Office Information Our Locations Upland Office1113 Alta Ave Unit 220 Upland CA 91786909-985-9321909-985-0842 Doctors DR. ELBERT CHANG DR. SHAHRAM KHORRAMI DR. RICK SIRIRATSIVAWONG DR. JOHN KIM DR. NICOLAAS GROBLER DR. HAARIS NAJI, DO Montclair Office9525 Monte Vista Ave Suite 105 Montclair CA 91763909-626-1205909-625-1977909-399-9265 Doctors DR. ELBERT CHANG DR. SHAHRAM KHORRAMI DR. RICK SIRIRATSIVAWONG DR. JOHN KIM DR. HAARIS NAJI, DO DR. ATIF QADEER DR. JOSE SANTIAGO DR. ANDRES GONZALEZ DR. ALI SALEM DR. TIMOTHY WU N.P SURBHI UDESHI Sleep & Diagnostic Center 1113 Alta Ave Unit 205 Upland CA 91786909-670-0472909-670-0473 Contact Us