Is H66 a billable ICD-10-CM code?

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

Where does H66 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).

H66

H66 — Suppurative and unspecified otitis media

Non-billable headerICD-10-CM

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

Use additional code

Add a secondary code to capture the detail described below.

code to identify:
exposure to environmental tobacco smoke (Z77.22)
exposure to tobacco smoke in the perinatal period (P96.81)
history of tobacco dependence (Z87.891)
occupational exposure to environmental tobacco smoke (Z57.31)
tobacco dependence (F17.-)
tobacco use (Z72.0)

Includes

Conditions this code covers.

suppurative and unspecified otitis media with myringitis

Other codes that can never be billed with H66

These codes carry an Excludes1 note pointing at H66. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading H66 alone.

H65.1Other acute nonsuppurative otitis media
H72Perforation of tympanic membrane
H73.0Acute myringitis
H73.1Chronic myringitis

Risk adjustment

H66 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 H66

6 child codes. Green means billable.

Questions about H66

Is H66 a billable ICD-10-CM code?: No. H66 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does H66 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).