ICD-10 Code F06 – Other mental disorders due to known physiological condition (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F06 – Other mental disorders due to known physiological condition
What it is
F06 covers mental disorders that arise from a known medical or physiological cause. Use it when the psychiatric presentation is linked to an underlying condition rather than a primary mental disorder.
Clinical signs
Clinical features vary; refer to documentation. Commonly, records describe cognitive, mood, perceptual, or behavioral changes that are attributed to an identified physical condition.
When to use this code
Use F06 when the clinician documents a mental disorder caused by or associated with a known physiological condition. It is appropriate when the underlying condition is identified and the mental disturbance is part of the clinical picture. If the note is nonspecific, check documentation for the exact diagnosis.
Do not use for
Do not use this code for primary psychiatric disorders without a physiological cause. It is also not the right choice when the record supports a more specific F06 subcategory or another diagnosis entirely.
Coding tip
Review the provider’s wording carefully and code the documented cause and mental disorder as specifically as possible.