H66Header code — not billable

Suppurative and unspecified otitis media

Chapter
8. Diseases of the ear and mastoid process
Category
H66
Effective date
October 1, 2026

Related codes in category H66

Frequently asked questions

What is ICD-10 code H66?

H66 is an ICD-10-CM diagnosis code for Suppurative and unspecified otitis media.

Is H66 a billable code?

No. H66 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is H66 in?

H66 falls under Chapter 8: Diseases of the ear and mastoid process.

When did H66 become effective?

H66 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to H66?

H66 belongs to category H66, which includes 12 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.