ICD-10-CM > H60-H95 > H65-H75 > H70 > H70.0 H70.0 Acute mastoiditis Non-Billable/Non-Specific Applicable To Abscess of mastoidEmpyema of mastoid Codes H70.00Acute mastoiditis without complicationsH70.001Acute mastoiditis without complications, right earH70.002Acute mastoiditis without complications, left earH70.003Acute mastoiditis without complications, bilateralH70.009Acute mastoiditis without complications, unspecified earH70.01Subperiosteal abscess of mastoidH70.011Subperiosteal abscess of mastoid, right earH70.012Subperiosteal abscess of mastoid, left earH70.013Subperiosteal abscess of mastoid, bilateralH70.019Subperiosteal abscess of mastoid, unspecified earH70.09Acute mastoiditis with other complicationsH70.091Acute mastoiditis with other complications, right earH70.092Acute mastoiditis with other complications, left earH70.093Acute mastoiditis with other complications, bilateralH70.099Acute mastoiditis with other complications, unspecified ear