Barclays analyst Eric Percher downgraded athenahealth to Underweight saying the company's physician and revenue growth will decline moving forward. An analysis of the ambulatory enterprise market indicates that potential athenahealth targets among the 100 largest health systems number only 12, Percher tells investors in a research note. Big enterprise wins are needed to drive growth but are "few and far between," the analyst contends. He cut his price target for athenahealth to $110 from $140. The provider of cloud-based services for medical groups and health systems closed yesterday up $1.77 to $162.98.