Is H66.3X a billable ICD-10-CM code?

No. H66.3X is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does H66.3X 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 H66.3X?

H66.3X carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above H66.3X (H66.3) and apply to it just the same.

H66.3X

H66.3X — Other chronic suppurative otitis media

Non-billable headerICD-10-CM

H66.3X is a non-billable header ICD-10-CM code for other chronic suppurative otitis media. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above H66.3X

These are not written on H66.3X, but they bind it: a note on a category applies to every code beneath it. Billing H66.3X with anything listed here is a denial.

Written on H66.3 — Other chronic suppurative otitis media

tuberculous otitis media (A18.6)

Risk adjustment

H66.3X 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 history

H66.3X has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead H66.3X

4 child codes. Green means billable.

Questions about H66.3X

Is H66.3X a billable ICD-10-CM code?: No. H66.3X is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does H66.3X 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 H66.3X?: H66.3X carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above H66.3X (H66.3) and apply to it just the same.