonecrosis due to previous trauma, right finger(s)

This code signifies the death of bone tissue in one or more fingers of the right hand, specifically caused by a prior traumatic injury. This condition, also known as avascular necrosis, results from an interruption of blood supply to the bone, leading to bone collapse and potential joint destruction.

Apply this code when documentation clearly states osteonecrosis of the right finger(s) and explicitly links its etiology to a previous traumatic event. This typically occurs following fractures, dislocations, or severe contusions that disrupt vascular flow to the phalanges.

• Ensure the documentation specifies "right" finger(s) and clearly attributes the osteonecrosis to "previous trauma."
• Do not use for osteonecrosis due to other causes (e.g., steroid use, alcoholism); those have different M87 subcategories.
• Code any associated current traumatic injury separately if still active and being treated.