New York, NY -- (SBWIRE) -- 02/25/2013 -- WebMD Health Corp. (NASDAQ:WBMD) saw shares advancing 25.40% or $4.14 per share to close at $20.44 on volume of 4,132,938 shares traded during Friday's trading session. Shares of WebMD Health Corp. surged Friday after the health information company reported better-than-expected revenue in the fourth quarter and forecast a smaller sales decline in 2013.