2026 ICD-10-CM Diagnosis Code H65.112Acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), left ear

ICD-10-CM Codes›H60–H95›H65-H75›H65

ICD-10-CM H65.112
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H65.112 is a billable ICD-10-CM diagnosis code for acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), left ear. 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 acute allergic otitis media of left middle ear. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Allergic reactions and Otitis media.

This medical diagnosis code is frequently used in Pediatrics medical specialties to designate conditions such other acute nonsuppurative otitis media.

Code Identity

ICD-10-CM Code
H65.112
Billable Status
Yes — Valid for Submission
Code Describes
Acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), left ear
Short Description
Acute and subacute allergic otitis media (serous), left ear
Parent Code
H65.11
Acute and subacute allergic otitis media (mucoid) (sanguinous) (serous)

Code Classification

ChapterH60–H95Diseases of the ear and mastoid process
SectionH65-H75Diseases of middle ear and mastoid
CategoryH65Nonsuppurative otitis media
This CodeH65.112Acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), left ear

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute allergic otitis media of left middle ear
  • Acute allergic serous otitis media
  • Acute serous otitis media of left ear
  • Left acute serous allergic otitis media

Clinical ClassificationClinical

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

CCSR INJ031
Allergic reactions
Default principal diagnosis: inpatient No · outpatient No
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 H65.112 to ICD-9-CMHistory

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

ICD-9-CM
381.02 Ac mucoid otitis media
Approximate The match is approximate rather than exact.
ICD-9-CM
381.03 Ac sanguin otitis media
Approximate The match is approximate rather than exact.
ICD-9-CM
381.04 Ac allergic serous OM
Approximate The match is approximate rather than exact.
ICD-9-CM
381.05 Ac allergic mucoid OM
Approximate The match is approximate rather than exact.
ICD-9-CM
381.06 Ac allerg sanguinous 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 H65.112Overview

Is H65.112 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), left ear on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H65.112 group to?

When acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), left ear 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 H65.112?

Under the General Equivalence Mappings, acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), left ear converts to ICD-9-CM 381.02 (ac mucoid otitis media), 381.03 (ac sanguin otitis media), and 381.04 (ac allergic serous OM). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.