H66 – Suppurative and unspecified otitis media

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

Non-billable header

ICD-10-CM code H66

Code: H66 (claims format: H66)
Description: Suppurative and unspecified 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

Billable codes under H66

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

H66.0 – Acute suppurative otitis mediaHeader (more codes below)
H66.1 – Chronic tubotympanic suppurative otitis mediaHeader (more codes below)
H66.2 – Chronic atticoantral suppurative otitis mediaHeader (more codes below)
H66.3 – Other chronic suppurative otitis mediaHeader (more codes below)
H66.4 – Suppurative otitis media, unspecifiedHeader (more codes below)
H66.9 – Otitis media, unspecifiedHeader (more codes below)

Notes for H66

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)

Frequently asked questions

What is ICD-10 code H66?

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

Is H66 a billable code?

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

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.