Senior Care Authority Share: Senior Services Senior Care Authority Visit Website Request Info 1040 S. Claremont St. San Mateo, CA 94402 (650) 504-8549 (650) 358-9254 (fax) About Map About We are a placement and referral agency for seniors and their families. We place the elderly in assisted living, skilled nursing, memory care, independent living, and make other referrals for their car What's Nearby? Distance: 5 10 15 20 25 50 mi.