When your VA decision letter says your participation in a conceded toxic exposure risk activity is accepted, the VA is telling you it agrees you were exposed to hazardous substances during military service. You do not have to prove that exposure happened. What still has to be resolved is whether your current health condition is connected to it, and that question follows one of two very different paths depending on your diagnosis.
What a Concession Removes From Your Claim
In VA claims language, “conceded” means the agency has accepted a fact as true. The VA has reviewed your service records, deployment locations, and dates, and determined you were present in a hazardous environment. That determination stands unless clear evidence to the contrary appears later, which is rare once a concession is in your file.
This matters because proving in-service exposure is often the hardest part of a toxic exposure claim. Military records from decades ago can be incomplete, and individual exposure documentation barely existed before the PACT Act. A concession removes that evidentiary obstacle and shifts the entire focus of your claim to the medical question: is your diagnosed condition linked to that exposure?
Which Exposures the VA Recognizes as a TERA
A toxic exposure risk activity (TERA) is any service-related event, location, or duty that placed you in contact with hazardous substances. The definition sits in 38 U.S.C. § 1710(e)(4), and the VA relies on your deployment history to decide whether you qualify.1Office of the Law Revision Counsel. United States Code Title 38 – 1168 Medical Nexus Examinations for Toxic Exposure Risk Activities The recognized categories include:
- Burn pit exposure during service in Iraq, Afghanistan, Syria, Southwest Asia, or other post-9/11 deployment zones where open-air burn pits disposed of waste.
- Herbicide agents, including Agent Orange, during service in Vietnam, Thailand, or near the Korean DMZ during the Vietnam era.
- Contaminated drinking water at Camp Lejeune or MCAS New River between August 1953 and December 1987.
- Radiation exposure from nuclear weapons testing, cleanup operations, or service at recognized radiation-risk locations.
- Chemical warfare agents such as mustard gas or lewisite during military testing programs.
- Airborne hazards, including fine particulate matter, depleted uranium, jet fuel vapors, volatile organic compounds, PFAS, and asbestos.2Federal Register. VA Adjudication Regulations for Disability or Death Benefit Claims Based on Toxic Exposure
The VA does not require you to prove that your specific unit ran a burn pit or that you personally handled a contaminant. Any veteran who served in Afghanistan, Iraq, or a dozen other countries on or after August 2, 1990, is presumed exposed to burn pits or other toxins based on where and when they served.3U.S. Department of Veterans Affairs. Exposure to Burn Pits and Other Specific Environmental Hazards
What Happens Next: Presumptive vs. Direct Service Connection
Once exposure is conceded, your claim moves onto one of two tracks. Knowing which one applies to your diagnosis should be the first thing you sort out, because the evidence you need is very different.
Presumptive Service Connection
If your diagnosed condition appears on the VA’s presumptive list for your type of exposure, the VA presumes the link between your service and your condition. You do not need a nexus letter, an independent medical opinion, or an expert to explain the mechanism. You only need a current diagnosis and proof that you meet the service requirements for the presumption.4U.S. Department of Veterans Affairs. Exposure to Burn Pits and Other Specific Environmental Hazards – Section: What Does It Mean to Have a Presumptive Condition for Toxic Exposure With a concession already in hand, that is essentially the whole case.
Direct Service Connection
If your condition is not on any presumptive list, the concession still satisfies the in-service event element, but you will need a medical opinion connecting your specific condition to the exposure. Under 38 U.S.C. § 1168, the VA must provide you a medical examination and obtain a nexus opinion when there is evidence of a disability, evidence of TERA participation, and an indication of an association between the two.1Office of the Law Revision Counsel. United States Code Title 38 – 1168 Medical Nexus Examinations for Toxic Exposure Risk Activities The examiner must consider the total potential exposure across all your deployments, not a single incident or substance.
The practical difference is large. A veteran with a conceded burn pit exposure and a diagnosis of constrictive bronchiolitis, which is presumptive, has a straightforward path. A veteran with the same conceded exposure but a condition off the presumptive list faces a longer process and often needs favorable outside medical evidence to prevail.
Presumptive Condition Lists That May Match Your Exposure
The presumptive lists differ depending on which exposure the VA has conceded. Match your diagnosis against the list that fits your service.
