F06.4 ICD-10-CM

ICD-10-CM code F06.4 describes anxiety disorder due to known physiological condition. Anxiety symptoms caused by a medical condition; pair with the underlying condition code. It is a billable, specific code valid for claim submission. It is grouped under the “Neurocognitive & Organic Disorders” section of the mental, behavioral, and neurodevelopmental disorders chapter.

When to use F06.4

Assign a code in this group when a mental or behavioral disturbance is caused by a known physiological condition, such as delirium, dementia, or another organic mental disorder. Base the selection on the documented medical workup and the specific cognitive or behavioral presentation. For F06.4 specifically, anxiety symptoms caused by a medical condition; pair with the underlying condition code.

Documentation & billing

Document the underlying etiology, the cognitive or behavioral findings, and whether a behavioral disturbance is present. Pair with an etiology code (for example Alzheimer disease G30.9 or a cerebrovascular code) when the cause is identified.

Common pitfalls

• Coding dementia without documenting whether a behavioral disturbance is present.
• Omitting the underlying etiology code when the cause is known.
• Confusing acute delirium (F05) with chronic dementia.

Common search terms for F06.4

Clinicians often look up F06.4 using plain-language terms. This code maps to:

Frequently asked questions