CONCORD — The former chief medical officer of a New Hampshire hospital has pleaded guilty to scheming to bilk Medicare of $1.9 million, federal prosecutors announced.

Steven Powell, 53, who now lives in Alpharetta, Georgia, pleaded guilty to a single count of health care fraud and will return to New Hampshire on Aug. 30 to be sentenced, according to a statement issued by U.S. Attorney Jane Young, the top federal prosecutor in New Hampshire.