Blister of left eyelid and periocular area, init

This code signifies a non-thermal blister located on the left eyelid or the surrounding periocular region. This injury is characterized by a fluid-filled lesion on the skin, not caused by heat, chemicals, or radiation.

Apply this code for the initial treatment of a blister on the left eyelid or periocular area resulting from mechanical friction, irritation, or other non-thermal causes. Documentation should clearly specify the left side, the non-thermal etiology, and that this is the first encounter for this specific injury.

• Ensure documentation explicitly states "left eyelid" or "left periocular area" and confirms a non-thermal cause.
• Distinguish from thermal blisters (e.g., burns), which are coded differently.
• Always verify the encounter type (initial, subsequent, sequela) to select the correct 7th character.