Blister (nonthermal), left great toe, sequela

This code signifies a non-heat-related blister located on the left great toe, indicating a residual effect or complication from an earlier injury or condition. The "sequela" designation means the blister is a late effect, occurring after the acute phase of the original cause has passed.

Apply this code when documenting a patient presenting with a blister on their left great toe that is a long-term consequence of a previous trauma, friction, or other non-thermal event. This is appropriate when the initial injury has resolved, but the blister persists or has developed as a chronic issue.

• Ensure documentation clearly states the blister is on the left great toe and is a sequela of a non-thermal cause.
• Always code the underlying cause of the original injury or condition that led to the sequela, if known and still relevant.
• Do not use this code for acute blisters or blisters caused by burns or frostbite.