ICD-10-CM G90.2 is the diagnosis code for Horner's syndrome. This code falls under the section "Other disorders of the nervous system" within Chapter 6 — Diseases of the nervous system (G00-G99). 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 G90.2 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, G90.2 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
G90.2 is the ICD-10-CM diagnosis code for "Horner's syndrome". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of G90.2 is G90 ("Disorders of autonomic nervous system"). G90.2 provides a more specific classification within this category.
G90.2 is located in Section G89-G99 — "Other disorders of the nervous system" within Chapter 6 of the ICD-10-CM Tabular List.
Use G90.2 when the patients documented diagnosis matches "Horner's 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 Horner's syndrome is G90.2.
Yes, G90.2 can be used as a primary diagnosis code since it is billable and specific.
G90.2 is in Chapter 6 of the ICD-10-CM Tabular List.
Yes, G90.2 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.