ICD-10-CM > H60-H95 > H65-H75 > H70 > H70.2 > H70.22 H70.22 Chronic petrositis Non-Billable/Non-Specific Codes H70.221Chronic petrositis, right earH70.222Chronic petrositis, left earH70.223Chronic petrositis, bilateralH70.229Chronic petrositis, unspecified ear