H70Header code — not billable
Mastoiditis and related conditions
- Chapter
- 8. Diseases of the ear and mastoid process
- Category
- H70
- Effective date
- October 1, 2026
Related codes in category H70
H70.0Acute mastoiditisH70.00Acute mastoiditis without complicationsH70.001Acute mastoiditis without complications, right earYesH70.002Acute mastoiditis without complications, left earYesH70.003Acute mastoiditis without complications, bilateralYesH70.009Acute mastoiditis without complications, unspecified earYesH70.01Subperiosteal abscess of mastoidH70.011Subperiosteal abscess of mastoid, right earYesH70.012Subperiosteal abscess of mastoid, left earYesH70.013Subperiosteal abscess of mastoid, bilateralYesH70.019Subperiosteal abscess of mastoid, unspecified earYesH70.09Acute mastoiditis with other complications
Frequently asked questions
What is ICD-10 code H70?
H70 is an ICD-10-CM diagnosis code for Mastoiditis and related conditions.
Is H70 a billable code?
No. H70 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is H70 in?
H70 falls under Chapter 8: Diseases of the ear and mastoid process.
When did H70 become effective?
H70 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to H70?
H70 belongs to category H70, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.