Superficial frostbite of unspecified ankle, sequela

This code signifies the long-term effects or complications arising from a superficial frostbite injury to an unspecified ankle. It indicates that the initial frostbite event has resolved, but the patient is now experiencing residual issues directly attributable to that past injury.

Apply this code when documenting conditions such as chronic pain, numbness, hypersensitivity, or skin changes in the ankle that are a direct consequence of a previously sustained superficial frostbite. This code is appropriate for follow-up encounters addressing these persistent sequelae, rather than the acute injury itself.

• Always use this code as a secondary diagnosis, following the code for the specific sequela being treated (e.g., chronic pain).
• Ensure documentation clearly links the current ankle condition to a past superficial frostbite event.
• The "S" in the 7th character indicates sequela; do not use for active frostbite treatment.