Constrictive Bronchiolitis
Constrictive (obliterative) bronchiolitis — a signature burn-pit lung injury.
Constrictive bronchiolitis — also called bronchiolitis obliterans — is one of the signature lung injuries of the burn-pit era. It scars the smallest airways deep in the lungs, and it can leave a veteran badly short of breath even when a routine chest X-ray and standard breathing test look near normal.
It is recognized under the PACT Act’s airborne-hazard framework. Here is what it is, why it is tied to burn pits, and how the VA rates it.
Understanding Constrictive Bronchiolitis
Constrictive bronchiolitis is inflammation and scarring that narrows the bronchioles — the tiniest airways in the lungs. It causes shortness of breath and reduced exercise tolerance, and because it affects the smallest airways, it can be missed without specialized testing or, in some cases, a lung biopsy.
The exposure link the VA now accepts for you
This condition is strongly associated with inhaling the fine particulate and chemical smoke of open-air burn pits. It became a defining diagnosis among post-9/11 veterans and is recognized under the PACT Act’s airborne-hazard provisions.
Because this is a presumptive condition, you do not have to prove the science of how your service caused it. If you have a qualifying diagnosis and served in a covered location during a covered period, the VA presumes the connection — your job is to file, attend the exam, and make sure the rating reflects how badly it truly affects you.
Why this hits women differently
Women veterans with genuine deep-lung injury are especially likely to be told their normal-looking X-ray means nothing is wrong. Specialized pulmonary testing — and persistence — is what documents this injury and supports the rating.
What the VA Pays for Constrictive Bronchiolitis
Constrictive Bronchiolitis is rated under 38 CFR 4.97, Diagnostic Code 6825 (restrictive/interstitial lung disease). Here is exactly what each level requires, in plain English — not a table you have to decode.
FVC of 75–80% of predicted, or a DLCO (gas transfer) of 66–80% of predicted.
FVC of 65–74% of predicted, or a DLCO of 56–65% of predicted.
FVC of 50–64% of predicted, or a DLCO of 40–55%, or maximum exercise capacity of 15–20 ml/kg/min oxygen consumption.
FVC under 50%, or a DLCO under 40%, or maximum exercise capacity under 15 ml/kg/min, or cor pulmonale, or the need for outpatient oxygen therapy.
Source: 38 CFR 4.97, Diagnostic Code 6825 (restrictive/interstitial lung disease). Every percentage here is a starting point set by federal regulation, not a promise — your actual rating depends on your records and exam. An accredited representative can confirm exactly what fits your case.
One rating is rarely the whole picture
This condition does not stand alone. The VA combines it with every other service-connected condition you carry using its combined-ratings math — so a presumptive claim can push your overall rating higher than this one number suggests. And if your toxic-exposure conditions together make it impossible to hold steady, gainful work, you may qualify for TDIU (Total Disability based on Individual Unemployability) and be paid at the 100% rate even if no single condition reaches 100%. This is one of the most overlooked ways women veterans are underpaid.
Getting this rated at its true severity
Push for complete pulmonary function testing including DLCO and, where appropriate, specialized imaging, because standard tests can under-read this injury. Keep your exposure history in the file. An accredited representative can help make sure the testing is thorough and the rating reflects the real damage.
Do you qualify for Constrictive Bronchiolitis?
Under the PACT Act, a presumptive claim comes together when two things are true at once: you have a diagnosis of constrictive bronchiolitis, and your service falls inside one of the covered toxic-exposure windows below. When both are met, the VA presumes your condition is service-connected — you do not have to prove how the exposure caused it.
Post-9/11 service
Afghanistan, Djibouti, Egypt, Jordan, Lebanon, Syria, Uzbekistan or Yemen — or the airspace above them — on or after September 11, 2001.
Gulf War-era service
Bahrain, Iraq, Kuwait, Oman, Qatar, Saudi Arabia, Somalia or the United Arab Emirates — or the airspace above them — on or after August 2, 1990.
Agent Orange & other exposures
Vietnam, Thailand, the Korean DMZ, Camp Lejeune and other recognized sites each carry their own presumptive rules and dates on top of the burn-pit windows.
Not sure whether your dates and locations line up? That is one of the most common reasons a valid claim gets denied — and one of the easiest to fix with the right records. An accredited representative can confirm your covered service before you file.
Filing a claim for Constrictive Bronchiolitis, step by step
You can file a PACT Act claim on your own — but knowing the order of operations keeps it from stalling. Here is what the process looks like from start to decision.
Confirm the diagnosis
Make sure the condition is documented in your medical records — from the VA or a private doctor. A clear, current diagnosis is the first half of a presumptive claim.
Establish your covered service
Pull your DD-214, deployment orders and duty history to show you served in a covered location during a covered period. This is the second half — and once both are met, the VA presumes the link.
File the claim
File for disability compensation and specify the condition and your toxic exposure. You can file it yourself, but an accredited representative can file it correctly the first time and make sure nothing is left off.
Attend the C&P exam
The VA will schedule a Compensation & Pension exam. Describe your symptoms on your worst days, not your best — the rating is set from what the examiner records.
You do not have to do this alone
A free, no-obligation record review will tell you whether constrictive bronchiolitis fits the presumptive rules for your service — and exactly what to file. Scroll down to request yours.
The PACT Act & Toxic Exposure, Explained
A couple of clear, trustworthy explainers on the PACT Act and toxic-exposure benefits from official sources. Watch whenever you are ready.
The PACT Act and Your VA Benefits
The Department of Veterans Affairs explains what the PACT Act changed — expanded health care, new presumptive conditions, and who qualifies after toxic exposure.
Ask About the Toxic Exposure Screening
The Veterans Health Administration walks through the free 5–10 minute toxic exposure screening every enrolled veteran can get — and why it starts your exposure record.
These videos are shared for general education from official and third-party sources. They are not legal advice, and watching them is never required to get help with your claim.
See every presumptive condition, or read how the PACT Act works.
Think this fits your record?
We focus on veterans the VA has already denied or under-rated. We do not take brand-new (initial) claims, and we do not take every case.
Guidance from a VA-accredited claims agent (#45147). Any figures are estimates that depend on your situation and the VA's decision — not legal or medical advice, and not the VA.