• Skip to main content
  • Skip to primary sidebar
  • Skip to footer
  • Medical Codes
    • HCPCS 2025
    • ICD10 CM Codes
    • ICD 10 PCS
  • Index
    • ICD 10 CM Indexes
    • ICD 10 CM External Cause Indexes
    • ICD 10 CM Drugs Indexes
    • ICD 10 CM Neoplasms Indexes
    • HCPCS Indexes
  • DRG
  • Medicare Articles
  • Coding News
Free Medical Coding

Free Medical Coding

ICD10CM, HCPCS, PCS, DRG codes lookup for free! Coding news and articles and more!

Free Medical Coding > ICD10 CM > 2025 ICD-10-CM Codes > 2025 ICD-10-CM Codes Q00-Q99 – Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99) > 2025 ICD-10-CM Codes Q10-Q18 – Congenital malformations of eye, ear, face and neck (Q10-Q18) > 2025 ICD-10-CM Codes Q16 – Congenital malformations of ear causing impairment of hearing (Q16) > 2025 ICD-10-CM Diagnosis Code Q16.5 – Congenital malformation of inner ear (Q16.5)

2025 ICD-10-CM Diagnosis Code Q16.5 – Congenital malformation of inner ear (Q16.5)

2016201720182019202020212022202320242025Billable/Specific Code
  • Q16.5 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2024 edition of ICD-10-CM Q16.5 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of Q16.5 – other international versions of ICD-10 Q16.5 may differ.

ICD-10-CM Q16.5 is grouped within Diagnostic Related Group(s):

  • 154 Other ear, nose, mouth and throat diagnoses with mcc
  • 155 Other ear, nose, mouth and throat diagnoses with cc
  • 156 Other ear, nose, mouth and throat diagnoses without cc/mcc

Applicable To

  • Congenital anomaly of membranous labyrinth
  • Congenital anomaly of organ of Corti

Code History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2016 (effective 10/1/2015): No change
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change

Diagnosis Index entries containing back-references to Q16.5:

  • inner > ear, congenital Q16.9
  • inner ear, congenital > Absence (of) (organ or part) (complete or partial)
  • labyrinth, membranous > Absence (of) (organ or part) (complete or partial)
  • organ > Absence (of) (organ or part) (complete or partial)
  • of Corti, congenital > organ Q16.5
  • labyrinth, membranous > Agenesis
  • organ > Agenesis
  • of Corti > organ Q16.5
  • inner > ear (external) Q17.9
  • labyrinth, membranous > Anomaly, anomalous (congenital) (unspecified type) Q89.9
  • of Corti > organ Q89.9
  • labyrinth, membranous > Aplasia
  • labyrinth, membranous (congenital) > Collapse R55
  • internal > congenital (external) Q17.9
  • organ of Corti (congenital) > Deformity Q89.9
  • membranous labyrinth, congenital (causing impairment of hearing) > Degeneration, degenerative
  • saccule, congenital (causing impairment of hearing) > Degeneration, degenerative
  • saccule, congenital > Dilatation
  • inner > ear (auricle) (external) Q17.3
  • organ > Distortion (s) (congenital)
  • of Corti > organ Q16.5
  • vestibular aqueduct > Enlargement, enlarged
  • cochlea > Malformation (congenital)
  • inner > ear Q17.9
  • internal ear > Malformation (congenital)
  • Mondini\’s (congenital) (malformation, cochlea) > Malformation (congenital)

Primary Sidebar

Footer

About us

At Freemedicalcoding.com, our mission is to provide you with free access to the latest medical codes from authentic Government and industry databases.

We provide free access to ICD9, ICD10, HCPCS, PCS, DRG and other medical codes databases. Our site is updated regularly.

We are also committed to providing you with the latest news about the coding industry, as well as access to jobs, education and certification and memberships in various associations. We share information from Medicare, CMS and other leading medical codes news sources.

Disclaimer: All data and news are the property of their respective companies. We are not affiliated with any of the sources we provide information from.  The information is provided on a best-effort basis. We assume no liability for any information shared. Please make sure you validate the information you get from us.

Newsletter

Stay up-to-date with the latest in medical coding and medical coding software

Contact Us

Provistas,
Incorporated 10339 E 37th Street,
Yuma, AZ 85365

support@freemedicalcoding.com

Copyright © 2026 Free Medical Codes