Postauricular fistula, unspecified ear

This code signifies the presence of an abnormal, unstated communication tract located behind the auricle (outer ear). This fistula may connect to the skin surface or extend deeper into surrounding tissues, potentially leading to recurrent infections or discharge. The "unspecified ear" designation indicates laterality is not documented.

Use this code when documentation confirms a postauricular fistula but does not specify the affected ear (e.g., "postauricular fistula noted"). It is appropriate when the physician's notes describe the anatomical location of the fistula as posterior to the auricle, without further detail on laterality.

• Avoid using this code if the medical record specifies laterality (e.g., right, left, bilateral); instead, select a more specific code from the H70.81- series.
• Query the provider for laterality if possible to ensure the most specific code is assigned.
• Consider co-reporting codes for any associated complications, such as infection (e.g., L03.811 for cellulitis of the head) or abscess (e.g., L02.811 for cutaneous abscess of head).