Blister (nonthermal), unspecified lesser toe(s), init encntr

This code signifies a non-burn related fluid-filled lesion on any of the lesser toes (toes 2-5) where the specific toe affected is not documented. It indicates the initial presentation or active treatment phase of this condition.

Apply this code when a patient presents with a blister on an unspecified lesser toe, and the blister is not due to heat, chemicals, or radiation. This is appropriate for initial evaluations and treatments, such as drainage or dressing changes, for a newly diagnosed blister.

• Ensure the documentation clearly states the blister is non-thermal and on a lesser toe, without specifying which one.
• Confirm this is the patient's first encounter for this specific blister; subsequent encounters would use the appropriate seventh character.
• If the specific lesser toe is known (e.g., second toe), a more specific code should be used.