ICD-10 Code F06.4 – Anxiety disorder due to known physiological condition (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F06.4 – Anxiety disorder due to known physiological condition
What it is
F06.4 identifies anxiety symptoms that are caused by a documented medical or physiological condition. Use it when the anxiety is secondary to another condition, not a primary anxiety disorder.
Clinical signs
Clinical features vary; refer to documentation. Typical findings include excessive worry, tension, restlessness, or autonomic symptoms, with a clear link to an underlying physiological cause.
When to use this code
Use this code when the provider documents anxiety due to a known medical condition, such as a neurologic, endocrine, or other physiological disorder. Code the underlying condition first when applicable. You should also confirm that the record distinguishes this from a primary anxiety diagnosis.
Do not use for
Do not use F06.4 for generalized anxiety disorder, panic disorder, or anxiety that is not linked to a documented physiological cause. Check documentation if the cause is unclear.
Coding tip
Verify that the provider explicitly connects the anxiety to the medical condition before assigning F06.4.