Other congenital malformations of middle ear

This code signifies a birth defect affecting the middle ear structure, excluding conditions like ossicular chain anomalies or absence of the oval window, which have more specific codes. It encompasses a range of congenital abnormalities that impair the normal function of sound transmission within the middle ear.

Apply this code when documentation specifies a congenital malformation of the middle ear that isn't otherwise classified, such as an abnormally shaped tympanic cavity or an atypical course of the facial nerve within the middle ear. Supporting documentation should clearly state the congenital nature and the specific middle ear structure affected, ruling out acquired conditions.

• Ensure the documentation explicitly states "congenital" to differentiate from acquired middle ear pathologies.
• Review for more specific codes within the Q16 series (e.g., Q16.0-Q16.3) before defaulting to this "other" code.
• Do not use for conductive hearing loss without a documented underlying congenital middle ear malformation.