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Quest Diagnostics documents subpoenaed

This article was originally published in The Gray Sheet

Executive Summary

Quest and its test kit manufacturing subsidiary, Nichols Institute Diagnostics, will supply the U.S. Department of Justice with requested documents related to vitamin D therapies and FDA-cleared tests for measuring parathyroid hormone (PTH) levels. Similar subpoenas were received the week of Oct. 25 by several other dialysis-related product and service providers, including Fresenius Medical. Chronic kidney disease patients often produce dangerous levels of PTH when calcium reabsorption, phosphate excretion and vitamin D production levels are low. Vitamin D analogs, such as Abbott's Zemplar, help regulate PTH. Both Quest and Fresenius maintain that sales of PTH tests and related equipment account for 1% or less of overall revenue...

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