To login to our Patient Portal, or to create a new Patient Portal account, please click the link below. Patient Portal Follow us on Social Media ... Arcadia, CA, 91007, United States 6264451853. Foothill Allergy, Asthma and Immunology. 622 West Duarte Road, Suite #108, Arcadia, CA 91007. Phone: (626) 445-1853 Fax: (626) 445-8627. Have Questions ....