Corrosion of unsp deg mult sites of right ank/ft, sequela

This code signifies the long-term effects or complications arising from a chemical burn (corrosion) that affected multiple areas of the right ankle and foot. The original burn's severity is not specified, and this code is used to report conditions that are residual to the initial injury, such as scarring, chronic pain, or functional limitations.

Use this code when documenting a patient presenting with a current condition directly resulting from a past corrosion injury to the right ankle and foot. This applies to follow-up encounters for chronic issues like contractures, nerve damage, or non-healing ulcers that are a direct consequence of the original chemical burn.

• Requires a seventh character "S" to indicate sequela, meaning the residual effect of a past injury.
• Do not use for acute or initial treatment of the corrosion; this code is for complications or conditions arising after the initial injury has healed.
• Always code the specific sequela (e.g., scar, chronic pain) in addition to this code, if known.