Q16.4

Billable
ChapterQ00–Q99
Ranksubcategory
Official Description

Other congenital malformations of middle ear

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99).

Instructional Notes

Includes
  • Congenital malformation of middle ear NOS
General instructions are available for the parent sections:
View CH17 NotesView Q10-Q18 NotesView Q16 Notes

Clinical Hierarchy

CH17Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
Q10-Q18Congenital malformations of eye, ear, face and neck (Q10-Q18)
Q16Congenital malformations of ear causing impairment of hearing
Q16.4Other congenital malformations of middle ear

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to Q16.4:

categoryQ16
Congenital malformations of ear causing impairment of hearing
View context instructions
blockQ10-Q18
Congenital malformations of eye, ear, face and neck (Q10-Q18)
View context instructions
chapterCH17
Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to Q16.4. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

14 raw paths
Absence (of) (organ or part) (complete or partial)2 unique routes
ear, congenital
middle, except ossicles→Q16.4
osseous meatus (ear)→Q16.4
Anomaly, anomalous (congenital) (unspecified type)2 unique routes
ear (external)
middle (causing impairment of hearing)→Q16.4
middle ear→Q16.4
Deformity2 unique routes
ear (acquired)
congenital (external)
middle→Q16.4
middle ear (congenital)→Q16.4
Distortion (s) (congenital)1 unique routes
ear (auricle) (external)
middle→Q16.4
Hypoplasia, hypoplastic1 unique routes
ear (auricle) (lobe)
middle→Q16.4
Imperfect2 unique routes
closure (congenital)(2 variants)
ear drum (causing impairment of hearing)→Q16.4
tympanic membrane (causing impairment of hearing)→Q16.4
Maldevelopment2 unique routes
middle ear→Q16.4(2 variants)
except ossicles→Q16.4
Malformation (congenital)2 unique routes
ear
middle→Q16.4
middle ear→Q16.4

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 154
Other Ear, Nose, Mouth and Throat Diagnoses with MCC
DRG 155
Other Ear, Nose, Mouth and Throat Diagnoses with CC
DRG 156
Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC

Cross Reference

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