Frostbite with tissue necrosis of left ankle, sequela

This code signifies a long-term complication resulting from frostbite that previously affected the left ankle, specifically involving tissue death. The necrosis is a permanent or residual effect of the original frostbite injury.

Apply this code when documenting a patient presenting with ongoing issues or conditions directly attributable to a past frostbite injury of the left ankle, where tissue necrosis is a persistent sequela. This is used for encounters where the frostbite itself is no longer an acute injury but its lasting effects are being treated or evaluated.

• Always assign a secondary code for the specific type of necrosis, if known and documented.
• Ensure documentation clearly links the current tissue necrosis to a prior frostbite event of the left ankle.
• Do not use this code for acute frostbite injuries; it is exclusively for sequelae.