Bipolar II Disorder is rated by the U.S. Department of Veterans Affairs under DC 9432 of 38 CFR § 4.130, DC 9432 across 6 severity tiers (0% / 10% / 30% / 50% / 70%…). Service connection requires (1) a current diagnosis, (2) an in-service event, injury, or exposure, and (3) a medical nexus opinion linking the two under 38 C.F.R. § 3.303.
Bipolar II Disorder is a mood disorder defined by at least one major depressive episode plus at least one hypomanic episode, but never a full manic episode (the presence of a manic episode would reclassify it as Bipolar I). Hypomania involves a distinct period of elevated, expansive, or irritable mood with increased energy lasting at least four consecutive days, accompanied by symptoms such as decreased need for sleep, racing thoughts, distractibility, and risk-taking that are noticeable to others but not severe enough to cause marked functional impairment or psychosis. The depressive episodes are typically the more disabling and persistent feature, and many people spend far more cumulative time depressed than hypomanic.
Rating criteria text quoted verbatim from 38 C.F.R. § 4.130 (Mental disorders). Source verified 2026-05-15 by ClaimRecon Editorial Team against the Cornell Law CFR mirror; eCFR.gov is the authoritative government source.