Frostbite with tissue necrosis of unspecified foot, sequela

This code signifies a long-term complication or late effect resulting from frostbite that caused tissue death (necrosis) in an unspecified foot. The initial frostbite injury has resolved, but the patient continues to experience issues directly attributable to the necrotic tissue damage.

This code is appropriate for documenting chronic conditions, deformities, or functional impairments in the foot that are a direct consequence of a past frostbite injury with tissue necrosis. It should be used when the acute phase of the frostbite has passed, and the current encounter addresses these lasting effects.

• Requires a seventh character "S" to indicate sequela, meaning the residual effects of a past injury.
• Do not use for acute frostbite; this code is specifically for the long-term consequences.
• Ensure documentation clearly links the current condition to a previous frostbite event with tissue necrosis.