ICD-10-CM > H60-H95 > H65-H75 > H70 > H70.8 > H70.81 H70.81 Postauricular fistula Non-Billable/Non-Specific Codes H70.811Postauricular fistula, right earH70.812Postauricular fistula, left earH70.813Postauricular fistula, bilateralH70.819Postauricular fistula, unspecified ear