ICD-10 Code F40.9 – Phobic anxiety disorder, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F40.9 – Phobic anxiety disorder, unspecified
What it is
F40.9 identifies a phobic anxiety disorder when the specific phobia is not documented or cannot be classified more precisely. Use it for anxiety tied to a feared object or situation without a named subtype.
Clinical signs
Typical features include marked fear, immediate anxiety on exposure or anticipation, and avoidance of the feared trigger. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents phobic anxiety disorder but does not specify the phobia type. It also fits when the record confirms a phobic anxiety condition and the exact trigger is unclear. Check documentation if another anxiety disorder is named.
Do not use for
Do not use F40.9 for generalized anxiety, panic disorder, or obsessive-compulsive disorder. If the phobia is documented more specifically, code the more precise diagnosis instead.
Coding tip
Code the documented phobia only when the chart supports it; otherwise, use F40.9 and query for specificity.