2026 ICD-10-CM Diagnosis Code H80.20Cochlear otosclerosis, unspecified ear

ICD-10-CM Codes›H60–H95›H80-H83›H80

ICD-10-CM H80.20
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H80.20 is a billable ICD-10-CM diagnosis code for cochlear otosclerosis, unspecified ear. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 154 through 156. Coders also document this condition as cochlear otosclerosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Diseases of inner ear and related conditions.

Code Identity

ICD-10-CM Code
H80.20
Billable Status
Yes — Valid for Submission
Code Describes
Cochlear otosclerosis, unspecified ear
Short Description
Cochlear otosclerosis, unspecified ear
Same as the full description in the CMS dataset.
Parent Code
H80.2
Cochlear otosclerosis

Code Classification

ChapterH60–H95Diseases of the ear and mastoid process
SectionH80-H83Diseases of inner ear
CategoryH80Otosclerosis
This CodeH80.20Cochlear otosclerosis, unspecified ear

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cochlear otosclerosis
  • Otosclerosis involving otic capsule
  • Otosclerosis involving round window

Clinical ClassificationClinical

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

CCSR EAR003
Diseases of inner ear and related conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Ear Disorders

Your ear has three main parts: outer, middle and inner. You use all of them in hearing. Sound waves come in through your outer ear. They reach your middle ear, where they make your eardrum vibrate. The vibrations are transmitted through three tiny bones, called ossicles, in your middle ear.

Read the full article at MedlinePlus

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Convert H80.20 to ICD-9-CMHistory

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

ICD-9-CM
387.2 Cochlear otosclerosis
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 H80.20Overview

Is H80.20 (Cochlear otosclerosis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report cochlear otosclerosis, unspecified ear on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H80.20 group to?

When cochlear otosclerosis, unspecified ear is the principal diagnosis on an inpatient stay, it groups to MS-DRG 154, 155, 156, with relative weights from 0.6911 to 1.5635 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of H80.20?

Under the General Equivalence Mappings, cochlear otosclerosis, unspecified ear converts to ICD-9-CM 387.2 (cochlear otosclerosis). 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.