Unspecified injury of unspecified ankle, sequela

This code signifies a long-term or late effect of an unspecified injury to an unspecified ankle. It indicates that the specific nature of the original ankle injury is unknown, and the exact ankle (left or right) is also not documented, but the patient is experiencing residual symptoms or conditions from that past injury.

This code is appropriate when documentation clearly states a sequela of an ankle injury, but lacks specificity regarding the type of injury (e.g., fracture, sprain, dislocation) and laterality. It should be used when the original injury occurred in the past and the patient is now presenting with a chronic condition directly attributable to that injury.

• Always attempt to query for more specific information regarding the type of ankle injury and laterality before resorting to this code.
• This code should only be used as a secondary diagnosis, following the code for the specific sequela (e.g., chronic pain, arthritis).
• Avoid using this code if the original injury is still acute or subacute; an acute injury code with a "S" seventh character for sequela is for the current treatment of a sequela, not for the sequela itself.