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Q16.4 ICD-10-CA code: Other congenital malformations of middle ear

Q16.4 is the ICD-10-CA code for “Other congenital malformations of middle ear” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

Q16.4

Other congenital malformations of middle ear

Short description: Oth congenital malformations middle ear

ICD-10-CA · Canada · Also written Q164

Index terms

Entries in CIHI’s alphabetical index that lead to Q16.4. Searching the index by the condition the note names is how coders reach this code.

  • Maldevelopment, middle ear
  • Atresia, atretic, eustachian tube
  • Deformity, ear (acquired), middle
  • Deformity, middle ear (congenital)
  • Stricture, eustachian tube, congenital
  • Dilatation, eustachian tube, congenital
  • Distortion (congenital), eustachian tube
  • Hypoplasia, hypoplastic, eustachian tube
  • Malposition, congenital, eustachian tube
  • Deformity, eustachian tube (congenital) NEC
  • Hypoplasia, hypoplastic, ear (auricle) (lobe), middle
  • Abnormal, abnormality, abnormalities, course, eustachian tube
  • Anomaly, anomalous (congenital) (unspecified type), middle ear
  • Anomaly, anomalous (congenital) (unspecified type), eustachian tube
  • Imperfect, closure (congenital), ear drum (causing impairment of hearing)
  • Imperfect, closure (congenital), tympanic membrane (causing impairment of hearing)
  • Anomaly, anomalous (congenital) (unspecified type), ear, middle (causing impairment of hearing)

Notes for Q16.4

As CIHI prints them, with any note Q16.4 takes from the headings above it.

Includes

  • Congenital malformation of middle ear NOS

Excludes

Conditions classified elsewhere.

Where Q16.4 sits

  1. 1ChapterChapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  2. 2Block Q10-Q18Congenital malformations of eye, ear, face and neck
  3. 3Category Q16Congenital malformations of ear causing impairment of hearing
  4. 4Valid code Q16.4Other congenital malformations of middle ear

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See Q16.4 in the CIHI source

Frequently asked questions

What does ICD-10-CA code Q16.4 mean?

Q16.4 is the ICD-10-CA code for “Other congenital malformations of middle ear” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is Q16.4 in ICD-10-CA?

Q16.4 sits under Q16 Congenital malformations of ear causing impairment of hearing, within Q10-Q18 Congenital malformations of eye, ear, face and neck, within Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99).

What coding notes apply to Q16.4?

ICD-10-CA lists Includes, Excludes notes for Q16.4, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside Q16.4

Q16.0Congenital absence of (ear) auricleQ16.1Congenital absence, atresia and stricture of auditory canal (external)Q16.2Absence of eustachian tubeQ16.3Congenital malformation of ear ossiclesQ16.5Congenital malformation of inner earQ16.9Congenital malformation of ear causing impairment of hearing, unspecified