Non-Billable / Non-Specific Code
ICD-10-CM G90 is the diagnosis code for Disorders of autonomic nervous system. 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 non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as G90. They are mutually exclusive:
Understanding where G90 sits in the ICD-10-CM classification helps ensure proper coding:
No, G90 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
G90 is the ICD-10-CM diagnosis code for "Disorders of autonomic nervous system". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
G90 is located in Section G89-G99 — "Other disorders of the nervous system" within Chapter 6 of the ICD-10-CM Tabular List.
G90 has 10 sub-code(s) that provide more specific detail: G90.0, G90.1, G90.2, G90.3, G90.4 and more.
Use G90 when the patients documented diagnosis matches "Disorders of autonomic nervous system" 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 Disorders of autonomic nervous system is G90.
No, G90 is non-billable. Use a more specific sub-code for primary diagnosis billing.
G90 is in Chapter 6 of the ICD-10-CM Tabular List.
Type 1 Excludes for G90 include: dysfunction of the autonomic nervous system due to alcohol (G31.2).
Yes, G90 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.