CareDx

The broader market drove down the stock prices of many diagnostics companies. Natera, Guardant Health, and CareDx paced the gainers.

The company reported $26 million in total revenues for the quarter and said that testing services revenues more than doubled year over year.

The diagnostic will now be a contracted service with Anthem Blue Cross of California and 10 of its affiliated health plans.

The companies will commercialize Predigraft, a data analysis tool that provides early predictions of risk for allograft rejection and transplant loss.

Overall, the share prices for 18 of the index's 27 companies fell month over month. Exact Sciences was the only firm whose share price improved in the double digits.

The acquisition of OTTR Complete Transplant Management will enable CareDx to integrate the EMRs of patients at transplant centers with longitudinal patient surveillance data.

The company filed its first suit against Natera in March, claiming the firm's kidney transplant test infringes patents underlying CareDx's AlloSure test.

CareDx claims that Natera is infringing on two of its patents related to non-invasive monitoring of organ transplant rejection through cell-free DNA analysis.

The company said its testing services revenues for the quarter rose nearly 120 percent year over year.