ICD-10 Code F06.30 – Mood disorder due to known physiological condition, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F06.30 – Mood disorder due to known physiological condition, unspecified
What it is
This code identifies a mood disturbance caused by an underlying medical condition, when the specific mood type is not documented. Use it when the record links the mood change to a known physiological cause but does not name depression, mania, or mixed features.
Clinical signs
Clinical features vary; refer to documentation. You may see persistent mood change, irritability, low mood, or elevated mood attributed to a medical disorder, substance effect, or other physiological condition.
When to use this code
Use F06.30 when the clinician documents a mood disorder due to a known medical condition and does not specify the subtype. It also fits when the chart clearly ties the mood problem to the physiologic condition, but details are incomplete. Check documentation if the cause or mood pattern is unclear.
Do not use for
Do not use this code for primary mood disorders such as major depressive disorder or bipolar disorder. Also avoid it when the record describes a mental disorder unrelated to a physiological cause.
Coding tip
Confirm both the underlying condition and the causal link in the provider note before assigning F06.30.