Other calcification of muscle, unspecified lower leg

This code signifies the presence of abnormal calcium deposits within the muscle tissue of an unspecified lower leg, excluding specific types of myositis ossificans. It indicates a non-traumatic, non-inflammatory calcification that is not further specified as progressive or solitary.

Apply this code when documentation confirms calcification within the muscle of the lower leg, but the specific type (e.g., myositis ossificans progressiva, myositis ossificans traumatica) is not identified. This code is appropriate when the laterality of the lower leg (right or left) is not documented by the provider.

• Avoid using this code if the documentation specifies myositis ossificans progressiva (M61.1-) or myositis ossificans traumatica (M61.0-).
• Always strive for greater specificity regarding the type of calcification and laterality (e.g., M61.461 for right lower leg, M61.462 for left lower leg) if available in the medical record.
• Ensure the documentation clearly states "calcification of muscle" to differentiate from calcification of other soft tissues.