Burn Pit and Airborne Hazard Exposure
Presumptive cancers for Gulf War era and post-9/11 veterans include brain cancer, gastrointestinal cancer of any type, glioblastoma, head or neck cancer, kidney cancer, lymphoma, melanoma, pancreatic cancer, reproductive cancer, and respiratory cancer of any type.5Veterans Affairs. The PACT Act and Your VA Benefits
Presumptive respiratory and lung conditions include asthma diagnosed after service, chronic bronchitis, COPD, chronic rhinitis, chronic sinusitis, constrictive or obliterative bronchiolitis, emphysema, granulomatous disease, interstitial lung disease, pleuritis, pulmonary fibrosis, and sarcoidosis.5Veterans Affairs. The PACT Act and Your VA Benefits
Agent Orange and Herbicide Exposure
Vietnam-era veterans with conceded herbicide exposure have a separate presumptive list that includes Type 2 diabetes, ischemic heart disease, prostate cancer, bladder cancer, Parkinson’s disease, multiple myeloma, non-Hodgkin’s lymphoma, and chronic lymphocytic leukemia. The PACT Act added hypertension and monoclonal gammopathy of undetermined significance (MGUS).6VA.gov. Presumptive Service Connection Eligibility
Camp Lejeune Water Contamination
Veterans stationed at Camp Lejeune during the contamination period have presumptive conditions including adult leukemia, aplastic anemia, bladder cancer, kidney cancer, liver cancer, multiple myeloma, non-Hodgkin’s lymphoma, and Parkinson’s disease.6VA.gov. Presumptive Service Connection Eligibility
If your diagnosis appears on the list that matches your conceded exposure, the VA should grant service connection without requiring an independent nexus opinion.
The C&P Exam After a Concession
The VA will usually schedule a Compensation and Pension (C&P) exam even after conceding exposure. This is not treatment. It is an evaluation designed to assess your current condition and, for direct service connection claims, to produce a nexus opinion.
The examiner reviews your medical records, asks about symptoms and service history, and performs a physical exam relevant to the claimed condition. For TERA claims the examiner is required to consider the combined effect of all your toxic exposures across every deployment. The standard is whether your condition is “at least as likely as not” connected to your service, meaning a 50 percent or greater probability.7Veterans Affairs. Eligibility for VA Disability Benefits
For a presumptive condition, a C&P exam may still be ordered, but its purpose narrows to confirming the diagnosis and assessing severity for your disability rating. The service-connection question should already be settled by the concession plus the diagnosis.
Effective Dates and Back Pay
The effective date the VA assigns determines whether you receive retroactive payments, and the difference can be significant.
For presumptive claims, if the VA receives your claim within one year of separation from active service, the effective date can go back to the date you first developed the illness. Filing more than a year after separation sets the effective date at the later of the filing date or the date the condition first appeared.8Veterans Affairs. Disability Compensation Effective Dates
For claims tied to a change in law, such as the PACT Act adding new presumptive conditions, filing within one year of the law change can set the effective date to the date the law took effect. Filing or requesting review more than a year after the change can push the effective date back up to one year before the VA received your request.8Veterans Affairs. Disability Compensation Effective Dates
Filing an Intent to File locks in your potential effective date and gives you one year to submit the completed claim. If you are still gathering medical records or waiting for a diagnosis, submitting an Intent to File immediately protects months of retroactive benefits you would otherwise lose.9Veterans Affairs. Your Intent to File a VA Claim
If the Claim Is Still Denied
A concession of exposure does not guarantee approval. The VA may deny the claim because there is no current diagnosis, because a C&P examiner returned an unfavorable nexus opinion, or because the evidence fell short of the standard. You have three options within one year of the decision date.10Veterans Affairs. Choosing a Decision Review Option
- A Supplemental Claim lets you submit new and relevant evidence the VA did not previously consider, such as a private medical opinion or records that were missing. Use VA Form 20-0995.
- A Higher-Level Review asks a more senior reviewer to look at the same evidence for errors. You cannot add new evidence, so this fits when you believe the original decision misapplied the law. Use VA Form 20-0996.
- A Board Appeal sends the case to a Veterans Law Judge at the Board of Veterans’ Appeals. You can choose direct review, submit additional evidence, or request a hearing. Use VA Form 10182.
The one-year deadline applies to Higher-Level Review and Board Appeal. Miss that window and you will need a Supplemental Claim with new and relevant evidence.10Veterans Affairs. Choosing a Decision Review Option When the denial rests on an unfavorable nexus opinion, obtaining a private medical opinion that addresses the full scope of your conceded exposures and resubmitting as a Supplemental Claim is usually the most productive next step.