Network participation and system affiliation represent two viable ways for hospitals to build and/or access necessary capacities to engage in the transformation to an integrated, patient-centered, pay-for-value model of care delivery. This policy brief tracks trends in network participation and system affiliation among U.S. general community hospitals from 2007 to 2012. Network participation increased in larger hospitals, non-government not-for-profit hospitals, and metropolitan hospitals. System affiliation generally increased in hospitals of all sizes and types. However, there are notably higher percentages of system affiliation among midsized and large hospitals, investor-owned hospitals, and metropolitan hospitals compared to their counterparts.