Blister (nonthermal), right lesser toe(s), initial encounter

This code signifies a non-burn related fluid-filled lesion on the right lesser toes. It indicates the initial presentation of such a blister, which could be caused by friction, pressure, or other non-thermal irritants. The blister is superficial and contains serous fluid, differentiating it from deeper tissue injuries.

Apply this code when documenting a patient's first visit for a blister on any of the right lesser toes (toes 2-5) that is not due to heat, cold, or chemical exposure. This is appropriate for blisters resulting from ill-fitting shoes, prolonged walking, or other mechanical trauma. It should be used for the acute phase of the injury.

• Ensure the blister is specifically on the right lesser toes and not the great toe.
• Verify the cause is non-thermal; if thermal, a different code from the T20-T32 series would be appropriate.
• The "A" suffix indicates an initial encounter for treatment; subsequent encounters for the same blister would use a different suffix.