Agent Orange was a tactical herbicide the U.S. military sprayed across millions of acres in Vietnam, Korea, Thailand, and other locations between 1962 and 1975. Decades later, veterans who were exposed are developing cancers, diabetes, Parkinson's disease, and other serious conditions at elevated rates. The VA's answer is the presumptive service connection — if you served in a covered location during the covered period, you don't have to prove you were exposed. You just have to prove your diagnosis. This guide covers who is presumed exposed, the full 2025 list of recognized conditions, what the PACT Act changed, and exactly how to file your claim using VA Form 21-526EZ.
Ratings governed by 38 CFR § 3.307 — Presumptive Service Connection. See also: 38 CFR § 3.309 — Diseases Associated with Exposure to Certain Herbicide Agents, Public Law 102-4 — Agent Orange Act of 1991.
Agent Orange was a tactical herbicide used extensively by the U.S. military during the Vietnam War era to clear vegetation and deprive enemy forces of jungle cover. It was one of several herbicides used under the military's "Operation Ranch Hand" program — named for the color-coded stripes on the storage drums.
The compound earned its name from the orange-banded drums in which it was stored. Agent Orange was a 50-50 mixture of two herbicides, and one of its components contained a toxic byproduct: 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), commonly called "dioxin." Dioxin is classified as a known human carcinogen and persists in human tissue for years after exposure.
Approximately 19 million gallons of herbicides were sprayed over Vietnam, Laos, and Cambodia between 1962 and 1971. Soldiers who patrolled in sprayed areas, worked with aircraft that had carried the herbicide, or were stationed near storage areas were exposed through inhalation, skin contact, and ingestion of contaminated soil and water. The health consequences — cancers, neurological conditions, metabolic diseases, and others — have continued to emerge for decades.
The VA's response is the presumptive service connection framework under 38 CFR 3.307 and 3.309(e). If you served in a covered location during the covered time period, you are legally presumed to have been exposed to herbicides. You do not have to prove you personally walked through a sprayed area, touched Agent Orange, or were near a particular spray mission. The service record itself creates the presumption.
Under 38 CFR 3.307(a)(6), the VA recognizes herbicide exposure for veterans who served in specific locations during specific time periods. Each category has different evidentiary requirements.
Veterans who set foot on the landmass of the Republic of Vietnam — or served in the inland waterways (also known as "Brown Water Navy" service) — during this period are presumed exposed. Service records establishing presence in Vietnam during this window are sufficient. No additional exposure evidence is needed.
The presumption applies to Army, Marine Corps, Navy, Air Force, and Coast Guard veterans who served in-country. It does not matter whether you were in a combat or support role, or whether you personally encountered herbicide spraying.
Veterans who served in a unit assigned to the Korean DMZ during this specific window are presumed exposed. The herbicide spraying along the DMZ was documented by the National Academy of Sciences, and the VA recognizes this period as qualifying. Military records must confirm assignment to a DMZ unit during these dates.
Veterans who served on C-123 aircraft that were used to spray Agent Orange during Operation Ranch Hand, and who later flew on or worked on those same aircraft at various U.S. bases through the 1970s and 1980s, are presumed exposed. The residual contamination in the aircraft fuselages and equipment created ongoing exposure for flight crews, loadmasters, and maintenance personnel years after the aircraft left Vietnam.
Qualifying service must have included flying or working on C-123 aircraft used in Vietnam spraying operations — specifically the fleet of aircraft contaminated during Operation Ranch Hand. Unit records and aircraft tail numbers can help establish this.
U.S. military personnel who served at U.S. Air Force bases in Thailand from January 9, 1962 through May 7, 1975 may qualify for a presumption of exposure. The PACT Act of 2022 expanded the Thailand presumption to veterans who served at Royal Thai Air Force Bases used by U.S. forces during the Vietnam era, recognizing that herbicide perimeter spraying occurred at these locations.
The key bases that have been recognized include U-Tapao, Korat, Ubon, Nakhon Phanom, Udorn, Takhli, Don Muang, and Ubon RTAFB. Service records and unit assignment records are the primary evidence.
One of the most consequential expansions of Agent Orange presumptive coverage in recent years involved the "Blue Water Navy" — veterans who served on ships offshore in the territorial waters of Vietnam but did not set foot on the landmass.
For years, the VA denied Blue Water Navy veterans the herbicide presumption because they had not served "in country." The Blue Water Navy Vietnam Veterans Act of 2019 changed this. Effective January 1, 2020, veterans who served on ships operating in the territorial sea of the Republic of Vietnam between January 9, 1962 and May 7, 1975 are presumed to have been exposed to herbicides.
The territorial sea extends 12 nautical miles from the Vietnamese coastline. Veterans whose ships operated within this zone during the covered period qualify. Ship histories and service records documenting operations in Vietnamese territorial waters establish the presumption.
The VA maintains a list of ships that served in Vietnamese territorial waters. If your ship is on the list and your service records confirm you were aboard during the covered period, you qualify for the presumption. The list is available at benefits.va.gov. If your ship is not on the list, you may still qualify by submitting evidence of operations in Vietnamese waters — ship deck logs are obtainable through NARA.
Under 38 CFR 3.309(e), the VA has established the following conditions as presumptively associated with herbicide exposure. If you are presumed exposed (based on your service location) and you have a current diagnosis of any of these conditions, service connection is established — no nexus letter, no independent medical opinion, no exposure records required.
