Nearly 12 million customers affected by data breach, Quest Diagnostics says

istock_060319_questdiagnosticsdata

PredragImages/iStock (FILE photo)(NEW YORK) — Nearly 12 million customers of one of the nation’s biggest blood testing providers may have had their personal information compromised in a cyberattack, Quest Diagnostics officials said Monday in a regulatory filing.

A billing collections vendor notified Quest Diagnostics of the discovery of “unauthorized activity” on its online payment page.

According to a Securities and Exchange Commission filing known as an 8-K, the vendor, American Medical Collection Agency, told Quest that hackers had access to its system from August 1, 2018 to March 20, 2019.

In that time, credit card numbers, bank account information, medical information and other personal data of 11.9 million people was potentially exposed.

AMCA officials said they notified law enforcement of the breach.

“Quest Diagnostics takes this matter very seriously and is committed to the privacy and security of patients’ personal, medical and financial information,” Quest representatives said in its filing.

Quest is one of the world’s leading medical diagnostic companies, with 2018 revenues of $7.5 billion. Headquartered in Secaucus, N.J., it has 45,000 employees worldwide.

Copyright © 2019, ABC Radio. All rights reserved.

imgi_27_655518147_1267303252167954_4010646149542605187_n

May Market 2026

Join us for the Annual Holidays in the Pines, an enchanting indoor marketplace showcasing the finest local crafters, artists, and flower farmers. Discover a diverse array of handcrafted treasures including plant starts, soothing lavender products, artisanal soaps,

getty_shopping_0430265399

US economy grows at solid pace to start 2026

People walk along Broadway with shopping bags in Manhattan on February 27, 2026 in New York City. (Spencer Platt/Getty Images) (NEW YORK) — The United States economy grew at a solid pace over the first three months

untitled20design20283829733504

Fed expected to hold interest rates steady

Federal Reserve Chair Jerome Powell speaks during a press conference following the Federal Open Markets Committee meeting at the Federal Reserve on December 10, 2025 in Washington, DC. (Photo by Chip Somodevilla/Getty Images) (NEW YORK) — The

g_gaspump_042826449185

US gasoline prices hit highest level in 4 years

A gas pump stands at a station in Manhattan on April 21, 2026 in New York City. (Spencer Platt/Getty Images) (NEW YORK) — Gasoline prices in the United States hit their highest level in four years on