2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Suppurative and unspecified otitis media
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H66: its own notes plus those printed at Chapter 8. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

  • suppurative and unspecified otitis media with myringitis

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 8 (H60-H95) Diseases of the ear and mastoid process applies to 653 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

  • 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)

Notes

General instructions on how these codes are used.

From Chapter 8 (H60-H95) Diseases of the ear and mastoid process applies to 653 codes
  • Use an external cause code following the code for the ear condition, if applicable, to identify the cause of the ear condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name H66, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming H66: they are not reported together with it, unless the two conditions are unrelated.

  • H73.0 Acute myringitis
    acute myringitis with otitis media (H65, H66)
  • H73.1 Chronic myringitis
    chronic myringitis with otitis media (H65, H66)

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About H66Overview

What is the ICD-10 code for suppurative and unspecified otitis media?

H66 is the ICD-10-CM category for suppurative and unspecified otitis media, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Does H66 need an additional code?

When the condition applies, yes. The Use Additional Code note reads: 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.-); and 1 more listed in the Instructional Notes section. The additional code is reported after H66.