2026 ICD-10-CM Diagnosis Code H66.10Chronic tubotympanic suppurative otitis media, unspecified

ICD-10-CM Codes›H60–H95›H65-H75›H66

ICD-10-CM H66.10
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H66.10 is a billable ICD-10-CM diagnosis code for chronic tubotympanic suppurative otitis media, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 152 through 153. Coders also document this condition as chronic eustachian tube salpingitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Otitis media.

This medical diagnosis code is frequently used in Pediatrics medical specialties to designate conditions such chronic tubotympanic suppurative otitis media.

Code Identity

ICD-10-CM Code
H66.10
Billable Status
Yes — Valid for Submission
Code Describes
Chronic tubotympanic suppurative otitis media, unspecified
Short Description
Chronic tubotympanic suppurative otitis media, unspecified
Same as the full description in the CMS dataset.
Parent Code
H66.1
Chronic tubotympanic suppurative otitis media

Code Classification

ChapterH60–H95Diseases of the ear and mastoid process
SectionH65-H75Diseases of middle ear and mastoid
CategoryH66Suppurative and unspecified otitis media
This CodeH66.10Chronic tubotympanic suppurative otitis media, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic eustachian tube salpingitis
  • Chronic tubotympanic disease with anterior perforation of ear drum
  • Chronic tubotympanic suppurative otitis media
  • Injury of Eustachian tube

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR EAR001
Otitis media
Default principal diagnosis: inpatient Yes · outpatient Yes

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.

Convert H66.10 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
382.1 Chr tubotympan suppur OM
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About H66.10Overview

Is H66.10 (Chronic tubotympanic suppurative otitis media) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report chronic tubotympanic suppurative otitis media, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H66.10 group to?

When chronic tubotympanic suppurative otitis media, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 152, 153, with relative weights from 0.7382 to 1.1822 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of H66.10?

Under the General Equivalence Mappings, chronic tubotympanic suppurative otitis media, unspecified converts to ICD-9-CM 382.1 (chr tubotympan suppur OM). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.