Affinity Participating Health Plans Commercial HMO Plans Aetna 1-800-756-7039 Anthem Blue Cross 1-800-333-0912 Blue Shield of California 1-888-568-3560 CIGNA 1-800-244-6224 Health Net 1-800-638-3889 Sutter Health Plus 1-855-315-5800 UnitedHealthcare 1-800-624-8822 Medicare Advantage HMO Plans Call us today at 888-309-2221, Monday-Friday, 8 am - 6 pm. We can answer any questions you may have ....