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Nexus Letters for Asthma
Licensed Physician, MD | Patriot Path Medical Team
Specializing in VA respiratory evaluations and independent medical opinions • Last updated: June 2026
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Asthma is one of the conditions the PACT Act changed the most. Veterans who breathed burn-pit smoke in Iraq, Afghanistan, or the wider Gulf used to fight for years to link their asthma to service. Now, for many of them, the VA presumes the link. The old rule that asthma had to show up within 10 years of leaving service is gone.
But a presumption is not automatic. Plenty of asthma claims still turn on the medical evidence. Our physicians connect your asthma to your service, or document how bad it really is, in the language the VA expects. One flat fee of $1,500, and the first consultation is free.
How VA Rates Asthma
The VA rates asthma under 38 C.F.R. § 4.97, Diagnostic Code 6602. It looks at three things: your FEV-1, your FEV-1/FVC ratio, and the treatment your asthma takes. FEV-1 is a breathing-test score, given as a percent of what is normal for you. FEV-1/FVC is another breathing-test number. Whichever of the three points to the highest rating is the one the VA uses. Here is the rule, word for word, then what each level looks like.
"FEV-1 less than 40-percent predicted, or; FEV-1/FVC less than 40 percent, or; more than one attack per week with episodes of respiratory failure, or; requires daily use of systemic (oral or parenteral) high dose corticosteroids or immuno-suppressive medications ... 100. FEV-1 of 40- to 55-percent predicted, or; FEV-1/FVC of 40 to 55 percent, or; at least monthly visits to a physician for required care of exacerbations, or; intermittent (at least three per year) courses of systemic (oral or parenteral) corticosteroids ... 60. FEV-1 of 56- to 70-percent predicted, or; FEV-1/FVC of 56 to 70 percent, or; daily inhalational or oral bronchodilator therapy, or; inhalational anti-inflammatory medication ... 30. FEV-1 of 71- to 80-percent predicted, or; FEV-1/FVC of 71 to 80 percent, or; intermittent inhalational or oral bronchodilator therapy ... 10."
| Rating | What it generally takes | Monthly pay (approx) |
|---|---|---|
| 100% | FEV-1 under 40%, or FEV-1/FVC under 40%, or more than one attack a week with breathing failure, or daily high-dose oral steroids or immune-suppressing drugs. | ~$3,939/mo |
| 60% | FEV-1 of 40 to 55%, or FEV-1/FVC of 40 to 55%, or at least monthly doctor visits for flare-ups, or three or more courses of oral steroids a year. | ~$1,435/mo |
| 30% | FEV-1 of 56 to 70%, or FEV-1/FVC of 56 to 70%, or a daily inhaler (bronchodilator or inhaled anti-inflammatory).Most Common | ~$552/mo |
| 10% | FEV-1 of 71 to 80%, or FEV-1/FVC of 71 to 80%, or an inhaler you use now and then (not every day). | ~$180/mo |
Two things decide an asthma rating. First, the VA uses whichever is worst: your breathing-test scores or the treatment your asthma takes. So a veteran with near-normal breathing tests can still reach 30% on daily inhaler use alone. Monthly flare-up visits or repeated steroid courses can reach 60%. Keep your pulmonary function test (PFT) results and your medication list together. Either one can set the rating. Second, the rule has no 0% row for asthma. But if your records do not meet the 10% mark, a 0% rating can still be assigned. That keeps the condition service-connected. One more point from the rule: your asthma may be quiet on the day of the exam. If so, a verified history of asthma attacks in your records still counts.
Pay figures are approximate 2026 rates (effective December 1, 2025) for a single veteran with no dependents. Check VA.gov for current amounts.
Estimate your likely asthma rating (DC 6602)
Asthma is rated on the worst of your breathing-test scores or your treatment. Answer about whichever fits you. This is a rough guide, not a rating. The VA decides your claim on your records and its own exam.
Making a VA Disability Claim for Asthma
A VA disability claim for asthma needs three things to line up:
A current diagnosis
An asthma diagnosis from a provider, backed by your treatment record and, where possible, a pulmonary function test (PFT).
A service connection
Either asthma that began in service, the burn-pit presumptive path, or a link to another service-connected condition.
A medical nexus
A qualified opinion that your asthma is 'at least as likely as not' connected to your service, or to a service-connected cause.
For many post-9/11 and Gulf War veterans, the presumptive path does the heavy lifting. Asthma diagnosed after service is presumptive for veterans who served in the covered burn-pit locations. The VA accepts the link, so you may not need a nexus letter for the asthma itself. A nexus letter earns its keep where the presumption does not reach. That means asthma that began in service without qualifying burn-pit exposure. It means asthma worsened by a service-connected condition. And it means a claim the VA denied for a weak link. The 'at least as likely as not' standard (a 50% or better chance) comes from the benefit-of-the-doubt rule in 38 U.S.C. § 5107(b), carried out in 38 C.F.R. § 3.102.
How to Connect Asthma to Service
There are a few ways to tie asthma to your service. For many veterans the burn-pit presumptive path is the strongest. The PACT Act now presumes the link for asthma diagnosed after qualifying service.
Presumptive (burn pits / PACT Act)
Asthma diagnosed after service is presumptive for veterans exposed to burn pits and fine airborne particles (38 C.F.R. § 3.320). If you had qualifying service, the VA accepts the link.
- Qualifying service. Service in the Southwest Asia theater on or after August 2, 1990, can qualify you. So can service in Afghanistan, Syria, Djibouti, or Uzbekistan on or after September 19, 2001.
