H66.3X – Other chronic suppurative otitis media

ICD-10-CM 2027 diagnosis code · Diseases of middle ear and mastoid

Non-billable header

ICD-10-CM code H66.3X

Code: H66.3X (claims format: H663X)
Description: Other chronic suppurative otitis media
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 8. Diseases of the ear and mastoid process (H60-H95)
Block: H65-H75 Diseases of middle ear and mastoid
Parent codes: H66 › H66.3

Billable codes under H66.3X

H66.3X is a header code and cannot be used on claims. Choose the most specific code:

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

H66 – Suppurative and unspecified otitis media

Includes:

suppurative and unspecified otitis media with myringitis

Use additional code:

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)

H66.3 – Other chronic suppurative otitis media

Applicable to:

Chronic suppurative otitis media NOS

Excludes1 (not coded here):

tuberculous otitis media (A18.6)

Use additional code:

code for any associated perforated tympanic membrane (H72.-)

Frequently asked questions

What is ICD-10 code H66.3X?

H66.3X is the ICD-10-CM code for other chronic suppurative otitis media, in the block H65-H75 (Diseases of middle ear and mastoid).

Is H66.3X a billable code?

No. H66.3X is a header code with more specific child codes; report one of the billable codes listed above.

What category does H66.3X belong to?

It belongs to category H66 – Suppurative and unspecified otitis media.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.