H70.1
H70.1: Chronic mastoiditis
Non-billable headerICD-10-CM
H70.1 is a non-billable header ICD-10-CM code for chronic mastoiditis. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- tuberculous mastoiditis (A18.03)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Caries of mastoid
- Fistula of mastoid
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead H70.1
4 child codes. Green means billable.