---
title: "ICD-10-CM H66.90: Otitis media, unspecified, unspecified ear | BillingBrief"
description: "ICD-10-CM code H66.90: Otitis media, unspecified, unspecified ear. Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/h66.90/"
language: "en"
---

# H66.90 Otitis media, unspecified, unspecified ear

ICD-10-CM · [CMS code reference](#source)

**Official ICD-10-CM description:** Otitis media, unspecified, unspecified ear

## Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

### Includes

-   suppurative and unspecified otitis media with myringitis

### Use additional code

Add a second code for the following, when documented.

-   code for any associated perforated tympanic membrane (H72.-)
-   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](https://billingbrief.com/icd10/z87.891/))
-   occupational exposure to environmental tobacco smoke (Z57.31)
-   tobacco dependence (F17.-)
-   tobacco use ([Z72.0](https://billingbrief.com/icd10/z72.0/))

## Related codes

-   [`H66.3X9` Other chronic suppurative otitis media, unspecified ear ICD-10-CM](https://billingbrief.com/icd10/h66.3x9/)
-   [`H66.40` Suppurative otitis media, unspecified, unspecified ear ICD-10-CM](https://billingbrief.com/icd10/h66.40/)
-   [`H66.41` Suppurative otitis media, unspecified, right ear ICD-10-CM](https://billingbrief.com/icd10/h66.41/)
-   [`H66.42` Suppurative otitis media, unspecified, left ear ICD-10-CM](https://billingbrief.com/icd10/h66.42/)
-   [`H66.43` Suppurative otitis media, unspecified, bilateral ICD-10-CM](https://billingbrief.com/icd10/h66.43/)
-   [`H66.91` Otitis media, unspecified, right ear ICD-10-CM](https://billingbrief.com/icd10/h66.91/)
-   [`H66.92` Otitis media, unspecified, left ear ICD-10-CM](https://billingbrief.com/icd10/h66.92/)
-   [`H66.93` Otitis media, unspecified, bilateral ICD-10-CM](https://billingbrief.com/icd10/h66.93/)

## Common questions

### Is H66.90 a billable code?

Yes. H66.90 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

H66 Suppurative and unspecified otitis media

Chapter

Diseases of the ear and mastoid process

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).