Toxic Exposure
Vietnam Veterans & Agent Orange
Herbicide presumptions under §3.307(a)(6) and §3.309(e)
Veterans with qualifying Vietnam-era service are presumed exposed to Agent Orange, and a long list of conditions is presumptively service-connected — no nexus required.
Presumed Exposure, Presumed Connection
Veterans who served in the Republic of Vietnam during the qualifying period — and certain veterans who served in Thailand, Korea, Laos, Cambodia, Guam, American Samoa, and Johnston Atoll — are presumed to have been exposed to Agent Orange and other tactical herbicides. For the conditions on the §3.309(e) list, that presumed exposure plus a current diagnosis establishes service connection without a separate medical nexus opinion.
That is the entire point of a presumption: it removes the hardest element of a claim. You do not have to prove a doctor believes the herbicide caused your diabetes. You have to prove qualifying service and a qualifying diagnosis. Most Agent Orange denials we unwind were never really about the medicine — they were about the VA getting the service piece wrong.
Qualifying Service — Location by Location
Republic of Vietnam (Jan 9, 1962 – May 7, 1975)
Service on the landmass or inland waterways. Also, under the Blue Water Navy Vietnam Veterans Act of 2019, service in the 12-nautical-mile offshore zone now qualifies.
Thailand Royal Air Force Bases
U-Tapao, Ubon, Nakhon Phanom, Udorn, Takhli, Korat, and Don Muang. The PACT Act extended the qualifying window to Jan 9, 1962 – June 30, 1976 and removed the old requirement to prove perimeter duty.
Korean Demilitarized Zone
Service in or near the Korean DMZ between Sept 1, 1967 and Aug 31, 1971.
Laos, Cambodia (Mimot/Krek), Guam, American Samoa, Johnston Atoll
Added or clarified by the PACT Act, each with its own qualifying date range. Guam and American Samoa run Jan 9, 1962 – July 31, 1980; Johnston Atoll Jan 1, 1972 – Sept 30, 1977.
C-123 aircrew
Air Force and Air Force Reserve personnel who regularly operated, maintained, or served aboard contaminated C-123 aircraft between 1969 and 1986.
Herbicide storage and test sites
Documented domestic and foreign herbicide test/storage locations can support facts-found exposure even where no presumption applies.
Conditions on the Presumptive List
Ischemic heart disease (does not include hypertensive heart disease)
Type II diabetes mellitus
Parkinson’s disease and Parkinsonism
Prostate cancer, respiratory cancers (lung, bronchus, larynx, trachea)
Soft-tissue sarcoma, Hodgkin’s disease, non-Hodgkin’s lymphoma, multiple myeloma
Chronic B-cell leukemias, including hairy cell leukemia
AL amyloidosis, chloracne, porphyria cutanea tarda
Peripheral neuropathy, early-onset (must appear within one year of exposure)
Bladder cancer, hypothyroidism (added 2021)
Hypertension and monoclonal gammopathy of undetermined significance (MGUS), added by the PACT Act
Exposure Is About Where and When — Not Just Your MOS
Qualifying exposure is driven by where you served, when, and in some cases your unit and duties — not by your job title alone. A supply clerk at Udorn and a security policeman at Udorn have the same presumption. Establishing the qualifying service is the key that unlocks everything, and it is exactly where old denials can be reopened.
The proof is usually already in the file: your DD-214, personnel records (DA-20, AF Form 7, service treatment locations), travel and TDY orders, unit morning reports, and ship deck logs. When the record is thin, buddy statements placing you at a named installation on named dates can carry the day.
Nehmer — the Retroactive Back-Pay Rule Most Veterans Never Hear About
Under §3.816, Vietnam herbicide veterans are Nehmer class members. When the VA adds a new condition to the presumptive list, a previously denied claim for that same condition gets an effective date reaching back to the date of the original claim — not the date of the new law. That is the difference between a few months of back pay and a decade of it.
This matters enormously right now. Hypertension joined the list under the PACT Act. If you filed for hypertension in 2009 and were denied, a properly framed Nehmer claim can reach back to 2009. If a Nehmer class member died, a surviving spouse or child may be entitled to the accrued benefit.
The Advocate’s Take
If you were denied before hypertension, bladder cancer, hypothyroidism, or MGUS joined the presumptive list, that denial deserves a fresh look — and under §3.816 the effective-date fight alone can be worth more than the rating.
When the Presumption Does Not Apply — Facts-Found Service Connection
A presumption is a shortcut, not the only route. If your condition is not on the §3.309(e) list, or your service does not fall in a presumptive location or window, you can still win on a direct, facts-found basis under §3.303(d) by proving actual exposure and a medical nexus. The Federal Circuit made clear in *Combee v. Brown* that the herbicide presumption does not bar direct service connection.
