Trigon Healthcare

(TGH) - Get Report

named John W. Coyle chief operating officer and president, a post that has been vacant since April 1999.

Chairman and Chief Executive Tom Snead previously served in the position. Coyle joins the company from

Aetna

(AET)

, where he was the head of business operations. From 1989 to 1992, he served as Aetna's vice president for HMO and managed care operations in the mid-Atlantic region.

Shares of Trigon fell $4.19, or 6.5%, to $59.88 in recent

New York Stock Exchange

trading.