H66 ICD-10-CM Code: Suppurative and unspecified otitis media
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
H66Suppurative and unspecified otitis media
ICD-10-CM diagnosis code · United States clinical modification
Where H66 sits
- 1
Chapter 8
Diseases of the ear and mastoid process (H60-H95)
- 2
Section
Diseases of middle ear and mastoid (H65-H75)
- 3
Category H66
Suppurative and unspecified otitis media
- 4
Code H66
Suppurative and unspecified otitis media
Codes under H66
H66 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for H66.
Code first
No “code first” instruction is listed for H66.
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)
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for H66.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for H66.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code H66 mean?
H66 is the FY 2027 U.S. ICD-10-CM code for “Suppurative and unspecified otitis media.”
Is H66 a billable or specific ICD-10-CM code?
No. H66 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is H66 located in ICD-10-CM?
H66 is listed in Chapter 8, Diseases of the ear and mastoid process (H60-H95), within Diseases of middle ear and mastoid (H65-H75) (H65–H75), under category H66, Suppurative and unspecified otitis media.
What coding notes are listed for H66?
No inclusion terms are listed for H66 in this reference record. No code-first instruction is listed. Additional-code instructions: 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). No Excludes1 note is listed. No Excludes2 note is listed.