ICD-10-CM Q99.818 is the diagnosis code for Other Usher syndrome. This code falls under the section "Chromosomal abnormalities, not elsewhere classified" within Chapter 17 — Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where Q99.818 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, Q99.818 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Q99.818 is the ICD-10-CM diagnosis code for "Other Usher syndrome". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of Q99.818 is Q99.81 ("Usher syndrome"). Q99.818 provides a more specific classification within this category.
Q99.818 is located in Section Q90-Q99 — "Chromosomal abnormalities, not elsewhere classified" within Chapter 17 of the ICD-10-CM Tabular List.
Use Q99.818 when the patients documented diagnosis matches "Other Usher syndrome" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Other Usher syndrome is Q99.818.
Yes, Q99.818 can be used as a primary diagnosis code since it is billable and specific.
Q99.818 is in Chapter 17 of the ICD-10-CM Tabular List.
Yes, Q99.818 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.