Sprain of unspecified ligament of unspecified ankle, sequela

This code signifies a long-term or late-effect complication resulting from a sprain to an unknown ligament in an unspecified ankle. It indicates that the initial injury has resolved, but residual symptoms or conditions persist due to that original sprain.

Apply this code when documentation clearly states a sequela (e.g., chronic pain, instability, limited range of motion) directly attributable to a past, unspecified ankle ligament sprain. This is appropriate when the acute phase of the original injury has passed, and the current encounter addresses these lingering effects.

• Only use this code when the specific ligament and ankle are not documented.
• Ensure the documentation explicitly links the current condition to a previous ankle sprain.
• Always code the specific sequela (e.g., chronic pain, instability) first, followed by this sequela code.