To login to our Patient Portal, or to create a new Patient Portal account, please click the link below. Patient Portal ... to Top. Foothill Allergy, Asthma and Immunology, 622 West Duarte Road #108, Arcadia, CA, 91007, United States 6264451853. Foothill Allergy, Asthma and Immunology. 622 West Duarte Road, Suite #108, Arcadia, CA 91007. Phone ....