Two dialysis service companies -- Renal Care Group, Nashville, and DaVita, El Segundo, Calif. -- announced that they have been served subpoenas by the U.S. Justice Department. The companies said the subpoenas seek information related to testing for parathyroid hormone levels and vitamin D therapies. The parathyroid hormone and vitamin D help regulate calcium levels. Both companies said they would address the subpoenas during conference calls Wednesday. In its news release disclosing the subpoeana, DaVita said no charges have been filed. -- by Joseph Mantone
Justice Department subpoenas dialysis companies
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