McKesson HBOC

(MCK) - Get Report

named John Hammergren as president and chief executive and set plans to restructure its online unit.

The company has altered its Internet venture, iMcKesson. The physician offerings and transaction hub will become part of McKesson's health care information technology business. The medical management portion will continue as a standalone unit.

Hammergren will take over as president and chief executive on April 1. He will replace David Mahoney, who is leaving McKesson. Both Hammergren and Mahoney served as co-chief executives of the health care supply management and information technology company during the past 18 months.

McKesson, which is based in San Francisco, gained 61 cents, or 1.9%, to $32.07 in recent trading on the

New York Stock Exchange

.

The company is reviewing its operations, cost structure and asset values, along with expenses that may be incurred during the process of reorganizing iMcKesson. The company will record a charge in the fourth fiscal quarter ending March 31 to cover asset revaluations and restructuring costs.