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ICD-10-CM 2027 diagnosis code

H91.9Unspecified hearing loss

Not billable — use a more specific code

H91.9 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Looking up by condition? See ICD-10 code for Deafness.

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 H91.9

H91.9 is the ICD-10-CM diagnosis code for unspecified hearing loss. It belongs to category H91 (other and unspecified hearing loss), block H90-H94 (other disorders of ear) and chapter 8 (diseases of the ear and mastoid process). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within H91, choose H91.9 (Unspecified hearing loss) only when documentation doesn't support a more specific option: Ototoxic hearing loss (H91.0), Presbycusis (H91.1), sudden idiopathic hearing loss (H91.2), Deaf nonspeaking, not elsewhere classified (H91.3) and other specified hearing loss (H91.8).

To report this condition, pick the subcode that matches the documentation: H91.90 (unspecified ear), H91.91 (right ear), H91.92 (left ear) and H91.93 (bilateral).

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

Specific codes under H91.9

Coding notes

Applicable toConditions and synonyms classified to this code
  • Deafness NOS
  • High frequency deafness
  • Low frequency deafness

Notes that apply from higher levels

Instructions written at a parent level also apply to H91.9.

› From H91 Other and unspecified hearing loss
Excludes1
  • abnormal auditory perception (H93.2-)
  • hearing loss as classified in H90.-
  • impacted cerumen (H61.2-)
  • noise-induced hearing loss (H83.3-)
  • psychogenic deafness (F44.6)
  • transient ischemic deafness (H93.01-)

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

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to H91.9.

Codes whose notes reference H91.9

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 H91.9

Is H91.9 billable?

No. H91.9 is a header code. Report one of its more specific subcodes instead.