Blister (nonthermal) of right thumb, initial encounter

This code signifies a non-heat-related fluid-filled lesion on the right thumb. This type of blister typically results from friction, pressure, or contact with irritants, rather than burns. It indicates the very first time this specific injury is being treated.

Apply this code when documenting a patient presenting with a blister on their right thumb that is not caused by thermal injury. This is appropriate for initial evaluations and treatments of such a blister, for example, from repetitive gripping or a chemical irritant.

• Ensure the documentation clearly states the blister is non-thermal and located on the right thumb.
• Verify this is the patient's first encounter for this specific injury; subsequent encounters will require a different seventh character.
• Look for associated documentation of the cause of the blister to potentially assign an external cause code.