BLUE CROSS / BLUE SHIELD:. (800) 676-2583
AARP: Provider Express service (800) 227-7789
HILL PHYSICIANS: (925) 820-8300 fax (925) 820-4311
JOHN MUIR NETWORK: Trinity A provider rep 941-2172?. fax 952-287?
customer service 952-2887 utilization review fax 952-2865 (Heather)
NAVINET is used forthe following: AETNA, provider line (888) 632-3862
SCAN (MEDICARE HMO/ HILL) member services (800) 559-3500