ICD-10-CM category
H70 Mastoiditis and related conditions
H70 is a category, not a billable code. Report one of the 40 complete codes below.
Codes in H70
- H70.001Acute mastoiditis without complications, right ear
- H70.002Acute mastoiditis without complications, left ear
- H70.003Acute mastoiditis without complications, bilateral
- H70.009Acute mastoiditis without complications, unspecified ear
- H70.011Subperiosteal abscess of mastoid, right ear
- H70.012Subperiosteal abscess of mastoid, left ear
- H70.013Subperiosteal abscess of mastoid, bilateral
- H70.019Subperiosteal abscess of mastoid, unspecified ear
- H70.091Acute mastoiditis with other complications, right ear
- H70.092Acute mastoiditis with other complications, left ear
- H70.093Acute mastoiditis with other complications, bilateral
- H70.099Acute mastoiditis with other complications, unspecified ear
- H70.10Chronic mastoiditis, unspecified ear
- H70.11Chronic mastoiditis, right ear
- H70.12Chronic mastoiditis, left ear
- H70.13Chronic mastoiditis, bilateral
- H70.201Unspecified petrositis, right ear
- H70.202Unspecified petrositis, left ear
- H70.203Unspecified petrositis, bilateral
- H70.209Unspecified petrositis, unspecified ear
- H70.211Acute petrositis, right ear
- H70.212Acute petrositis, left ear
- H70.213Acute petrositis, bilateral
- H70.219Acute petrositis, unspecified ear
- H70.221Chronic petrositis, right ear
- H70.222Chronic petrositis, left ear
- H70.223Chronic petrositis, bilateral
- H70.229Chronic petrositis, unspecified ear
- H70.811Postauricular fistula, right ear
- H70.812Postauricular fistula, left ear
- H70.813Postauricular fistula, bilateral
- H70.819Postauricular fistula, unspecified ear
- H70.891Other mastoiditis and related conditions, right ear
- H70.892Other mastoiditis and related conditions, left ear
- H70.893Other mastoiditis and related conditions, bilateral
- H70.899Other mastoiditis and related conditions, unspecified ear
- H70.90Unspecified mastoiditis, unspecified ear
- H70.91Unspecified mastoiditis, right ear
- H70.92Unspecified mastoiditis, left ear
- H70.93Unspecified mastoiditis, bilateral
Outside the US? H70 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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