ICD-11 classes
10 Diseases of the ear or mastoid process
Diseases of middle ear or mastoid

ICD-11 Diseases of middle ear or mastoid

Middle ear, derived from the first pharyngeal (branchial) pouch; has the malleus and incus and stapes and includes the spaces of the epitympanum and mesotympanum and hypotympanum. The mastoid; normally contains «air"; the lateral boundary of the mesotympanum is where the tympanic membrane is, or normally would be located.

The diagnosis includes nothing.

The diagnosis excludes nothing.

Diagnosis contains 18 clarifying diagnoses:

1. Otitis media
   It contains 6 clarifying diagnoses.
2. AB10 — Disorders of Eustachian tube
   It contains 6 clarifying diagnoses.
3. AB11 — Mastoiditis or related conditions
   It contains 5 clarifying diagnoses.
4. AB12 — Cholesteatoma of middle ear
5. AB13 — Perforation of tympanic membrane
   It contains 5 clarifying diagnoses.
6. AB14 — Acute myringitis
7. AB15 — Chronic myringitis
8. AB16 — Tympanosclerosis
9. AB17 — Adhesive middle ear disease
10. AB18 — Discontinuity or dislocation of ear ossicles
11. AB19 — Acquired abnormalities of ear ossicles not related to discontinuity or dislocation
12. AB1A — Polyp of middle ear
    It contains 3 clarifying diagnoses.
13. AB1B — Middle ear cicatrix
14. AB50.0 — Congenital conductive hearing loss
15. AB33 — Otosclerosis
16. AB50.2 — Congenital mixed conductive and sensorineural hearing loss
17. AB1Y — Other specified diseases of middle ear or mastoid
18. AB1Z — Diseases of middle ear or mastoid, unspecified