That route needs three things: evidence of actual exposure (unit records, herbicide test/storage site documentation, buddy statements), a current diagnosis, and a medical opinion linking the two at the at-least-as-likely-as-not standard.
Second-Generation Claims
Agent Orange did not stop with the veteran. Spina bifida (other than spina bifida occulta) in the biological child of a Vietnam or Korean DMZ veteran is compensable under §3.814, and children of women Vietnam veterans may qualify for benefits for certain other covered birth defects under §3.815. These are separate claims filed on behalf of the child, and they are badly under-claimed.
Evidence That Wins Agent Orange Claims
DD-214 and full personnel file showing dates and locations of service
Travel, TDY, and PCS orders placing you at a qualifying installation
Unit morning reports, ship deck logs, or squadron histories
Buddy statements naming the base, the dates, and your duties
Current diagnosis from a treating physician, with the specific listed condition named
Prior denial letters — required to identify a Nehmer effective-date claim
Where the VA Gets This Wrong
The three most common errors we correct: rating hypertensive heart disease as if it were ischemic heart disease and denying it; refusing Thailand claims for lack of perimeter duty even after the PACT Act removed that requirement; and awarding a newly-listed condition with a current-year effective date when §3.816 requires reaching back to the original claim.
Building a Vietnam Veterans & Agent Orange Claim That Wins
Every claim stands on three legs. Knock one out and the claim falls over, no matter how bad your symptoms are. Before you file, look at your file and find all three.
A current diagnosis
A doctor has to say you have it, now, in writing. Not "reports symptoms of" — a diagnosis. Without this leg, nothing else in the file matters.
A link to your service
An event, an injury, an exposure, or an already service-connected condition. Service records, unit records, buddy statements, and your own account all count as evidence.
A nexus that ties the two together
A medical opinion stating it is at least as likely as not that your service caused or aggravated the condition. That phrase is a legal standard: 50 percent or better. It is the leg most denials break.
Document the problem before you file
• Keep a dated symptom log for at least 30 days. Frequency, severity, and what it stopped you from doing.
• Get statements from people who see it — a spouse, a coworker, a battle buddy. Lay evidence is legal evidence.
• Pull your private treatment records. The VA only has to help; it does not have to go find everything.
• Write down what you have stopped doing. Lost work, lost sleep, lost activities. That is what impairment looks like on paper.
Your Rights in This Process
It costs nothing to file
Filing a VA claim is free. Accredited representatives may only charge for work on an appeal after an initial decision, and those fees are capped by 38 CFR §14.636.
The VA has a Duty to Assist you
Under 38 CFR §3.159 the VA must help you get the evidence it needs, and it must tell you what is missing before it denies you for missing it.
You can ask for a different examiner
You may request a trauma-informed clinician, or a clinician of a specific gender, for a C&P examination. Ask before the exam is scheduled.
You can claim every condition you have
There is no limit and no penalty. Primary conditions, secondary conditions, and conditions made worse by service all get filed.
You can appeal and be re-evaluated
A denial is not the end. You may submit new evidence, request a higher-level review, appeal to the Board, and ask for re-evaluation when your condition worsens.
You must be considered for TDIU
If your service-connected conditions keep you from holding substantially gainful employment, you may be paid at the 100 percent rate without a 100 percent rating.
When You Are Ready to File
Talk to an accredited representative before you file. It costs nothing to ask, and the order you file in changes what the VA is allowed to award you. Albert L. Thombs Jr. is VA-Accredited Claims Agent #45147.
The application itself
This is the form that opens a disability compensation claim. List every condition you are claiming, and name the secondary conditions explicitly.
Release for private records
Authorises the VA to request records from your private doctors. Without it, treatment outside the VA may never reach your file.
Lay or buddy statement
The official form for your own statement and for statements from people who witnessed the event or the change in you.
Resources Worth Keeping
These are real, staffed VA lines. Tap to call from your phone.
Veterans Crisis Line
988
Then press 1. Text 838255. Available 24 hours a day, every day. You do not need to be enrolled in VA health care.
VA Benefits & Facility Line
1-800-827-1000
Claim status, general benefits questions, and help finding the right VA office.
Women Veterans Call Center
1-855-829-6636
Call or text. Staffed by women veterans who can connect you to services in your area.
Vet Centers
1-877-927-8387
Community-based counselling for combat veterans and their families. No VA enrollment required.
Talk to a VA-accredited claims agent about vietnam veterans & agent orange
Albert L. Thombs Jr. is a US Army veteran, VA-Accredited Claims Agent #45147, and 100% service-connected himself. He personally reviews every request. Fees are capped by 38 CFR §14.636 — and there are no fees unless you win.
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