A few of these conditions require brief clarification:
Ischemic Heart Disease was added as a presumptive condition in 2010 and remains one of the most widely claimed. It includes coronary artery disease, angina pectoris, and other heart conditions resulting from reduced blood flow to the heart. If you've been diagnosed with any form of ischemic heart disease and you're a Vietnam-era veteran with covered service, you qualify.
Peripheral Neuropathy qualifies only for "early-onset" cases — meaning symptoms must have appeared within one year of the last known exposure and must have resolved or subsided to at least 10% disabling within two years. This is a relatively narrow window, and many veterans with later-onset peripheral neuropathy do not qualify under this presumptive. They may still be able to establish direct service connection or secondary connection through a nexus letter.
Chloracne must be confirmed by dermatology and must have appeared within one year of exposure. This is a specific type of acne-like skin condition directly caused by dioxin exposure and is diagnostically distinct from common acne.
Non-Hodgkin's Lymphoma is the most commonly claimed blood cancer in the Agent Orange presumptive list. All forms of NHL are covered, including follicular lymphoma, diffuse large B-cell lymphoma, mantle cell lymphoma, and others.
The Sergeant First Class Heath Robinson Honoring our Promise to Address Comprehensive Toxics (PACT) Act, signed into law on August 10, 2022, was the most significant expansion of VA benefits for toxic-exposed veterans in decades. Among its many provisions, the PACT Act added new presumptive conditions for Agent Orange-exposed veterans.
The PACT Act added the following cancers as presumptive for veterans with qualifying service under the Agent Orange framework:
The PACT Act also created a general presumption for veterans with covered service who develop any of 23 additional rare cancers. The expanded list is built on the National Academies of Sciences, Engineering, and Medicine (NASEM) framework and represents the VA's formal acknowledgment of associations that researchers had documented for years.
The PACT Act presumptives apply under the same service location rules — Vietnam in-country, Blue Water Navy, Korean DMZ, C-123 aircraft, and Thailand bases — as the original 38 CFR 3.309(e) list.
Use our PACT Act guide and tool to determine which conditions apply to your specific service history. The PACT Act expanded coverage well beyond Agent Orange — it also covers burn pit exposure, radiation exposure, and other toxic exposures from service in multiple eras.
Filing an Agent Orange claim is structurally simpler than most VA disability claims because you don't have to prove exposure. The three-step framework is:
VA Form 21-526EZ is the standard VA disability claim form. When filing an Agent Orange claim:
Attach to your claim:
You can also use our Rating Estimator to get a sense of what disability rating your condition might qualify for before you file.
This is one of the most important points in this entire guide: if you were previously denied for an Agent Orange condition that is now presumptive under the PACT Act, you may be entitled to benefits retroactively — but only if you file a new claim.
The PACT Act requires the VA to automatically review certain previously denied claims for newly added presumptive conditions. However, the review process has been uneven, and many veterans with newly qualifying conditions have not been proactively contacted. The safest approach is to file a Supplemental Claim (VA Form 20-0995) citing the PACT Act as new and relevant evidence.
The PACT Act also provides for "retroactive" review in specific circumstances — meaning if your claim is approved after a prior denial, your effective date may reach back to the original denial date. This can result in significant back pay.
Key steps if you were previously denied:
Do not simply refile as a new claim if you have a prior denial — a Supplemental Claim preserves your potential retroactive effective date more effectively. An accredited VSO or VA-accredited attorney can help you evaluate the best filing strategy for your specific situation.
Agent Orange's reach extends to the children of Vietnam veterans. Under 38 U.S.C. § 1802 and 38 CFR Part 3, subpart G, certain children of veterans with qualifying Vietnam service may receive compensation and healthcare from the VA for specific birth defects.
Spina bifida is the primary qualifying condition. Children of Vietnam veterans (and certain Korean DMZ veterans) who were born with spina bifida — except for the benign form known as spina bifida occulta — may receive a monthly monetary allowance and healthcare coverage through the VA.
The VA also covers a broader range of birth defects for children of female Vietnam veterans — specifically, any birth defect that resulted in the child's permanent physical or mental disability, except for conditions resulting from family disorder, birth trauma, or fetal/neonatal infirmity with well-established causes. Male veterans' children are limited to spina bifida (other than occulta) unless future rulemaking expands this.
To apply for the birth defect benefit, the eligible veteran parent submits VA Form 21-0304 on behalf of the child. Eligibility requires the veteran parent to have served in the Republic of Vietnam (or the Korean DMZ for spina bifida) during the covered period.
The beauty of the presumptive service connection framework is that you don't need a nexus letter for conditions on the recognized list. But there are situations where an independent medical opinion still helps — or is required:
For conditions on the presumptive list where you have qualifying service, the VA cannot require you to submit a nexus letter — but submitting strong current medical records with clear diagnostic findings still strengthens your claim by making the adjudicator's job easier.
If you're a Vietnam-era veteran with qualifying service and any of the conditions on the presumptive list, here is your action plan:
Agent Orange conditions are some of the most straightforward VA claims to establish once you understand the presumptive framework. The VA cannot deny service connection on an approved presumptive condition if your service and diagnosis are documented. The barrier isn't the law — it's awareness and the act of filing.
Vietnam veterans have waited long enough. If you or a family member served in a covered location and has one of these conditions, the claim is there to be filed.
Tell us where you served and what condition you have. We'll confirm your presumptive exposure category, review the full PACT Act list, and walk your 21-526EZ claim from start to submission — free.
Start Your Agent Orange Claim →