Frostbite of foot

This code signifies tissue damage to the foot resulting from prolonged exposure to freezing temperatures. It encompasses all degrees of frostbite, from superficial skin involvement to deep tissue necrosis, specifically affecting the pedal extremity. The injury occurs when ice crystals form within cells, leading to cellular damage and impaired blood flow.

Use this code when documentation clearly indicates a diagnosis of frostbite localized to any part of the foot (e.g., toes, instep, heel). This applies to acute presentations following cold exposure, as well as sequelae such as blistering, numbness, or tissue loss directly attributable to the freezing injury of the foot.

• Ensure documentation specifies the foot as the affected body part; otherwise, a more general frostbite code may be appropriate.
• Do not confuse with chilblains (pernio) or trench foot, which are distinct cold-induced injuries.
• Code any associated open wounds or tissue necrosis separately, if applicable, following sequencing guidelines for complications.