Attorney & Advocate Partnership Program

Garner v. Tran (2021) is the case that defines which "first-links" actually count when obesity stands between a service-connected condition and a new disability. The Court laid out a six-factor, non-exhaustive list of the evidence that can raise the theory—from mobility loss and medication side effects to clinician statements. Because the list is non-exhaustive, the door isn't shut: if your record draws a reasonable association between your weight gain and your service-connected condition, the VA has to consider it. Here's the six-factor test, the three-part Walsh causation standard, and what a defensible nexus letter must show.

PTSD can both cause and worsen migraines, and the VA can grant migraines as secondary to a service-connected PTSD rating. You'll need a current migraine diagnosis, your PTSD rating, and a medical opinion explaining the link — usually the HPA-axis stress pathway. Migraines are rated 0–50% under 38 CFR § 4.124a, DC 8100, based on how often you get prostrating attacks.

The VA frequently denies tinnitus even after conceding both the diagnosis and in-service noise exposure — denying only on the nexus, the medical link. The most common reason given is that the veteran's audiogram is normal, so the noise supposedly caused no injury. That reasoning is contradicted by the science of "hidden hearing loss" (cochlear synaptopathy): loud noise can permanently damage the inner ear's nerve connections while the standard hearing test stays normal. A focused independent medical opinion that explains this mechanism — and addresses what the exam missed — is built to close exactly that gap.