Quest Diagnostics is closing a lab in Pennsylvania and laying off 121 employees at the site, ... Kansas, that tests urine, hair and oral fluid specimens, according to a statement from the company.

Quest's analysis of lab data also found that the drug positivity rate for the overall U.S. workforce remained at a record high of 4.6%, up from a low of 3.5% between 2010 and 2012.

A Pennsylvania laboratory overcharged New Jersey's Medicaid program by millions of dollars, including more than $1,000 to test urine for drugs, a test that it had charged others as little as $2.38 ...