Asthma — VA Disability Rating Criteria (DC 6602)
Diagnostic Code 6602 · 38 CFR §4.97
What Is It?
Asthma is a chronic lung condition where your airways become inflamed and narrowed, making it hard to breathe. You may experience wheezing, chest tightness, coughing, and shortness of breath — especially during exercise, in cold air, or around allergens. Many veterans developed or worsened asthma during military service due to exposure to dust, burn pits, diesel exhaust, or other environmental irritants. The VA rates asthma based on how well your lungs function on breathing tests (pulmonary function tests or PFTs) and how much medication you need to keep symptoms under control.
Rating Criteria
| Rating | Criteria |
|---|---|
| 100% | Your FEV-1 is below 40 percent of predicted, or the FEV-1/FVC ratio is below 40 percent. A total rating also applies if you have more than one asthma attack per week with episodes of respiratory failure, or if you need daily use of systemic high-dose corticosteroids or immunosuppressive medications. |
| 60% | Your FEV-1 falls between 40 and 55 percent of predicted, or the FEV-1/FVC ratio is 40 to 55 percent. You also qualify here if you need at least monthly visits to a doctor for exacerbations, or if you require intermittent courses of systemic corticosteroids (like prednisone) to manage flare-ups. |
| 30% | Your FEV-1 measures between 56 and 70 percent of predicted, or the FEV-1/FVC ratio is between 56 and 70 percent. Alternatively, you qualify at this level if you need daily inhalational or oral bronchodilator therapy, or if you need inhalational anti-inflammatory medication to stay stable. |
| 10% | Your breathing tests show an FEV-1 between 71 and 80 percent of what is predicted for someone your age and size, or the ratio of FEV-1 to FVC falls between 71 and 80 percent. At this level you may need an inhaler occasionally but your lung function is only mildly reduced. |
Evidence Needed
The most important evidence is pulmonary function test (PFT) results showing your FEV-1 and FEV-1/FVC ratio. You should also document your medications — especially if you use daily inhalers, nebulizers, or oral steroids. Keep records of emergency room visits or urgent care trips for asthma attacks. A letter from your treating doctor describing the frequency and severity of your episodes strengthens your claim significantly.
C&P Exam Tips
The C&P examiner will likely order PFTs if recent results are not available. Do not use your rescue inhaler right before the test — the VA wants to see your baseline lung function. Be honest about your worst days, not just how you feel at the exam. Mention every trigger (dust, exercise, cold, chemicals) and describe how attacks affect your daily routine. If you have been prescribed a nebulizer or oral steroids, make sure your medical records reflect those prescriptions.
How to File
File under DC 6602. Include your PFT results, medication list, and any treatment records showing emergency visits or steroid use. If your asthma is connected to burn pit exposure, reference the PACT Act presumptive conditions. A nexus letter linking your military environmental exposures to your current asthma diagnosis can be very helpful.
Common Mistakes
The biggest mistake is not having recent PFT results in your file. Without objective breathing test numbers, the VA will likely schedule its own test — and a single test on a good day can underrate your condition. Another common error is not documenting steroid use. If your doctor prescribes oral prednisone for flare-ups, make sure every prescription is in your treatment records. Finally, many veterans forget to connect their asthma to specific in-service exposures like burn pits or JP-8 fuel.
Frequently Asked Questions
Can I get a VA rating for asthma that started after service?
Yes, if you can show that military exposures (burn pits, chemicals, dust) caused or aggravated your asthma. The PACT Act added several respiratory conditions as presumptive for veterans with toxic exposure histories.
What if my PFT results are normal on a good day?
Ask your doctor to document the variability of your condition. Asthma fluctuates, and the VA should rate based on your overall level of impairment, not just one snapshot. Keeping a symptom diary and having your doctor note your worst episodes helps.
Does using a rescue inhaler qualify me for a rating?
Using a rescue inhaler alone typically supports a 10 percent rating. Higher ratings require daily controller medications, more severe PFT results, or frequent exacerbations requiring medical intervention.