Chilblains, initial encounter

This code describes a localized inflammatory skin condition resulting from prolonged exposure to cold, non-freezing temperatures, often accompanied by dampness. It typically presents as itchy, red, swollen, and sometimes blistering lesions on the extremities, such as fingers, toes, ears, and nose.

Use this code for the initial diagnosis and treatment of chilblains (pernio) when a patient presents with the characteristic skin lesions due to cold exposure. This applies to the first encounter for a new episode of chilblains or when the patient is actively receiving treatment for the condition.

• Ensure documentation clearly states the condition is chilblains and not frostbite or another cold-related injury.
• Confirm this is the initial encounter for the specific episode of care; subsequent encounters will require a different seventh character.
• Look for documentation of cold exposure as the causative factor.