The American Medical Association says it strongly supports legislation that would change the way Medicare pays doctors, to emphasize quality care and not just sheer volume of services. The endorsement Monday from AMA President Ardis Dee Hoven provided a boost for a bipartisan bill moving through Congress. The bill would repeal the centerpiece of the current payment system. That approach relies on automatic cuts to doctors to limit Medicare spending and has proven unworkable. Instead, doctors would get five years of small increases while Medicare shifts its financial incentives to reward quality, cost-effective care.