- Baseline pulmonary function tests confirm that patient would medically qualify for Pulmonary Rehabilitation based on current guidelines. This means patient either has COPD, Global Initiative for Chronic Obstructive Lung Disease (GOLD) II-IV or meets the non-COPD qualifying definition below (FVC, forced expiratory volume at one second (FEV1), or diffusing capacity of lung for carbon monoxide (DLCO) < 65%) AND/OR patient is a current smoker (a non-COPD patient that is a smoker still has a modifiable risk factor; this will be a rare condition).