Blister (nonthermal) of right ear, initial encounter

This code signifies a non-burn related fluid-filled lesion on the external surface of the patient's right ear. It indicates a localized collection of fluid under the epidermis, not caused by heat, cold, or chemical exposure.

Apply this code when documentation specifies a blister on the right ear that is explicitly stated as non-thermal in origin. This is appropriate for the initial treatment or evaluation of such a lesion, often seen with friction, pressure, or allergic reactions.

• Ensure the documentation clearly specifies "nonthermal" to differentiate from burn blisters.
• Verify laterality; this code is specific to the right ear.
• The "A" suffix indicates an initial encounter, meaning the patient is receiving active treatment for the condition.