Blister (nonthermal) of left ear, initial encounter

This code signifies a non-thermal blister formation affecting the left ear. This typically involves a fluid-filled lesion on the auricle or external auditory canal, not caused by heat, cold, or chemical exposure.

Apply this code when documentation clearly indicates a blister on the left ear resulting from mechanical friction, pressure, or other non-thermal etiologies. This is for the initial treatment or active phase of care for the blister.

• Ensure documentation specifies "nonthermal" to differentiate from burn blisters.
• Verify laterality (left ear) is explicitly stated; separate codes exist for the right or unspecified ear.
• Confirm this is the initial encounter for this specific blister; subsequent encounters require a different seventh character.