H70 Mastoiditis and related conditions
ICD-10-CM category H70 sits in Chapter 8 (Diseases of the ear and mastoid process, H60-H95). It contains 40 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.
Subcategories
H70.0 Acute mastoiditisH70.00 Acute mastoiditis without complicationsH70.01 Subperiosteal abscess of mastoidH70.09 Acute mastoiditis with other complicationsH70.1 Chronic mastoiditisH70.2 PetrositisH70.20 Unspecified petrositisH70.21 Acute petrositisH70.22 Chronic petrositisH70.8 Other mastoiditis and related conditionsH70.81 Postauricular fistulaH70.89 Other mastoiditis and related conditionsH70.9 Unspecified mastoiditis
Billable codes in H70
| Code | Description |
|---|---|
H70.001 | Acute mastoiditis without complications, right ear |
H70.002 | Acute mastoiditis without complications, left ear |
H70.003 | Acute mastoiditis without complications, bilateral |
H70.009 | Acute mastoiditis without complications, unspecified ear |
H70.011 | Subperiosteal abscess of mastoid, right ear |
H70.012 | Subperiosteal abscess of mastoid, left ear |
H70.013 | Subperiosteal abscess of mastoid, bilateral |
H70.019 | Subperiosteal abscess of mastoid, unspecified ear |
H70.091 | Acute mastoiditis with other complications, right ear |
H70.092 | Acute mastoiditis with other complications, left ear |
H70.093 | Acute mastoiditis with other complications, bilateral |
H70.099 | Acute mastoiditis with other complications, unspecified ear |
H70.10 | Chronic mastoiditis, unspecified ear |
H70.11 | Chronic mastoiditis, right ear |
H70.12 | Chronic mastoiditis, left ear |
H70.13 | Chronic mastoiditis, bilateral |
H70.201 | Unspecified petrositis, right ear |
H70.202 | Unspecified petrositis, left ear |
H70.203 | Unspecified petrositis, bilateral |
H70.209 | Unspecified petrositis, unspecified ear |
H70.211 | Acute petrositis, right ear |
H70.212 | Acute petrositis, left ear |
H70.213 | Acute petrositis, bilateral |
H70.219 | Acute petrositis, unspecified ear |
H70.221 | Chronic petrositis, right ear |
H70.222 | Chronic petrositis, left ear |
H70.223 | Chronic petrositis, bilateral |
H70.229 | Chronic petrositis, unspecified ear |
H70.811 | Postauricular fistula, right ear |
H70.812 | Postauricular fistula, left ear |
H70.813 | Postauricular fistula, bilateral |
H70.819 | Postauricular fistula, unspecified ear |
H70.891 | Other mastoiditis and related conditions, right ear |
H70.892 | Other mastoiditis and related conditions, left ear |
H70.893 | Other mastoiditis and related conditions, bilateral |
H70.899 | Other mastoiditis and related conditions, unspecified ear |
H70.90 | Unspecified mastoiditis, unspecified ear |
H70.91 | Unspecified mastoiditis, right ear |
H70.92 | Unspecified mastoiditis, left ear |
H70.93 | Unspecified mastoiditis, bilateral |
Search within ICD-10-CM for H70 and related codes