If I could give them no stars, I would. SHAME ON YOU AARP UNITED HEALTH CARE. AARP United Healthcare is a cheap company. They keep raising the cost for customers (this year by 14%) but they are too cheap to allow a customer to pay their fee with American Express credit card. The miniscule additional charge that American Express charges merchants is negligible. The cost would be pennies for AARP United Healthcare, yet they are too stingy to pay a few pennies more to accommodate their customers who prefer to pay with their American Express card. Shame on you AARP United Health Care. SHAME ON YOU!