Is H70.1 a billable ICD-10-CM code?

No. H70.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does H70.1 sit in the tabular list?

Diseases of the ear and mastoid process (H60-H95), in the block Diseases of middle ear and mastoid (H65-H75).

What cannot be coded together with H70.1?

H70.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

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

H70.1 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead H70.1

4 child codes. Green means billable.

Related codes at this level

Codes that share H70. If H70.1 is not quite right, the correct code is usually one of these.

Questions about H70.1

Is H70.1 a billable ICD-10-CM code?: No. H70.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does H70.1 sit in the tabular list?: Diseases of the ear and mastoid process (H60-H95), in the block Diseases of middle ear and mastoid (H65-H75).
What cannot be coded together with H70.1?: H70.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.