Osteonecrosis due to previous trauma, right femur

This code signifies the death of bone tissue in the right thigh bone (femur) resulting from a prior traumatic injury. This condition, also known as avascular necrosis, occurs when the blood supply to the bone is disrupted, leading to bone collapse and potential joint destruction.

Apply this code when documentation explicitly states osteonecrosis of the right femur and clearly links its etiology to a previous traumatic event. This includes fractures, dislocations, or other significant injuries that compromised the femoral blood supply.

• Ensure the documentation specifies "right femur" and a clear causal link to "previous trauma."
• Do not use this code for osteonecrosis due to non-traumatic causes (e.g., steroid use, alcoholism); those have different etiologic codes.
• Sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if it's a co-morbidity impacting treatment.