Quest Diagnostics lawsuit: what it claims and who could get paid

What happened at Quest Diagnostics

Quest says it learned on Oct. 21, 2026 of unauthorized access to its Quanum Lab Services Manager, a system healthcare providers use to order lab tests and see results. It disclosed the incident in an SEC filing on Oct. 22, 2026. Quest says it paused access to the system, brought in outside cybersecurity experts and notified federal law enforcement.

Quest has confirmed only that personal information and patient records were involved. It has not listed the types of data or said how many people are affected. It also says it temporarily paused two other tools as a precaution, but that no data was accessed in them. This is separate from older Quest lawsuits over billing and retirement plans.

What the Quest Diagnostics lawsuit claims

Johnson v. Quest Diagnostics Inc., No. 2:26-cv-13795, was filed Oct. 22, 2026 in the U.S. District Court for the District of New Jersey by three customers from South Carolina, Florida and California. It claims negligence, breach of implied contract and a declaratory judgment. The plaintiffs say Quest failed to adequately protect patient information, and point to a 2021 ransomware attack on its subsidiary ReproSource Fertility Diagnostics, which affected about 350,000 patients, as a prior warning.

Plaintiffs allege, without Quest's confirmation, that the data includes names, dates of birth, contact details, insurance information and lab results. Some other suits allege Social Security numbers were taken, which is unproven. None of this has been proven in court.

Who is in the proposed class

Johnson proposes a class of all individuals in the U.S. whose private information Quest maintained and that was accessed or compromised in the breach. A judge has not approved any class, and the class period is not announced. One of the other suits proposes a Colorado subclass.

In practice, the people who could be covered are patients whose lab data sat in the Quanum system. The best clue is a notice letter from Quest, which it says it will send once its investigation is complete. Until then, no one can claim money, and any message offering to file a Quest claim is not legitimate. Our guide to spotting settlement scams explains the red flags.

Where the cases stand

Within days, plaintiffs filed at least seven proposed class actions in New Jersey. These are the ones reported by Top Class Actions and OpenClassActions. A judge has not been identified in our sources, and we found no consolidation order. Quest has not announced credit monitoring, though it says notices will describe resources such as credit and identity monitoring.

Court records are the final word, and we relied on news and case trackers because the docket site refused automated access. Dates and case counts may have moved since.

What could happen next

With many near-identical suits, expect the court to consolidate them and pick lead lawyers. Quest will then probably ask to dismiss, arguing the plaintiffs can't show real harm. If the cases survive, a settlement is the most common outcome in data breach cases, often within a year or two. Typical payouts combine a cash payment and credit monitoring, sometimes with reimbursement for documented losses. Nothing like that is announced here.

Read how a class action works and what happens after certification for the timeline, or see data breach settlements open now for claims you can file today.

What to do now and how to get notified

Watch your mail and email for a breach notice from Quest, and be careful with unexpected links. Consider checking your credit reports and reviewing insurance statements for services you don't recognize. Read how to get notified of class action settlements. Owed finds settlements you may qualify for as they open, explains them in plain English, opens the official claim form and reminds you before deadlines, but you always submit the claim yourself. Owed Pro is $2 for the first week, then $49 per year — one flat membership. Owed never takes a percentage of any payout. Filing directly with an administrator is free. Browse the settlements directory for claims open today.

This guide is general information, not legal advice. Courts decide who is in a class and what anyone is paid.

Glossary

Quanum Lab Services Manager

The Quest system healthcare providers use to order lab tests and view results, where the unauthorized access happened.

Proposed class action

A lawsuit filed for a large group before a judge has agreed the group can proceed together.

Negligence

A claim that a company failed to take reasonable care, here to protect patient data.

Consolidation

Combining overlapping cases so one judge handles them together.

Declaratory judgment

A court ruling that declares the parties' legal rights, without necessarily awarding money.

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