How VA Rates COPD: DC 6604 Pulmonary Function Criteria

COPD, chronic bronchitis, and emphysema are rated under 38 CFR 4.97 using the General Rating Formula for Respiratory Conditions: 10% for FEV-1 of 71% to 80% predicted, or DLCO of 66% to 80%; 30% for FEV-1 of 56% to 70% predicted, or DLCO of 56% to 65%; 60% for FEV-1 of 40% to 55% predicted, or DLCO of 40% to 55%; and 100% for FEV-1 or DLCO of less than 40% predicted, or requiring continuous outpatient oxygen therapy.

Pulmonary function testing (PFT) is mandatory for rating COPD. Spirometry measures forced expiratory volume in one second (FEV-1) and forced vital capacity (FVC). In addition, diffusing capacity of the lung for carbon monoxide (DLCO) measures how efficiently oxygen moves from alveoli into the blood. The VA evaluates based on the most severe finding.

If a medical provider prescribes continuous, ambulatory, or nocturnal outpatient oxygen therapy based on documented hypoxemia, the condition automatically qualifies for a 100% evaluation under the general respiratory formula, regardless of whether spirometric numbers are higher.

COPD, emphysema, and chronic bronchitis are designated presumptive conditions under the PACT Act for veterans exposed to airborne toxic hazards during qualifying overseas deployments. Claimants do not need to prove an in-service chemical incident if eligible deployment records exist.

Under 38 CFR 4.96(a), ratings for respiratory conditions spanning Diagnostic Codes 6600 through 6817 and 6822 through 6847 generally may not be combined with each other. When a veteran is diagnosed with both COPD (DC 6604) and asthma (DC 6602), the VA does not combine the ratings. Instead, the VA assigns a single disability rating under the diagnostic code reflecting the predominant disability, with elevation to the next higher evaluation if the overall severity justifies it. While 38 CFR 4.14 prohibits pyramiding broadly, 38 CFR 4.96(a) is the specific regulation controlling coexisting respiratory diagnoses.