How to contact the community health center network? Contact Us. Community Health Center Network 101 Callan Avenue, Suite 300 San Leandro, CA 94577 Email: [email protected] Main Phone: 510-297-0200 Main Fax: 510-297-0209 CRS/TTY: call 7-1-1 or toll free 1-800-735-2929 Claims: 510-297-0210 UM Phone: 510-297-0220 UM Fax: 510-297-0222 Customer Care Fax: 510-297-0490.What is community health networks chn? Community Health Networks (CHN) is a unique partnership between employers and health care providers. CHN is a local non-profit health care network created to serve the health care needs of employers and employees living and working in the Central Valley of California.How do i contact community health choice member services? Community Health Choice Member Services cares about you. You can call Community Health Choice Member Services 24 hours a day, 7 days a week for help at 713-295-2294. We speak English, Spanish and other languages, too.How do i contact the va community care network? Regions 1, 2 and 3. Optum: VA Community Care Network. General Phone Number (for Providers Only): 888-901-7407. Monday–Friday, 7:00 a.m.–7:00 p.m. local time. Urgent Care Phone Number (for Providers Only): 888-901-6609. 7:00 a.m.–12:00 a.m. local time.