DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

H91 Other and unspecified hearing loss

  • Header · not billable

H91 is not billable. The category heads 21 billable codes in FY2027, grouped under 6 subdivisions.

Index → code

  • Deaf nonspeaking NEC → H91.3
  • Presbycusis, presbyacusia → H91.1-
  • Deafmutism (acquired) (congenital) NEC → H91.3

Where it sits

  1. Chapter 8 Diseases of the ear and mastoid process (H60-H95)
  2. H90-H94 Other disorders of ear (H90-H94)
  3. H91 Other and unspecified hearing loss
Billable codes
21
Subdivisions
6
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
11

Codes in H91

  1. H91.0
    Ototoxic hearing loss
    Header
    Code first 1, Use additional code 1

    Code first

    • poisoning due to drug or toxin, if applicable (T36-T65 with fifth or sixth character 1-4) T36 T65

    Use additional code

    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) T36 T50
  2. H91.01
    Ototoxic hearing loss, right ear
    Billable
  3. H91.02
    Ototoxic hearing loss, left ear
    Billable
  4. H91.03
    Ototoxic hearing loss, bilateral
    Billable
  5. H91.09
    Ototoxic hearing loss, unspecified ear
    Billable
  6. H91.1
    Presbycusis
    Header
    Inclusion terms 1

    Inclusion terms

    • Presbyacusia
  7. H91.10
    Presbycusis, unspecified ear
    Billable
  8. H91.11
    Presbycusis, right ear
    Billable
  9. H91.12
    Presbycusis, left ear
    Billable
  10. H91.13
    Presbycusis, bilateral
    Billable
  11. H91.2
    Sudden idiopathic hearing loss
    Header
    Inclusion terms 1

    Inclusion terms

    • Sudden hearing loss NOS
  12. H91.20
    Sudden idiopathic hearing loss, unspecified ear
    Billable
  13. H91.21
    Sudden idiopathic hearing loss, right ear
    Billable
  14. H91.22
    Sudden idiopathic hearing loss, left ear
    Billable
  15. H91.23
    Sudden idiopathic hearing loss, bilateral
    Billable
  16. H91.3
    Deaf nonspeaking, not elsewhere classified
    Billable
  17. H91.8
    Other specified hearing loss
    Header
  18. H91.8X
    Other specified hearing loss
    Header
  19. H91.8X1
    Other specified hearing loss, right ear
    Billable
  20. H91.8X2
    Other specified hearing loss, left ear
    Billable
  21. H91.8X3
    Other specified hearing loss, bilateral
    Billable
  22. H91.8X9
    Other specified hearing loss, unspecified ear
    Billable
  23. H91.9
    Unspecified hearing loss
    Header
    Inclusion terms 3

    Inclusion terms

    • Deafness NOS
    • High frequency deafness
    • Low frequency deafness
  24. H91.90
    Unspecified hearing loss, unspecified ear
    Billable
  25. H91.91
    Unspecified hearing loss, right ear
    Billable
  26. H91.92
    Unspecified hearing loss, left ear
    Billable
  27. H91.93
    Unspecified hearing loss, bilateral
    Billable

Sources of each column.

Instructions

At H91

Excludes1

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

Notes that also apply

Chapter 8 instructions (Notes 1, Excludes2 8): printed on the chapter 8 page.

Index entries

  • Presbycusis, presbyacusia → H91.1-
  • Deaf nonspeaking NEC → H91.3
  • Deafmutism (acquired) (congenital) NEC → H91.3
  • Deafness (acquired) (complete) (hereditary) (partial) → H91.9-
  • Deafness (acquired) (complete) (hereditary) (partial)ototoxic → H91.0
  • Deafness (acquired) (complete) (hereditary) (partial)sudden (idiopathic) → H91.2-
  • Deafness (acquired) (complete) (hereditary) (partial)nonspeaking → H91.3
  • Mutismdeaf (acquired) (congenital) NEC → H91.3
  • Deafness (acquired) (complete) (hereditary) (partial)specified type NEC → H91.8
  • Deafness (acquired) (complete) (hereditary) (partial)high frequency → H91.9-
  • Deafness (acquired) (complete) (hereditary) (partial)low frequency → H91.9-

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy