2026 ICD-10-CM Diagnosis Code H83.12Labyrinthine fistula, left ear

ICD-10-CM Codes›H60–H95›H80-H83›H83

ICD-10-CM H83.12
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H83.12 is a billable ICD-10-CM diagnosis code for labyrinthine fistula, left 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 fistula of left labyrinth structure. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Diseases of inner ear and related conditions.

Code Identity

ICD-10-CM Code
H83.12
Billable Status
Yes — Valid for Submission
Code Describes
Labyrinthine fistula, left ear
Short Description
Labyrinthine fistula, left ear
Same as the full description in the CMS dataset.
Parent Code
H83.1
Labyrinthine fistula

Code Classification

ChapterH60–H95Diseases of the ear and mastoid process
SectionH80-H83Diseases of inner ear
CategoryH83Other diseases of inner ear
This CodeH83.12Labyrinthine fistula, left ear

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Fistula of left labyrinth structure
  • Labyrinthine fistula

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

Dizziness and Vertigo

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Convert H83.12 to ICD-9-CMHistory

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

ICD-9-CM
386.40 Labyrinthine fistula NOS
Approximate The match is approximate rather than exact.
ICD-9-CM
386.41 Round window fistula
Approximate The match is approximate rather than exact.
ICD-9-CM
386.42 Oval window fistula
Approximate The match is approximate rather than exact.
ICD-9-CM
386.43 Semicircul canal fistula
Approximate The match is approximate rather than exact.
ICD-9-CM
386.48 Labyrinth fistula comb
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 H83.12Overview

Is H83.12 (Labyrinthine fistula) a billable code?

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

What MS-DRG does H83.12 group to?

When labyrinthine fistula, left 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 H83.12?

Under the General Equivalence Mappings, labyrinthine fistula, left ear converts to ICD-9-CM 386.40 (labyrinthine fistula NOS), 386.41 (round window fistula), and 386.42 (oval window fistula). 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.