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ICD-10-CM 2027 diagnosis code

H93.243Temporary auditory threshold shift, bilateral

✓ Billable / specific

H93.243 is a valid, billable ICD-10-CM code for temporary auditory threshold shift, bilateral. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About H93.243

H93.243 is the ICD-10-CM diagnosis code for temporary auditory threshold shift, bilateral. It belongs to category H93 (other disorders of ear, not elsewhere classified), block H90-H94 (other disorders of ear) and chapter 8 (diseases of the ear and mastoid process). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within H93.24 (temporary auditory threshold shift), H93.243 is specifically for temporary auditory threshold shift, bilateral. Related codes cover right ear (H93.241), left ear (H93.242) and unspecified ear (H93.249).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 154 (Other Ear, Nose, Mouth and Throat Diagnoses with MCC, relative weight 1.5921), DRG 155 (Other Ear, Nose, Mouth and Throat Diagnoses with CC, relative weight 0.9322) and DRG 156 (Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC, relative weight 0.6659), in MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 388.40 (abnormal auditory perception, unspecified).

Notes that apply from higher levels

Instructions written at a parent level also apply to H93.243.

› From H93.2 Other abnormal auditory perceptions
Excludes2
  • auditory hallucinations (R44.0)

Broader instructions also apply from Chapter 8: Diseases of the ear and mastoid process.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 388.40Abnormal auditory perception, unspecifiedapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about H93.243

Is H93.243 billable?

Yes. H93.243 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can H93.243 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict H93.243 as a principal diagnosis.

Is H93.243 a CC or MCC?

No. H93.243 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does H93.243 group to?

H93.243 is used in the MS-DRG v44.0 logic for MS-DRG 154 (Other Ear, Nose, Mouth and Throat Diagnoses with MCC), MS-DRG 155 (Other Ear, Nose, Mouth and Throat Diagnoses with CC) and MS-DRG 156 (Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for H93.243?

The CMS General Equivalence Mappings map H93.243 to ICD-9-CM 388.40.