ICD-10 Code F34.8 – Other persistent mood [affective] disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F34.8 – Other persistent mood [affective] disorders
What it is
F34.8 identifies persistent mood disorders that do not fit the more specific ICD-10 categories. Use it when documentation describes a chronic affective disorder, but the record does not support a more precise code.
Clinical signs
Clinical features vary; refer to documentation. Persistent low mood, fluctuating affect, or long-term mood disturbance may be noted, but you should code only what the clinician has documented.
When to use this code
Use F34.8 when the provider documents another persistent mood disorder and no specific persistent mood diagnosis is named. It may also apply when the condition is chronic and affective in nature, but the chart lacks detail for a more specific code.
Check documentation if the note mentions depressive, bipolar, or episodic mood symptoms, because those may require a different code. Confirm that the diagnosis is persistent rather than an acute mood episode.
Do not use for
Do not use this code for major depressive disorder, bipolar disorder, or other clearly specified mood disorders. If the record supports a more exact diagnosis, code that condition instead.
Coding tip
Code F34.8 only when the clinician’s wording supports a persistent affective disorder and no more specific ICD-10 option is documented.