Blister (nonthermal), left great toe, initial encounter

This diagnosis code signifies a non-burn related fluid-filled lesion on the great toe of the left foot. It indicates the initial presentation or active treatment phase of such an injury.

This code is appropriate for documenting a patient's first visit or active treatment for a blister on their left great toe caused by friction, pressure, or other non-thermal means. Examples include blisters from ill-fitting shoes or repetitive rubbing.

• Confirm the blister is explicitly on the left great toe and not another digit or foot area.
• Verify the cause is nonthermal; if thermal, a burn code would be more appropriate.
• Ensure this is the initial encounter for this specific injury; subsequent care would use a different encounter character.