Skip to content
Dx

ICD-10-CM 2027 diagnosis code

H66Suppurative and unspecified otitis media

Not billable — use a more specific code

H66 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About H66

H66 is the ICD-10-CM diagnosis code for suppurative and unspecified otitis media. It belongs to block H65-H75 (diseases of middle ear and mastoid) and chapter 8 (diseases of the ear and mastoid process). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: H66.0 (media), H66.1 (media), H66.2 (media), H66.3 (media), H66.4 (unspecified) and H66.9 (unspecified).

Use an additional 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.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under H66

Coding notes

IncludesFurther defines the content of the category
  • suppurative and unspecified otitis media with myringitis
Use additional codeAdd a secondary code 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 that apply from higher levels

Instructions written at a parent level also apply to H66.

Broader instructions also apply from Chapter 8: Diseases of the ear and mastoid process.

Codes whose notes reference H66

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about H66

Is H66 billable?

No. H66 is a header code. Report one of its more specific subcodes instead.