Articles by John Carreyrou

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  Craving More Growth, Walgreens Dismissed Its Theranos Doubts

  May 25, 2016 04:14 p.m.

  The drugstore chain made a blood-testing deal without fully validating the startup’s technology, worrying that Elizabeth Holmes might balk if Walgreens pushed too hard.

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  Theranos Voids Two Years of Edison Blood-Test Results

  May 18, 2016 08:16 p.m.

  Company led by Elizabeth Holmes has told regulators that all Edison results from 2014 and 2015 were canceled. Theranos has issued tens of thousands of corrected blood-test reports to patients and doctors.

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  Theranos President Sunny Balwani to Depart

  May 12, 2016 10:17 a.m.

  Sunny Balwani, a top executive who helped build Theranos into a major blood-testing laboratory, is leaving the company amid regulatory probes of the embattled Silicon Valley firm.

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  Regulators Release Lightly Redacted Theranos Letter, Inspection Report

  April 25, 2016 08:50 p.m.

  U.S. health regulators released a lightly redacted copy of the 45-page letter they sent Theranos last month proposing sanctions against the blood-testing company, as well as a new, lightly redacted copy of the inspection report detailing deficiencies they said that they found at its Newark, Calif., lab.

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  Theranos Is Subject of Criminal Probe by U.S.

  April 18, 2016 06:37 p.m.

  Federal prosecutors are investigating whether the blood-testing company misled investors about the state of its technology and operations.

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  U.S. Proposes Banning Theranos Founder

  April 13, 2016 02:07 p.m.

  Theranos hopes to avoid sanctions, but CEO Elizabeth Holmes and No. 2 executive at the startup could be forced out of the blood-testing industry for at least two years for failing to fix problems.

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  Theranos Devices Often Failed Firm’s Accuracy Checks

  March 31, 2016 07:06 p.m.

  A government report details deficiencies found with Theranos’s Edison blood-testing machines.

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  Theranos Results Could Throw Off Medical Decisions, Study Finds

  March 28, 2016 04:45 p.m.

  A study published Monday showed that Theranos’s results for total cholesterol were lower by an average of 9.3% than those from Quest and LabCorp.

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  Theranos Ran Tests Despite Quality Problems

  March 8, 2016 06:53 a.m.

  A federal inspection report said a Theranos laboratory ran an important blood test on 81 patients in a six-month period despite erratic results from quality-control checks meant to ensure the test’s accuracy.

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  Cancer-Care Giant Settles Radiation-Therapy Allegations

  March 2, 2016 06:35 p.m.

  Cancer-care giant 21st Century Oncology agreed to pay $35 million to settle civil allegations that it billed Medicare for an unnecessary radiation procedure, according to a person familiar with the matter.

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  Walgreens Threatens to End Theranos Agreement

  February 10, 2016 09:08 p.m.

  The blood-testing firm got a 30-day deadline from Walgreens to resolve major infractions that violate the federal law governing clinical laboratories.

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  Theranos Stops Patient Blood Draws at Capital BlueCross Pennsylvania Store

  January 29, 2016 06:25 p.m.

  Health insurer Capital BlueCross has asked Theranos to stop drawing blood from patients at its retail store in Enola, Penn., following federal health inspectors’ findings of deficiencies at the blood tester’s California laboratory.

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  Walgreens Pulls Back From Theranos

  January 28, 2016 07:53 p.m.

  Theranos’s main retail partner, Walgreens, is suspending some ties to the blood-testing laboratory in the wake of a critical regulatory inspection report.

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  Theranos Lab Practices Said to Pose Risk to Patient Health

  January 27, 2016 08:59 p.m.

  Regulators have found serious deficiencies at Theranos’s laboratory in Northern California that could put the facility at risk of losing its certification.

  • Regulator’s Letter to Theranos

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  Deficiencies Found at Theranos Lab

  January 24, 2016 08:19 p.m.

  U.S. health inspectors have found serious deficiencies at Theranos’s laboratory in Northern California, and failing to fix them could put the lab at risk of suspension from the Medicare program.

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  21st Century Oncology Withdraws IPO

  January 5, 2016 05:44 p.m.

  21st Century Oncology Holdings Inc., the cancer-care giant that was recently embroiled in a Medicare billing investigation, on Tuesday withdrew its long-delayed initial public offering.

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  At Theranos, Strategies and Snags

  December 27, 2015 06:40 p.m.

  At Theranos, the blood-testing ambition of founder Elizabeth Holmes has long collided with technological problems, according to former employees of the Silicon Valley startup, company emails and complaints filed with federal regulators.

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  U.S. Probes Theranos Complaints

  December 20, 2015 08:58 p.m.

  U.S. health regulators are investigating complaints about laboratory and research practices at Theranos by two former employees of the blood-testing startup company.

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  Cancer-Care Giant to Pay $19.75 Million to Settle Medicare Billing Probe

  December 17, 2015 10:06 p.m.

  Cancer-care giant 21st Century Oncology agreed to pay $19.75 million to settle civil allegations by the Justice Department that its doctors performed a bladder-cancer test on Medicare patients more often than medically necessary, according to people close to the investigation.

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  Safeway, Theranos Split After $350 Million Deal

  November 10, 2015 08:36 p.m.

  Safeway and blood-test startup Theranos are negotiating to dissolve their partnership after a $350 million deal to build blood-testing clinics fizzled. The grocery chain built more than 800 clinics but never offered blood tests.