VA toxic exposure claims

VA Toxic Exposure Claims, by Exposure

Name: VA Toxic Exposure Claims, by Exposure
Creator: Patriot Path Medical Team

If you were exposed to something toxic in service, you can claim the conditions it caused. The hard part is proving it. For some exposures the VA already accepts the link, so you do not need a nexus letter. For many others, you do. Knowing which side you are on is the whole game.

Patriot Path handles the medical piece. Our physicians write the nexus letters and independent medical opinions that connect a condition to your service when the VA does not accept the link on its own. One flat fee of $1,500, and the first consultation is free.

Medically reviewed by the Patriot Path Medical Team

Licensed MD and PhD reviewers • Last updated: June 2026

Meet our clinicians → • Our review process →

✓ Medically Reviewed

Book a free consultation Call (833) 234-0200

Start with your exposure

Pick the exposure that fits your service. Each guide will explain the conditions tied to it, who qualifies, and whether you need a nexus letter. More guides are going live as we build them out.

The one thing to know first

Every toxic exposure claim runs down one of two tracks. On the presumptive track, the VA already accepts that your service caused the illness, so you do not need a nexus letter. On the nexus track, you have to prove the link with a medical opinion. Figure out which one is yours first.

Presumptive or nexus? Find your track

Two questions, plain answers. This points you to the right path. It is orientation, not a claim decision or legal advice.

1. What were you exposed to?

What “presumptive” means

A presumptive condition is one the VA has already tied to an exposure by rule. The big presumptive programs are the PACT Act (burn pits and airborne hazards), Agent Orange and other herbicides, the contaminated water at Camp Lejeune, Gulf War illness, and radiation.

Presumptive does three things for you. You skip the hardest part, proving the link. You do not pay for a nexus letter you do not need. And the claim moves faster. The catch is that presumptive is not automatic. You still need a current diagnosis, and your service record still has to show the right location and dates. Claims get denied when the diagnosis is missing or the dates do not match, so the paperwork still matters.

The VA keeps adding conditions to these lists. If your condition was denied years ago and it is presumptive now, you can file again.

When you still need a nexus letter

Most denied claims are not denied because the veteran was not sick. They are denied because the link to service was not proven on paper.

Under 38 CFR 3.303, a service-connected claim needs three things to line up:

1.A current diagnosis. A doctor has diagnosed the condition now.
2.An in-service event or exposure. Something in your service that could have caused or worsened it.
3.A medical nexus. A qualified opinion that ties the two together.

That opinion has to clear a specific standard: “at least as likely as not,” meaning a 50% or better chance the condition is tied to service. That standard comes from the benefit-of-the-doubt rule in 38 U.S.C. 5107(b), carried out in 38 CFR 3.102. When the evidence is about evenly balanced, the tie goes to the veteran.

The law even builds in a path for exposure claims. Under the PACT Act, when a condition is not presumptive but is tied to a qualifying toxic exposure, the VA has to order an exam and a medical opinion. That opinion is the nexus. Our physicians review your records, cite the medical literature, and write it to meet the standard.

See how our nexus letter process works →

Proving the exposure when there is no record

Here is the problem with occupational exposures like jet fuel, solvents, or firefighting foam. The military rarely wrote down who breathed what. So the second piece of the claim, the in-service exposure, has no paper trail.

You can still prove it, and your own account counts. The VA treats a veteran’s firsthand statement as competent evidence of what they saw, did, and were exposed to, under 38 CFR 3.159. A statement from someone who served with you, a buddy statement, helps too.

You can make that statement carry real weight by signing it as an unsworn declaration under penalty of perjury, under 28 U.S.C. 1746. That gives a plain written statement the same force as a sworn affidavit, with no notary. The trick is to be specific: your job, your base, the dates, and exactly what you handled or breathed. We help you put that together so it lines up with the medical opinion.

Secondary conditions from an exposure

One service-connected condition can cause another, and the second one can be rated too. A cancer from an exposure can lead to depression. A presumptive lung condition can drive sleep apnea. These secondary claims are often missed, and they are a big part of what we do. Each exposure guide will point out the secondary links that matter most.

Frequently asked questions

Do I need a nexus letter if my condition is presumptive?

No. If you qualify for a presumptive condition, the VA accepts the link and you do not need a nexus letter. You still need a current diagnosis and a service record that shows the right place and dates.

What if my condition is not on the presumptive list?

You can still win the claim through direct service connection. That takes a medical nexus opinion tying your condition to the exposure. For a non-presumptive exposure claim, the PACT Act requires the VA to order an exam and opinion.

My claim was denied but my condition is presumptive now. What do I do?

File again. When a condition is added to a presumptive list, you can file a supplemental claim with the new basis. A past denial is not the end.

I have no records showing my exposure. Can I still file?

Yes. Your own firsthand statement is competent evidence of the exposure, and you can sign it under penalty of perjury under 28 U.S.C. 1746. A statement from someone who served with you helps. A medical opinion then ties the exposure to your condition.

Which exposures need a nexus letter?

As a rule, the occupational ones with no presumption: jet fuel, firefighting foam and PFAS, industrial solvents, and asbestos. Presumptive programs like burn pits and Agent Orange usually do not, unless your claim falls outside the listed conditions, dates, or locations.

Does Patriot Path cover my exposure?

Yes. We write nexus letters and medical opinions for any exposure and any condition in the VA rating schedule. If you are not sure yours qualifies, book a free consultation and we will tell you straight.

Not sure if you are presumptive or need a nexus letter?

Let’s figure it out together. The first consultation is free, and we will tell you straight whether a nexus letter can help your claim.