• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
LeadershipTheranos

Theranos Is Now Facing a Class Action Lawsuit Accusing It of Consumer Fraud

Claire Zillman
By
Claire Zillman
Claire Zillman
Editor, Leadership
Down Arrow Button Icon
Claire Zillman
By
Claire Zillman
Claire Zillman
Editor, Leadership
Down Arrow Button Icon
May 26, 2016, 6:22 AM ET
Key Speakers At 2015 The Fortune Global Forum
Photograph by Bloomberg Bloomberg via Getty Images

A common refrain came true again Wednesday: the problems at Theranos have gotten even worse.

The embattled blood-testing startup that’s facing intense regulatory scrutiny is now the subject of a consumer fraud class action lawsuit.

A plaintiff identified only as M.P.B., who’s an Arizona resident, filed the lawsuit in the Northern District of California on Wednesday accusing Theranos of fraud since its proprietary technology—a device advertised as capable of conducting hundreds of blood tests with just a few drops of blood—did not work and produced inaccurate results.

“Theranos assured its customers that these tests were highly accurate, industry leading in quality, and developed and validated under, and compliant with, federal guidelines,” the complaint says. “Thousands of people, including Plaintiff M.P.B., believed the Company’s representations and paid for Theranos’s tests.” Theranos sold its blood tests at Wellness Centers at Walgreens (WAG) Pharmacies.

It became evident that the testing machine, known as Edison, did not work and that Theranos’s tests were not accurate on May 19 when Theranos conceded that it had told regulators that it had voided blood-testing results from Edison, according to the lawsuit. “As a result, tens of thousands of patients may have been given incorrect blood-test results, been subject to unnecessary or potentially harmful treatments, and/or been denied the opportunity to seek treatment for a treatable condition,” it claims. The complaint is seeking damages that include reimbursement of the tests’ purchase price, and it wants Theranos banned from “engaging in further deceptive advertisements.”

Theranos spokeswoman Brooke Buchanan told Fortune that the lawsuit is without merit. “The company will vigorously defend itself against these claims,” she said.

Theranos’s disclosure earlier this month that it had voided two years of results from its Edison blood-testing devices added to the growing consensus that the onetime health technology darling is not all it was cracked up to be. Those allegations began to build in October 2015 when The Wall Street Journal published a damning report that the startup wasn’t actually using its much-touted Edison technology to carry out most of its tests.

Then in March, the Journal reported on findings by the U.S. Centers for Medicare and Medicaid Services (CMS) that a Theranos laboratory in California employed under-qualified personnel and was failing to implement quality safeguards for a number of tests, which posed an “immediate jeopardy” to patient health.

The CMS threatened to revoke the company’s federal license for its California lab and ban CEO Elizabeth Holmes and president Ramesh “Sunny” Balwani, who left the company earlier this month, from the industry for at least two years. Federal prosecutors and the Securities and Exchange Commission are also probing the company, reportedly looking for possible misleading statements to investors or regulators about its technology or operations.

The complaint filed Wednesday claims that “at the very time that Theranos was advertising compliance with federal regulations, it had been repeatedly sanctioned by federal authorities.” The lawsuit says that Theranos performed approximately 6.1 million tests and that there could be thousands of members in its potential class.

This story has been updated to reflect a comment from Theranos.

About the Author
Claire Zillman
By Claire ZillmanEditor, Leadership
LinkedIn iconTwitter icon

Claire Zillman is a senior editor at Fortune, overseeing leadership stories. 

See full bioRight Arrow Button Icon

Latest in Leadership

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
Sections
  • Finance
  • Leadership
  • Success
  • Tech
  • Asia
  • Europe
  • Environment
  • Fortune Crypto
  • Health
  • Retail
  • Lifestyle
  • Politics
  • Newsletters
  • Magazine
  • Features
  • Commentary
  • Mpw
  • CEO Initiative
  • Conferences
  • Personal Finance
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Leadership

C-SuiteLeadership
Trust has become the crisis CEOs can’t ignore at Davos, as new data show 70% of people turning more ‘insular’
By Diane BradyJanuary 20, 2026
13 hours ago
nadella
Big TechDavos
Satya Nadella’s biggest AI bubble warning yet is a challenge to the Fortune 500: It’s time to reinvent the knowledge worker
By Jake AngeloJanuary 20, 2026
15 hours ago
C-SuiteNext to Lead
What Walmart’s CEO succession reveals about the smartest time to exit
By Ruth UmohJanuary 20, 2026
15 hours ago
Image of various nation's flags over the World Economic Forum sign in Davos.
NewslettersEye on AI
At Davos, AI hype gives way to focus on ROI
By Jeremy KahnJanuary 20, 2026
16 hours ago
ICE
PoliticsImmigration
How you, the American taxpayer, funded an army-scale supersizing of ICE: ‘Trump is militarizing immigration enforcement’
By Lisa Mascaro and The Associated PressJanuary 20, 2026
16 hours ago
Marc Andreessen
SuccessProductivity
Billionaire Marc Andreessen spends 3 hours a day listening to podcasts and audiobooks—that’s nearly an entire 24-hour day each week
By Preston ForeJanuary 20, 2026
17 hours ago

Most Popular

placeholder alt text
AI
Elon Musk says that in 10 to 20 years, work will be optional and money will be irrelevant thanks to AI and robotics
By Sasha RogelbergJanuary 19, 2026
2 days ago
placeholder alt text
Personal Finance
Current price of silver as of Tuesday, January 20, 2026
By Joseph HostetlerJanuary 20, 2026
20 hours ago
placeholder alt text
Politics
The U.S. Supreme Court could throw a wrench into Trump’s plan to take Greenland as soon as Tuesday
By Jim EdwardsJanuary 19, 2026
2 days ago
placeholder alt text
Success
Half of veterans leave their first post-military jobs in less than a year, and spouses face sky-high unemployment—this CEO has a $500 million fix
By Emma BurleighJanuary 19, 2026
2 days ago
placeholder alt text
Success
Billionaire Marc Andreessen spends 3 hours a day listening to podcasts and audiobooks—that’s nearly an entire 24-hour day each week
By Preston ForeJanuary 20, 2026
17 hours ago
placeholder alt text
Economy
Trump added $2.25 trillion to the national debt in his first year back in charge, watchdog says
By Nick LichtenbergJanuary 20, 2026
12 hours ago

© 2025 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.