H70.9Non-Billable (Header)Unspecified mastoiditisChild CodesH70.90Unspecified mastoiditis, unspecified earH70.91Unspecified mastoiditis, right earH70.92Unspecified mastoiditis, left earH70.93Unspecified mastoiditis, bilateralCode Hierarchy└H70Mastoiditis and related conditions└H70.9Unspecified mastoiditis└H70.9Unspecified mastoiditis