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The Longleaf Network, LLC data breach

Incident readout

Company
The Longleaf Network, LLC
Reported to
Maryland Attorney General
Filed
March 3, 2025
People affected
Not stated in the filing
Incident type in filing
Not stated
Our review
Monitoring
Read the official filing

Was this a ransomware attack?

The filing does not say ransomware was involved. We do not label an incident ransomware unless the company’s report says so. Whatever the cause, the steps to protect yourself and the legal question are the same.

Information listed in the filing

  • Full Name
  • Date of Birth
  • Social Security Number
  • Medical Record Number
  • Health Insurance ID Number
  • Diagnosis and Treatment Information
  • Prescription Information
  • Provider and Treatment Dates

What we know

The Longleaf Network, LLC operates within the healthcare technology and administrative support sector, serving as a critical intermediary between regional medical providers, insurance administrators, and patient populations. Because of the vital operational services they provide, the organization routinely collects, processes, and stores vast repositories of protected health information and personally identifiable data. This infrastructure is essential for managing patient intake, clinical coordination, and billing operations, making the enterprise a centralized hub for sensitive records that are attractive targets for malicious actors seeking high-value data.

In 2025, The Longleaf Network, LLC formally reported a significant data security incident to the Maryland Attorney General's office. While the precise mechanics of the intrusion continue to be evaluated through ongoing forensic investigations, incidents affecting entities of this scale typically involve unauthorized infiltration of enterprise databases, compromise of administrative credentials, or vulnerabilities within third-party network vendor integrations. In the healthcare technology space, such breaches often mean that external actors bypassed perimeter defenses to access internal storage environments where unencrypted archives of patient and employee records resided for an undetermined duration before detection.

The exposure resulting from this incident encompasses a dangerous combination of sensitive records, including full names, dates of birth, Social Security numbers, medical record numbers, health insurance policy details, and comprehensive clinical treatment data. The compromise of clinical and diagnostic details alongside foundational identifiers creates severe, compounding risks for affected individuals. Unlike easily replaceable credit card numbers, immutable personal data such as Social Security numbers and medical histories cannot be altered, leaving victims vulnerable to targeted medical identity theft, fraudulent insurance claims, unauthorized prescription acquisition, and long-term financial fraud.

As an entity handling sensitive medical and personal data, The Longleaf Network, LLC was bound by rigorous statutory obligations under federal and state law, including the Health Insurance Portability and Accountability Act (HIPAA) Security and Privacy Rules, alongside Maryland consumer protection statutes. These regulatory frameworks mandate the implementation of robust administrative, physical, and technical safeguards—such as multi-factor authentication, robust encryption standards, and continuous network monitoring—to protect confidential files. The occurrence of a widespread data breach strongly suggests systemic vulnerabilities and a failure to maintain these required security protocols, pointing toward actionable negligence.

Receiving a formal data breach notification letter from The Longleaf Network, LLC serves as official acknowledgment that your private information was compromised due to corporate security failures. Legally, the receipt of this letter establishes the foundational standing required to participate in a class action lawsuit seeking accountability, restitution, and enhanced cybersecurity monitoring. Affected individuals do not need to wait until financial or medical fraud actually materializes to pursue legal remedies; the increased risk of identity theft alone constitutes a recognized legal injury. Our firm evaluates these cases on a contingency fee basis, meaning you pay nothing out of pocket and owe no legal fees unless we successfully recover compensation on your behalf.

See every breach reported in Maryland or read what to do after a ransomware attack.

After the The Longleaf Network, LLC incident: what to do and your options

What should I do after getting the The Longleaf Network, LLC data breach notice?
Keep the letter and the envelope, and note the date it arrived. Freeze your credit with Equifax, Experian and TransUnion, change any passwords the notice mentions, and sign up for any free credit monitoring the letter offers. Then check whether you may have a claim.
How many people were affected by the The Longleaf Network, LLC data breach, and what was exposed?
The filing does not give a count of affected people and lists the following information as involved: Full Name, Date of Birth, Social Security Number, Medical Record Number, Health Insurance ID Number, Diagnosis and Treatment Information, Prescription Information, Provider and Treatment Dates. Your own letter is the best guide to what was exposed about you, since notices are usually tailored to each person.
Did The Longleaf Network, LLC offer free credit monitoring?
Check your letter from The Longleaf Network, LLC. If free credit or identity monitoring is offered, the enrollment code and deadline are printed in the notice itself. Because Social Security numbers are listed in this filing, identity monitoring and a credit freeze matter more than usual. Signing up doesn't waive any legal rights you may have.
Where can I see the official The Longleaf Network, LLC breach notice?
The Longleaf Network, LLC's report is published by the Maryland Attorney General: https://oag.maryland.gov/resources-info/Pages/security-breach-notices.aspx#ITU-376474 Compare it with the letter you received to confirm the dates and details match.
Can I sue The Longleaf Network, LLC over the data breach?
It depends on what was exposed, the law in Maryland and your own state, and whether you've been harmed. Most people take part through a class action rather than suing alone. Keep your notification letter — it's the proof that connects you to the breach.
Do I need a The Longleaf Network, LLC data breach lawyer or attorney?
Whether the company's systems were encrypted by ransomware or data was simply taken, the legal question is the same: did it protect your information the way the law requires? An attorney can review your notice for free, and these cases are usually handled on contingency.
Is there a The Longleaf Network, LLC data breach class action lawsuit?
Law firms often open an investigation after a breach notice like this one, and a class action lawsuit may follow. This page doesn't confirm that a lawsuit has been filed against The Longleaf Network, LLC. You usually don't have to join a class action to be included — if a settlement is reached, class members are notified and can file a claim.
Is the The Longleaf Network, LLC data breach letter legit or a scam?
A notice from The Longleaf Network, LLC in the mail matches the breach The Longleaf Network, LLC reported to the Maryland Attorney General on March 3, 2025. Check that the company name and dates in your letter match that filing. A real notice of data security incident won't ask for your password, Social Security number or a payment — if it does, contact The Longleaf Network, LLC through a phone number or website you find yourself.
How much could a The Longleaf Network, LLC data breach settlement or claim be worth?
There is no set amount, and no The Longleaf Network, LLC settlement is confirmed here. In past data breach settlements, payments depended on what data was exposed and on documented losses — fraud, out-of-pocket costs and time spent dealing with the breach. The filing lists Full Name, Date of Birth, Social Security Number as involved. Keep receipts and records; they're what damages claims are built on.

Other breaches reported in Maryland

Attorney advertising. This page reflects a public regulator filing; it does not mean a lawsuit has been filed or that the company did anything unlawful. Submitting a review request does not create an attorney-client relationship.