2026 ICD-10-CM Diagnosis Code H66Suppurative and unspecified otitis media

ICD-10-CM Codes›H60–H95›H65-H75›H66

ICD-10-CM H66
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H66 is a non-billable ICD-10-CM category code for suppurative and unspecified otitis media, so it cannot be submitted on claims. Use a more specific code from this category instead, such as H66.001, H66.002, H66.003, and H66.004.

Code Identity

ICD-10-CM Code
H66
Billable Status
No — Non-Billable Category
Code Describes
Suppurative and unspecified otitis media
Chapter
H65-H75
Diseases of middle ear and mastoid

Code Classification

ChapterH60–H95Diseases of the ear and mastoid process
SectionH65-H75Diseases of middle ear and mastoid
CategoryH66Suppurative and unspecified otitis media
This CodeH66Suppurative and unspecified otitis media

Specific Coding for Suppurative and unspecified otitis mediaOverview

Non-specific codes like H66 require more characters. Use one of these billable codes instead:

  • H66.0 for Acute suppurative otitis media

  • H66.00 for Acute suppurative otitis media without spontaneous rupture of ear drum

  • H66.01 for Acute suppurative otitis media with spontaneous rupture of ear drum

  • H66.1 for Chronic tubotympanic suppurative otitis media

  • Use H66.10 for Chronic tubotympanic suppurative otitis media, unspecified

  • Use H66.11 for Chronic tubotympanic suppurative otitis media, right ear

  • Use H66.12 for Chronic tubotympanic suppurative otitis media, left ear

  • Use H66.13 for Chronic tubotympanic suppurative otitis media, bilateral

  • H66.2 for Chronic atticoantral suppurative otitis media

  • Use H66.20 for Chronic atticoantral suppurative otitis media, unspecified ear

  • Use H66.21 for Chronic atticoantral suppurative otitis media, right ear

  • Use H66.22 for Chronic atticoantral suppurative otitis media, left ear

  • Use H66.23 for Chronic atticoantral suppurative otitis media, bilateral

  • H66.3 for Other chronic suppurative otitis media

  • H66.3X for Other chronic suppurative otitis media

  • H66.4 for Suppurative otitis media, unspecified

  • Use H66.40 for Suppurative otitis media, unspecified, unspecified ear

  • Use H66.41 for Suppurative otitis media, unspecified, right ear

  • Use H66.42 for Suppurative otitis media, unspecified, left ear

  • Use H66.43 for Suppurative otitis media, unspecified, bilateral

  • H66.9 for Otitis media, unspecified

  • Use H66.90 for Otitis media, unspecified, unspecified ear

  • Use H66.91 for Otitis media, unspecified, right ear

  • Use H66.92 for Otitis media, unspecified, left ear

  • Use H66.93 for Otitis media, unspecified, bilateral

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

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

Patient EducationClinical

Ear Infections

Ear infections are the most common reason parents bring their child to a doctor. Three out of four children will have at least one ear infection by their third birthday. Adults can also get ear infections, but they are less common.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About H66Overview

Is H66 (Suppurative and unspecified otitis media) a billable code?

No. This is a category header that groups the codes for suppurative and unspecified otitis media, and headers cannot be submitted on claims. Claims for suppurative and unspecified otitis media need a more specific code from this category, such as H66.001, H66.002, and H66.003.