ICD-10-CM > H60-H95 > H65-H75 > H70 > H70.8 > H70.89 H70.89 Other mastoiditis and related conditions Non-Billable/Non-Specific Codes H70.891Other mastoiditis and related conditions, right earH70.892Other mastoiditis and related conditions, left earH70.893Other mastoiditis and related conditions, bilateralH70.899Other mastoiditis and related conditions, unspecified ear