Q16.4 Other congenital malformations of middle ear
The ICD-10-CM code for Other congenital malformations of middle ear is Q16.4 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- Q10-Q18: Congenital malformations of eye, ear, face and neck (Q10-Q18)
- Category Q16
- 8 codes (7 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to Q16.4:
- Absence (of) (organ or part) (complete or partial) › osseous meatus (ear)
- Malformation (congenital) › middle ear
- Maldevelopment › middle ear
- Deformity › middle ear (congenital)
- Anomaly, anomalous (congenital) (unspecified type) › middle ear
- Absence (of) (organ or part) (complete or partial) › ear, congenital › middle, except ossicles
- Anomaly, anomalous (congenital) (unspecified type) › ear (external) › middle (causing impairment of hearing)
- Distortion (s) (congenital) › ear (auricle) (external) › middle
Inclusion Terms
- Congenital malformation of middle ear NOS
U.S. Hospital Utilization
Q16.4 appeared in too few sampled U.S. inpatient stays in 2023 to report a national estimate (AHRQ suppresses counts of 10 or fewer) — a rare inpatient diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
POA indicator for congenital conditions/anomalies and Q00-Q99 exceptionCongenital conditions and anomalies Assign “Y” for congenital conditions and anomalies except for categories Q00- Q99, Congenital anomalies, which are on the exempt list. Congenital conditions are always considered present on admission.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026