Its outer margins are smooth and rounded. It is located inside the posterior cranial fossa of the skull, near the center of the posterior surface of the petrous part of the temporal bone. The opening to the meatus is called the porus acusticus internus or internal acoustic opening. Reimbursement claims with a date of service on or. This is the American ICD-10-CM version of G46.8 - other international versions of ICD-10 G46.8 may differ. The 2022 edition of ICD-10-CM G46.8 became effective on October 1, 2021. The internal auditory meatus (also meatus acusticus internus, internal acoustic meatus, internal auditory canal, or internal acoustic canal) is a canal within the petrous part of the temporal bone of the skull between the posterior cranial fossa and the inner ear. G46.8 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Upper surface.Horizontal section through left ear upper half of section.The cochlea and vestibule, viewed from above.Tympanic cavity. The internal auditory meatus (also meatus acusticus internus, internal acoustic meatus, internal auditory canal, or internal acoustic canal) is a canal within the petrous part of the temporal bone of the skull between the posterior cranial fossa and the inner ear.Internal acoustic meatusTemporal bone at birth.
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