Presumptive conditions: when you do not need a nexus

For certain conditions and certain service, the VA stops asking you to prove the connection and simply presumes it. It is the single biggest shortcut in the entire system, and thousands of eligible veterans have never filed.

Last reviewed August 2026 · Not legal advice, VA.gov always controls

Ordinarily a claim needs three things: a current diagnosis, an in-service event, and a medical opinion linking them. That third piece, the nexus, is where most claims die.

A presumptive condition removes it. If you have a qualifying diagnosis and you served in a qualifying place, time, or capacity, the VA presumes the condition is related to your service. You do not need a doctor to write an opinion. You do not need the condition documented in your Service Treatment Records. You do not even need to have noticed it while you were in.

What a presumption does and does not do

It replaces the nexus. It replaces nothing else. You still need:

• A current diagnosis of the listed condition, from a clinician. A presumption for asthma does you no good if nobody has diagnosed you with asthma.
• Qualifying service, the right place, the right dates, the right duty, depending on which presumption applies.
• To actually file a claim. This is the part that catches people. The VA does not scan its records, find eligible veterans, and mail them money. A presumption is a rule that applies to a claim you submit. No claim, no benefit.

And severity still has to be documented, because the presumption gets you service connected. It does not set your percentage. That is still decided on the rating criteria and on your evidence of how bad the condition is.

The major presumptive categories

Toxic exposure and the PACT Act

The Sergeant First Class Heath Robinson Honoring our Promise to Address Comprehensive Toxics (PACT) Act, signed in 2022, was the largest expansion of presumptive coverage in decades. It broadly covers veterans exposed to burn pits and other airborne hazards during Gulf War-era and post-9/11 deployments, and it added conditions to the Agent Orange list as well.

The burn pit and airborne hazard presumptives include a long list of respiratory conditions and cancers, asthma diagnosed after service, chronic rhinitis and sinusitis, chronic bronchitis, COPD, emphysema, constrictive bronchiolitis, interstitial lung disease, pulmonary fibrosis, sarcoidosis, and a range of respiratory, head, neck, and gastrointestinal cancers, among others.

If you deployed to the Middle East, Southwest Asia, Afghanistan, or several other listed locations during the covered periods, this is worth ten minutes of your time even if you feel fine, and worth a claim immediately if you have any of the listed conditions.

Agent Orange and herbicide exposure

Long-standing presumptions cover veterans exposed to herbicides, historically associated with Vietnam-era service but also extending to Thailand base perimeters, Korea's demilitarized zone, Laos, Cambodia, Guam, American Samoa, Johnston Atoll, and certain herbicide storage and testing sites. The PACT Act both expanded the qualifying locations and added conditions to the list.

The associated conditions include several cancers, ischemic heart disease, Parkinson's disease and parkinsonism, type 2 diabetes, peripheral neuropathy, and, added by the PACT Act, hypertension and monoclonal gammopathy of undetermined significance.

Camp Lejeune

Veterans, reservists, and guardsmen who served at Camp Lejeune or MCAS New River for at least 30 cumulative days between August 1953 and December 1987 have presumptive coverage for a set of conditions associated with the contaminated water supply, including several cancers, Parkinson's disease, and aplastic anemia. Family members who lived there may be eligible for healthcare cost reimbursement. A separate legal claims process exists under the Camp Lejeune Justice Act, which is distinct from a VA disability claim. Do not confuse the two, and do not let a law firm advertisement convince you that filing one replaces filing the other.

Gulf War illness

Veterans of the Persian Gulf theater have presumptive coverage for medically unexplained chronic multisymptom illnesses, chronic fatigue syndrome, fibromyalgia, and functional gastrointestinal disorders such as irritable bowel syndrome, as well as certain undiagnosed illnesses with symptoms like joint pain, headaches, and neurological complaints. This category is unusual and valuable precisely because it does not require a named diagnosis in the way most claims do.

Radiation exposure

Atomic veterans, those present at nuclear tests, at Hiroshima or Nagasaki during the occupation, or at certain gaseous diffusion plants, have presumptive coverage for a list of radiogenic cancers.

Prisoners of war and chronic conditions shown in service

Former prisoners of war have their own presumptive list keyed to length of captivity. Separately, certain chronic diseases appearing to a compensable degree within a year of separation, arthritis, hypertension, diabetes, psychoses, and others, are presumed service connected under the one-year rule.

Why eligible veterans still do not file

Three reasons, all of them fixable:

1. "I was already denied for that." A denial under the old rules does not bind the VA under new ones. If a condition became presumptive after your denial, file a supplemental claim. In some cases the VA readjudicates automatically, but do not rely on that, and do not wait for a letter that may never come.
2. "I do not think I was exposed." Exposure presumptions are based on where and when you served, not on whether you remember smelling anything. If your dates and locations qualify, you qualify.
3. "Someone else needs it more." This is not a fixed pot. Your claim does not reduce anyone else's, and compensation for a condition your service caused is not charity.

How to file a presumptive claim

1. Get the diagnosis. If you suspect a listed condition and have never been evaluated, that is the first appointment to make.
2. Confirm your qualifying service. Deployment orders, travel vouchers, award citations, and your DD-214 all establish where and when. Pull them now.
3. File an Intent to File to protect your effective date while you assemble the rest.
4. Submit VA Form 21-526EZ and state plainly which presumption you are claiming under: "claimed as presumptive under the PACT Act for burn pit exposure," for example. Do not make the rater infer it.
5. Document severity. The presumption handles the connection; your treatment records, symptom logs, and lay statements handle the percentage.
6. Look for secondaries. A presumptive condition, once service connected, becomes a primary that other conditions can attach to. See the secondary conditions guide.