How presumptive service connection works

Direct service connection requires three elements: (1) a current diagnosis, (2) an in-service event or exposure, and (3) a medical "nexus" linking the two. The nexus is usually the hardest piece — getting a physician to write that the condition is "at least as likely as not" related to service.

Presumptive service connection removes that third element for specified combinations of service and condition. Congress and VA have decided that the medical link is established by population data, so you don't have to prove it case-by-case.

The classics: - Agent Orange — Vietnam, Korean DMZ, Thailand bases, Blue Water Navy in certain coastal areas → 14+ diseases including Type II diabetes, ischemic heart disease, several cancers. - PACT Act — Gulf War-era and post-9/11 vets with toxic-exposure service → 20+ conditions added to the presumptive list. - Camp Lejeune — service at Camp Lejeune between 1953-1987 → 8 conditions. - Gulf War undiagnosed illness — Southwest Asia theater after 1990 → chronic multi-symptom illnesses without a diagnosed cause.

You still need a current diagnosis, and you still need to show qualifying service (DD-214, deployment records, dates). What you skip is the nexus letter.

Our Presumptives Library lists every active rule we track.