Table 3.

Diagnostic categories and component diagnoses used in calculating the Lung Allocation Score. Adapted from Egen, et al.(2)

Group A	Group B	Group C	Group D
Bronchiectasis COPD	Eisenmenger’s  syndrome	Cystic Fibrosis Immune Deficiency	Bronchoalveolar carcinoma (BAC)
Emphysema (including A1ATD) LAM	Primary PAH Pulmonary vascular disease		Eosinophilic granuloma Hemosiderosis IPF
Sarcoidosis (without PAH)			Restrictive lung  disease
			Sarcoidosis with PAH Scleroderma/CREST Following lung transplant:  Bronchiolitis obliterans  Primary graft failure

COPD = Chronic obstructive pulmonary disease; A1ATD= Alpha 1 antitrypsin deficiency ; LAM = Lymphangioleiomyomatosis; PAH= Pulmonary arterial hypertension; IPF= Idiopathic pulmonary fibrosis; CREST = Calcinosis, Raynauds, esophageal dysmotility, scleroderma, telangectasias