#United States #Data Breach #Quest Diagnostics #Secaucus #Edelson Lechtzin LLP

Investigation Overview

Edelson Lechtzin LLP, a prominent national class action law firm, has embarked on an investigation following a significant data breach involving Quest Diagnostics, a leading clinical diagnostic laboratory based in Secaucus, New Jersey. The breach has resulted in unauthorized access to sensitive patient information, raising serious concerns about data privacy and security.

What Occurred?

On October 21, 2026, Quest Diagnostics discovered that its Quanum Lab Services Manager (LSM) system was accessed without authorization. This platform is vital as it enables specific clients to place test orders and retrieve test results efficiently. Following the breach, Quest Diagnostics reported the incident to federal law enforcement and engaged third-party cybersecurity experts. A Form 8-K was filed with the U.S. Securities and Exchange Commission on October 22, 2026, openly disclosing the breach and the unauthorized access to patient records.

In the wake of the incident, Quest took immediate actions, including implementing remedial measures and temporarily halting access to the LSM system. However, the firm reassured clients that they could continue to place orders and receive results through alternative means. At this stage, there has been no indication from any threat group claiming responsibility for the breach, nor has Quest Diagnostics confirmed when the unauthorized access began or whether a ransom was demanded.

Nature of Exposed Information

According to Quest Diagnostics, the compromised data may include:

• - Patient records containing protected health information
• - Health and medical records stored in the Quanum platform
• - Associated diagnostic data, test results, and billing information

The company is diligently working to ascertain the exact types and scope of data that were exposed during this breach.

Affected Individuals

Edelson Lechtzin LLP's investigation targets patients who may have had their personal and health information compromised through the Quanum LSM system. Quest Diagnostics asserts that this platform serves about half a million clinicians across numerous locations in North America, but the company has not yet disclosed the total number of affected patients or healthcare customers.

This incident is not the first major data breach affecting Quest Diagnostics; the company faced a similar situation in 2019, when a breach involving a former billing vendor, American Medical Collections Agency (AMCA), compromised the information of approximately 11.9 million patients. However, Quest has noted that the current incident is not anticipated to be on the same scale as the previous breach, considering that only select clients utilized the affected system.

Legal Recourse for Data Breach Victims

Edelson Lechtzin LLP is investigating potential class action claims for those whose data may have been compromised due to the Quest incident. If a class action is successful, it could lead to compensation for victims covering various losses, including lost time, out-of-pocket expenses, and damages related to privacy concerns. The law firm offers evaluations of claims at no cost, making it accessible for affected individuals.

Steps to Ensure Your Security

Those who believe they may be impacted by this data breach are advised to:
1. Remain vigilant for any official notifications from Quest Diagnostics, keeping any accompanying instructions or enrollment codes.
2. Consider placing a free fraud alert or credit freeze with major credit bureaus—Equifax, Experian, and TransUnion—and access your free credit reports at AnnualCreditReport.com.
3. Monitor bank, credit card, insurance statements, and explanations of benefits for any unfamiliar activity, promptly reporting suspicious identity theft to the Federal Trade Commission via IdentityTheft.gov.

Free Case Evaluation

Individuals affected by this breach are encouraged to engage with a data privacy attorney Marc Edelson, Esq., from Edelson Lechtzin LLP. They can confidentially reach out at the law firm’s Newtown, PA office, call at 844-696-7492, or email to request a free consultation.

About Edelson Lechtzin LLP

Edelson Lechtzin LLP specializes in class action litigation and operates from offices in Pennsylvania and California. In addition to data breach cases, the firm deals with securities fraud, antitrust violations, ERISA claims, wage theft, and consumer fraud matters.

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