H66.90 ICD-10-CM Code: Otitis media, unspecified, unspecified ear
H66.90 is the billable ICD-10-CM code for “Otitis media, unspecified, unspecified ear” in the FY 2027 U.S. code set, effective Oct 1, 2026.
Official description
H66.90Otitis media, unspecified, unspecified ear
ICD-10-CM diagnosis code · United States clinical modification
Coding tips for H66.90
The same condition with the side named
This code leaves the side unspecified, which should be rare. When the note says which side, use that side’s code.
Where H66.90 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
Subcategory H66.9
Otitis media, unspecified
- 5
Code H66.90
Otitis media, unspecified, unspecified ear
Notes for this code
Inclusion terms
No inclusion terms are listed for H66.90.
Code first
No “code first” instruction is listed for H66.90.
Use additional code
No “use additional code” instruction is listed for H66.90.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for H66.90.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for H66.90.
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 H66.90 mean?
H66.90 is the FY 2027 U.S. ICD-10-CM code for “Otitis media, unspecified, unspecified ear.”
Is H66.90 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, H66.90 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is H66.90 located in ICD-10-CM?
H66.90 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 and subcategory H66.9, Otitis media, unspecified.
What coding notes are listed for H66.90?
No inclusion terms are listed for H66.90 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.