By Katie Kerwin McCrimmon More than 5,200 people are on a waiting list to receive primary care through Denver Health, and across Colorado at least 20,000 more low-income patients are waiting to receive care. In Denver, the waiting list at the citys safety net health system began in 2008 when the economy started its freefall. At its peak, Denver Health had 7,200 patients on its waiting list. About 80 percent of those waiting for care in Denver have no health insurance while the rest have either Medicaid, Medicare or private health insurance. The reality is that there are more patients…