Evidence Support
Evidence Support and Nexus Letters for VA Claims
Evidence problems are a common reason VA claims are denied. The useful question is what the decision says is missing and what evidence may address that issue.
For non-presumptive conditions, veterans must demonstrate a medical nexus between their service and current diagnosis. Cross & York helps veterans understand what evidence is needed, including military occupational specialty records, exposure histories, and independent medical expert opinions.
What "nexus" means
A nexus is the medical link between an in-service event or exposure and a current diagnosis. The standard is "at least as likely as not," meaning about a 50/50 probability, based on medical evidence.
Types of evidence that strengthen a claim
- Service treatment records documenting in-service conditions or exposures
- Military Occupational Specialty (MOS) evidence showing duty-related exposure
- Deployment records establishing presence in qualifying locations
- Independent Medical Opinions (IMOs) from outside specialists
- Lay statements from fellow service members ("buddy statements")
- Toxic Exposure Risk Activity (TERA) review for non-presumptive exposure claims
How we help
Cross & York can help veterans identify what's missing from their file, obtain records from the National Personnel Records Center, and coordinate with medical experts who provide IMOs and nexus letters.
Last reviewed by Cross & York Editorial Team. Content reviewed against VA.gov and Federal Register sources.