Authorities move to revoke license of doctor linked to overdose deaths

The Osteopathic Medical Board of California has accused Lisa Tseng of Rowland Heights of prescribing unsafe amounts of powerful narcotics to several patients. Since 2007 at least eight of her patients have died from overdoses of the same kind of drugs she prescribed.

Medical authorities have moved to revoke the license of a Rowland Heights physician whose practice was linked in a Times investigation to eight patient overdose deaths.