- No 10-year limit. The old rule that asthma had to appear within 10 years of separation was repealed by the PACT Act. Asthma that shows up at any time after qualifying service can qualify.
- No nexus needed. On a presumptive claim you do not have to prove the cause. You still need a current asthma diagnosis and proof of qualifying service.
Direct connection
Asthma began in service, or was first diagnosed while you served.
- A diagnosis in service. Being treated for asthma, wheezing, or breathing trouble, or being prescribed an inhaler, while on active duty.
- Onset soon after service. Asthma that appeared in the years right after service can still support a direct claim with the right medical opinion.
Secondary connection
Another service-connected condition caused or worsened your asthma (38 C.F.R. § 3.310).
- Chronic sinus and nasal disease. Service-connected chronic sinusitis or rhinitis can drive or worsen asthma. Doctors call this link 'one airway, one disease.'
- GERD. Acid reflux can irritate the airways and worsen asthma. So asthma secondary to service-connected GERD is worth a look.
Aggravation
You had asthma before service, and service made it permanently worse.
- Worse during service. On active duty, your asthma attacks grew more frequent or severe, or your treatment had to be stepped up. The change went beyond normal change over time.
Secondary Conditions
Asthma rarely travels alone. It runs with the upper airway and the gut, and it strains the heart over time. Each link the VA can rate is rated separately and added to your combined rating. So they are worth documenting.
Asthma may be secondary to
- Chronic sinusitis or rhinitis. Service-connected sinus and nasal disease can trigger or worsen asthma. The upper and lower airway are closely linked, so one often drives the other.
- GERD. Acid reflux can reach the airways and worsen asthma. That supports asthma secondary to service-connected GERD.
- Burn-pit and airborne exposures. The same exposures that cause asthma can also cause sinusitis and rhinitis. The VA presumes the link for veterans with qualifying service.
Conditions that may be secondary to asthma
- Sleep apnea. Poorly controlled asthma and its treatment are linked to obstructive sleep apnea. Sleep apnea is rated on its own under the respiratory system.
- Chronic respiratory failure. Severe, long-standing asthma can lead to chronic breathing problems that carry their own higher ratings.
- Anxiety and depression. Living with a long-term breathing condition can contribute to a mental-health condition. That condition may itself be claimable.
What to Gather - Evidence Checklist
Gather these before you file or ask for a letter. For asthma, your breathing-test results and your medication record do the heavy lifting. The rating turns on whichever is worst.
Frequently Asked Questions
How does the VA rate asthma?
Under 38 C.F.R. 4.97, Diagnostic Code 6602. The VA looks at your FEV-1 and FEV-1/FVC breathing-test scores and the treatment your asthma takes. It uses whichever points to the highest rating. An inhaler used now and then is 10%. A daily controller inhaler is 30%. Monthly flare-up visits or three or more oral-steroid courses a year is 60%. Daily high-dose oral steroids, or breathing-test scores under 40%, is 100%.
Is asthma a PACT Act presumptive condition?
Yes, for many veterans. Asthma diagnosed after service is presumptive for veterans who served in the covered burn-pit locations. Those include the Southwest Asia theater from August 2, 1990, and Afghanistan, Syria, Djibouti, or Uzbekistan from September 19, 2001. The PACT Act repealed the old rule that asthma had to appear within 10 years of separation. Now asthma that shows up at any time after qualifying service can qualify.
Can I get a higher asthma rating from my medication alone?
Yes. The rating uses whichever is worst, your breathing tests or your treatment. Daily inhaler use supports 30% on its own, even with near-normal breathing tests. Monthly flare-up visits or three or more oral-steroid courses a year support 60%. That is why your medication list and flare-up records matter as much as your pulmonary function test.
Why is my asthma only rated 30%?
Because 30% covers asthma controlled with a daily inhaler. That fits many veterans. To reach 60%, you generally need monthly visits for flare-ups, three or more oral-steroid courses a year, or breathing-test scores of 40 to 55%. Worse findings rate higher still. Keeping a record of every flare-up visit and steroid course is often what moves the rating up.
Do I need a nexus letter for asthma?
If your asthma was diagnosed after qualifying burn-pit service, it may be presumptive. In that case you may not need a nexus letter for the asthma itself. A nexus letter earns its keep where the presumption does not reach. That means asthma that began in service without qualifying exposure. It means asthma worsened by a service-connected condition like sinusitis or GERD. And it means a claim denied for a weak link. That medical opinion is what we write.
Burn pits changed the asthma rules. Make your claim show it.
Let our physicians prepare an asthma nexus letter that meets the VA's evidence standards. It backs the benefits you earned.
Sources & Regulatory References
- VA disability compensation (VA.gov) https://www.va.gov/disability/
- 2026 VA disability compensation rates (VA.gov) https://www.va.gov/disability/compensation-rates/veteran-rates/
- 38 CFR 4.97, Schedule of ratings, respiratory system, including DC 6602 (eCFR) https://www.ecfr.gov/current/title-38/section-4.97
- 38 CFR 3.320, Presumptive service connection for particulate-matter conditions (eCFR) https://www.ecfr.gov/current/title-38/section-3.320
- The PACT Act and your VA benefits (VA.gov) https://www.va.gov/resources/the-pact-act-and-your-va-benefits/
- Burn pits and other airborne hazards (VA.gov) https://www.va.gov/disability/eligibility/hazardous-materials-exposure/specific-environmental-hazards/
- 38 CFR 3.310, Secondary service connection (eCFR) https://www.ecfr.gov/current/title-38/section-3.310
- 38 U.S.C. 5107, Benefit of the doubt (Cornell LII) https://www.law.cornell.edu/uscode/text/38/5107