Other osteonecrosis, left femur

This code signifies the death of bone tissue in the left femur due to a loss of blood supply, not otherwise specified as spontaneous, drug-induced, or post-traumatic. This condition can lead to bone collapse and subsequent arthritis if left untreated. It encompasses various etiologies of osteonecrosis affecting the left thigh bone.

Use this code when documentation specifies osteonecrosis of the left femur, and the specific type (e.g., spontaneous, drug-induced, post-traumatic) is not clearly identified or falls outside of other specific osteonecrosis codes. Supporting documentation should include imaging reports (MRI, X-ray) confirming osteonecrosis and physician notes detailing the affected site and ruling out more specific causes.

• Always specify laterality; this code is for the left femur only.
• Review documentation carefully for a more specific type of osteonecrosis (e.g., M87.152 for drug-induced) before defaulting to this "other" code.
• Consider sequencing with codes for underlying conditions that may contribute to osteonecrosis, such as systemic lupus erythematosus or sickle cell anemia.