2026 ICD-10-CM Diagnosis Code H61.813Exostosis of external canal, bilateral

ICD-10-CM Codes›H60–H95›H60-H62›H61

ICD-10-CM H61.813
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H61.813 is a billable ICD-10-CM diagnosis code for exostosis of external canal, bilateral. 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 bilateral exostosis of external ear canals. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified disorders of the ear.

Code Identity

ICD-10-CM Code
H61.813
Billable Status
Yes — Valid for Submission
Code Describes
Exostosis of external canal, bilateral
Short Description
Exostosis of external canal, bilateral
Same as the full description in the CMS dataset.
Parent Code
H61.81
Exostosis of external canal

Code Classification

ChapterH60–H95Diseases of the ear and mastoid process
SectionH60-H62Diseases of external ear
CategoryH61Other disorders of external ear
This CodeH61.813Exostosis of external canal, bilateral

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral exostosis of external ear canals
  • Exostosis of external ear canal
  • Exostosis of left external ear canal
  • Exostosis of right external ear canal
  • Lesion of bilateral external ear canals

Clinical ClassificationClinical

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

CCSR EAR006
Other specified and unspecified disorders of the ear
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

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert H61.813 to ICD-9-CMHistory

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

ICD-9-CM
380.81 Exostosis ext ear canal
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 H61.813Overview

Is H61.813 (Exostosis of external canal) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report exostosis of external canal, bilateral on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H61.813 group to?

When exostosis of external canal, bilateral 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 H61.813?

Under the General Equivalence Mappings, exostosis of external canal, bilateral converts to ICD-9-CM 380.81 (exostosis ext ear canal). 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.