Blister (nonthermal), unspecified ankle, initial encounter

This code signifies a non-burn related blister located on an unspecified ankle. It indicates the initial presentation of this injury, meaning the patient is receiving active treatment for the blister.

Use this code for patients presenting with a blister on the ankle not caused by heat, chemicals, or radiation, where the specific ankle (left or right) is not documented. This is appropriate for the first encounter for treatment of this particular blister.

• Ensure documentation clearly states the blister is nonthermal and the encounter is initial.
• If the specific ankle (left or right) is documented, a more specific code should be used.
• Do not use for blisters caused by burns, frostbite, or other specified external causes.