H66
⚠ Non-billable
Suppurative and unspecified otitis media
ICD-10-CM · FY2026 · Diseases of the Ear and Mastoid Process
Code
H66
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Ear and Mastoid Process
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
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)
Frequently asked questions
What is ICD-10 code H66?
ICD-10-CM code H66 represents Suppurative and unspecified otitis media. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Ear and Mastoid Process chapter, effective October 1, 2025 – September 30, 2026.
Is H66 billable?
No. H66 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is H66 in?
H66 belongs to the Diseases of the Ear and Mastoid Process chapter (H60–H95) of ICD-10-CM.
Related codes in the H66 category
H66.0
Acute suppurative otitis media
Non-billable
H66.1
Chronic tubotympanic suppurative otitis media
Non-billable
H66.2
Chronic atticoantral suppurative otitis media
Non-billable
H66.3
Other chronic suppurative otitis media
Non-billable
H66.4
Suppurative otitis media, unspecified
Non-billable
H66.9
Otitis media, unspecified
Non-billable
H66.00
Acute suppurative otitis media without spontaneous rupture of ear drum
Non-billable
H66.01
Acute suppurative otitis media with spontaneous rupture of ear drum
Non-billable
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