Q16.4 Other congenital malformations of middle ear

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applicable to

• Congenital malformation of middle ear NOS

Applies from Q16 Congenital malformations of ear causing impairment of hearing

Excludes1 (never code together)

• congenital deafness (H90.-)

MS-DRG index

Defines the logic of DRG(s) 154-156 in MDC 03.

Approximate ICD-9-CM (GEMs)

• 744.03 Anomaly of middle ear, except ossicles

Code annotations containing back-references to Q16.4

Back-references to Q16.4

• Type 1 Excludes: Q17 Other congenital malformations of ear ("congenital malformations of ear with impairment of hearing (Q16.0-Q16.9)")

Diagnosis Index entries for Q16.4

• Absence (of) (organ or part) (complete or partial) › ear, congenital › middle, except ossicles
• Absence (of) (organ or part) (complete or partial) › osseous meatus (ear)
• Anomaly, anomalous (congenital) (unspecified type) › ear (external) › middle (causing impairment of hearing)
• Anomaly, anomalous (congenital) (unspecified type) › middle ear
• Deformity › ear (acquired) › congenital (external) › middle
• Deformity › middle ear (congenital)
• Distortion (s) (congenital) › ear (auricle) (external) › middle
• Hypoplasia, hypoplastic › ear (auricle) (lobe) › middle
• Imperfect › closure (congenital) › ear drum (causing impairment of hearing)
• Imperfect › closure (congenital) › tympanic membrane (causing impairment of hearing)
• Maldevelopment › middle ear
• Maldevelopment › middle ear › except ossicles
• Malformation (congenital) › ear › middle
• Malformation (congenital) › middle ear

Nearby codes

• Q16 Congenital malformations of ear causing impairment of hearing
• Q16.0 Congenital absence of (ear) auricle
• Q16.1 Congenital absence, atresia and stricture of auditory canal (external)
• Q16.2 Absence of eustachian tube
• Q16.3 Congenital malformation of ear ossicles
• Q16.4 Other congenital malformations of middle ear (this code)
• Q16.5 Congenital malformation of inner ear
• Q16.9 Congenital malformation of ear causing impairment of hearing, unspecified