Blister (nonthermal) of left ear, subsequent encounter

This code signifies a non-thermal blister located on the patient's left ear, being treated during a subsequent encounter. A non-thermal blister is typically caused by friction, pressure, or a chemical irritant, as opposed to burns from heat or cold. The "subsequent encounter" indicates ongoing care for the initial injury.

Use this code when a patient presents for follow-up care, such as wound checks, dressing changes, or medication adjustments, for a non-thermal blister on the left ear. Documentation should clearly state the blister's non-thermal origin, its location on the left ear, and that the visit is not for the initial treatment of the injury.

• Ensure documentation specifies "left ear" and "non-thermal" to differentiate from other ear injuries or blister types.
• Verify the encounter type is "subsequent" (D) and not initial (A) or sequela (S).
• Consider an external cause code (V00-Y99) if the cause of the non-thermal blister is known and documented.