F31.3
Non-billableBipolar disorder, current episode depressed, mild or moderate severity
F31.3 is the ICD-10-CM code for Bipolar disorder, current episode depressed, mild or moderate severity. It is a non-billable category code — use a more specific child code such as F31.30 for billing.
F01-F99 Mental, Behavioral and Neurodevelopmental disorders
The patient is currently depressed, as in a depressive episode of either mild or moderate severity (F32.0 or F32.1), and has had at least one authenticated hypomanic, manic, or mixed affective episode in the past.
What this means — in plain language
MedlinePlus · NIHWhat is bipolar disorder? Bipolar disorder is a mood disorder that can cause intense mood swings: Sometimes you may feel extremely "up," elated, irritable, or energized. This is called a manic episode . Other times you may feel "down," sad, indifferent, or hopeless. This is called a depressive episode . You may have both manic and depressive symptoms together. This is called a mixed episode . Along with mood swings,…
Read more about Bipolar Disorder at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
Look up another ICD-10 code or condition