Blister (nonthermal), right great toe, initial encounter

This diagnosis code indicates the presence of a non-burn related fluid-filled lesion on the right great toe. This blister is not caused by heat, cold, or chemical exposure, but rather by friction, pressure, or other mechanical forces. It represents the initial presentation of this specific injury.

This code is appropriate for documenting a patient's first visit for a blister on their right great toe that is not due to thermal causes. Examples include blisters from ill-fitting shoes, prolonged walking, or repetitive rubbing. It should be used when the patient is receiving active treatment for the blister.

• Ensure the documentation specifies the right great toe and confirms the non-thermal etiology.
• Verify that this is indeed the initial encounter for this specific injury; subsequent encounters will require a different seventh character.
• Distinguish from thermal blisters (e.g., burns), which are coded differently.