Corrosion of second degree of unspecified ankle, sequela

This code signifies a past, resolved second-degree corrosive burn (chemical burn) affecting an unspecified ankle, where the patient is now experiencing a long-term complication or residual effect directly attributable to that injury. These sequelae could include chronic pain, scarring, contractures, or functional limitations that persist after the initial healing of the corrosion.

Apply this code when documenting a patient presenting with a current condition or symptom that is a direct consequence of a second-degree chemical burn to the ankle that occurred in the past. This code is appropriate for follow-up visits addressing the chronic effects of such an injury, not the initial acute treatment.

• Requires an additional code to specify the nature of the sequela (e.g., scar, contracture, chronic pain).
• Only use for conditions that are a direct, lasting result of the original corrosion, not new, unrelated issues.
• The "S" in the 7th character indicates sequela, meaning the initial injury has healed and the patient is experiencing a late effect.