One-time laboratory CEO Christopher Grottenthaler, formerly of Frisco, Texas, has agreed to pay $4.25 million to resolve False Claims Act litigation with the United States alleging illegal payments to doctors for laboratory referrals in violation of the Anti-Kickback Statute. Two physicians — Hong Davis, M.D., of Plano, Texas, and Elizabeth Seymour, M.D., of Denton, Texas — and
