Superficial frostbite of left knee and lower leg, sequela

This code signifies a lasting effect or complication resulting from a superficial frostbite injury to the left knee and/or lower leg. It indicates that the initial frostbite has resolved, but the patient is still experiencing residual symptoms or conditions directly attributable to that past injury.

Apply this code when documenting a patient presenting with a current condition, such as chronic pain, numbness, skin discoloration, or altered sensation, that is a direct consequence of a previously sustained superficial frostbite to their left knee or lower leg. This code is appropriate for follow-up encounters addressing these long-term sequelae.

• Requires a seventh character "S" to indicate sequela, meaning the initial injury has healed but its effects persist.
• Do not use for acute frostbite; use only for residual conditions.
• Code any current, specific symptoms or conditions related to the sequela in addition to this code.