Blister (nonthermal) of unspecified wrist, initial encounter

This code signifies a non-burn related fluid-filled lesion on an unspecified wrist. It indicates the first time a patient is receiving active treatment for this particular blister.

Apply this code when documentation specifies a blister on the wrist that is not caused by heat, chemicals, or radiation, and the exact wrist (left or right) is not specified. This is appropriate for the initial visit for treatment of the blister.

• Ensure the documentation clearly states the blister is nonthermal and located on the wrist.
• Only use this code when the laterality of the wrist is not specified in the medical record.
• The "A" seventh character indicates an initial encounter for active treatment of the condition.