Theranos withdraws two years' worth of Edison blood-test results: WSJ
Theranos has withdrawn the results of all blood tests run on its Edison device in 2014 and 2015, The Wall Street Journal reported Wednesday, citing a person familiar with the matter.

According to the report, Theranos has informed the Centers for Medicare and Medicaid Services of its decision to issue corrected blood-test reports to doctors and patients, canceling the results in some cases and revising others.

Theranos' reputation has been based on providing fast, accurate and affordable blood testing, using its Edison machine, which employs smaller needles and tubes than traditional blood-testing devices.

But the company, valued at more than $9 billion, has come under scrutiny after media reports questioned the accuracy of the proprietary test methods.