Core Sites
Asthma and Allergy Associates, P.C. Robert A. Nathan, M.D.
2709 Nort Tejon Street
Colorado Springs, CO 80907
phone: 719.473.8330
Colorado Allergy & Asthma Centers, P.C. (Denver) David S. Pearlman, M.D.
125 Rampart Way
Suite 150
Denver, CO 80230
phone: 720.858.7510
Colorado Allergy & Asthma Centers, P.C. (Englewood) Leon Greos, M.D.
14000 E Arapahoe Road
Suite 260
Englewood, CO 80112
phone: 303.632.3646
Colorado Allergy & Asthma Centers, P.C. (Lakewood) Grant Olson, M.D.
1667 Cole Boulevard
Building 19, Suite 205
Lakewood, CO 80401-3300
phone: 303.432.9707
National Jewish Medical and Research Center Harold Nelson, M.D.
1400 Jackson Street
Denver, CO 80206
phone: 303.398.1467
 Rohit Katial, M.D.