FEV-1 less than 40 percent of predicted value, or; the ratio of
Forced Expiratory Volume in one second to Forced Vital Capacity
(FEV-1/FVC) less than 40 percent, or; Diffusion Capacity of the
Lung for Carbon Monoxide by the Single Breath Method (DLCO
(SB)) less than 40-percent predicted, or; maximum exercise capacity
less than 15 ml/kg/min oxygen consumption (with cardiac or
respiratory limitation), or; cor pulmonale (right heart failure), or;
right ventricular hypertrophy, or; pulmonary hypertension (shown
by Echo or cardiac catheterization), or; episode(s) of acute
respiratory failure, or; requires outpatient oxygen therapy ................................... 100
FEV-1 of 40- to 55-percent predicted, or; FEV-1/FVC of 40 to 55
percent, or; DLCO (SB) of 40- to 55-percent predicted, or;
maximum oxygen consumption of 15 to 20 ml/kg/min (with
cardiorespiratory limit) ...................................................................................... 60
FEV-1 of 56- to 70-percent predicted, or; FEV-1/FVC of 56 to 70
percent, or; DLCO (SB) 56- to 65-percent predicted............................................. 30
FEV-1 of 71- to 80-percent predicted, or; FEV-1/FVC of 71 to 80
percent, or; DLCO (SB) 66- to 80-percent predicted............................................. 10