H91.21

Billable
ChapterH60–H95
Ranksubcategory
Official Description

Sudden idiopathic hearing loss, right ear

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 8: Diseases of the Ear and Mastoid Process (H60-H95).
General instructions are available for the parent sections:
View CH8 NotesView H91 NotesView H91.2 Notes

Clinical Hierarchy

CH8Diseases of the ear and mastoid process (H60-H95)
H90-H94Other disorders of ear (H90-H94)
H91Other and unspecified hearing loss
H91.2Sudden idiopathic hearing loss
H91.21Sudden idiopathic hearing loss, right ear

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to H91.21:

subcategoryH91.2
Sudden idiopathic hearing loss
View context instructions
categoryH91
Other and unspecified hearing loss
View context instructions
chapterCH8
Diseases of the ear and mastoid process (H60-H95)
View context instructions

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 154
Other Ear, Nose, Mouth and Throat Diagnoses with MCC
DRG 155
Other Ear, Nose, Mouth and Throat Diagnoses with CC
DRG 156
Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC

Cross Reference

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