2026 ICD-10-CM Diagnosis Code H93.242Temporary auditory threshold shift, left ear

ICD-10-CM Codes›H60–H95›H90-H94›H93

ICD-10-CM H93.242
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H93.242 is a billable ICD-10-CM diagnosis code for temporary auditory threshold shift, 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 hearing loss of left ear caused by noise. 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
H93.242
Billable Status
Yes — Valid for Submission
Code Describes
Temporary auditory threshold shift, left ear
Short Description
Temporary auditory threshold shift, left ear
Same as the full description in the CMS dataset.
Parent Code
H93.24
Temporary auditory threshold shift

Code Classification

ChapterH60–H95Diseases of the ear and mastoid process
SectionH90-H94Other disorders of ear
CategoryH93Other disorders of ear, not elsewhere classified
This CodeH93.242Temporary auditory threshold shift, left ear

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Hearing loss of left ear caused by noise
  • Left temporary auditory threshold shift
  • Temporary auditory threshold shift

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

Hearing Disorders and Deafness

It's frustrating to be unable to hear well enough to enjoy talking with friends or family. Hearing disorders make it hard, but not impossible, to hear. They can often be helped. Deafness can keep you from hearing sound at all.

Read the full article at MedlinePlus

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

Convert H93.242 to ICD-9-CMHistory

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

ICD-9-CM
388.40 Abn auditory percept NOS
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 H93.242Overview

Is H93.242 (Temporary auditory threshold shift) a billable code?

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

What MS-DRG does H93.242 group to?

When temporary auditory threshold shift, 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 H93.242?

Under the General Equivalence Mappings, temporary auditory threshold shift, left ear converts to ICD-9-CM 388.40 (abn auditory percept NOS). 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.