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high severity July 23, 2025 · 3 min read Unverified claim — what this is

Sanderling Healthcare Listed by sarcoma Ransomware Group

If you were named in this filing, here’s what is being claimed, and what it would mean for you.

Sanderling Healthcare Sanderling Healthcare was founded in 2009 by Dr. Jerome S. Tannenbaum to further one of his personal missions for healthcare – to lower the cost, and speed the construction, of healthcare facilities. As a nephrologist and successful entrepreneur, Dr. Tannenbaum had spent years perfecting his dialysis clinic designs. Known for counting every step made by his nurses and patient care technicians, and having developed roughly 100 dialysis clinics across the country, Dr. Tannenbaum perfected the design of the modern day dialysis clinic. Among the many benefits of working with

— from Sarcoma’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.
Sanderling Healthcare Listed by sarcoma Ransomware Group

On July 23, 2025, Sanderling Healthcare appeared on the leak site of the sarcoma ransomware group after the attackers exfiltrated internal files during a ransomware incident. The breach affects anyone whose personal or medical records were stored in the company’s systems, including patients, employees, and their family members whose information may have been included in shared documents.

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What's Publicly Reported from Reporting

Public reporting indicates that sarcoma listed Sanderling Healthcare on its data leak portal on July 23, 2025. The company, founded in 2009 by Dr. Jerome S. Tannenbaum, specializes in the design and construction of dialysis clinics. Available reporting describes the exposed material as internal files exfiltrated during a ransomware attack. The exact number of individuals affected remains unknown, and the specific types of data contained in the files have not been publicly detailed beyond the broad category of internal company documents.

Why This Matters for You and Your Family

When a healthcare provider’s internal files are stolen, the information often includes names, addresses, dates of birth, Social Security numbers, insurance details, and medical histories. If your family has ever received care at a Sanderling-related facility or if your employer’s records touched their systems, your data may now be in the hands of criminals. Medical and financial records are especially dangerous because they allow identity thieves to open accounts, file false tax returns, or commit insurance fraud in your name. Children’s information is frequently swept up in these incidents through guardian forms or family insurance files, giving attackers long-term leverage.

The Doxxing and Identity-Chain Risks

Stolen internal files rarely stay isolated. Attackers routinely cross-reference exposed emails, usernames, and phone numbers against data from previous breaches. This creates an identity chain that can link your work email to personal accounts, social media handles, and even your children’s gaming profiles. Once the chain is built, doxxing escalates quickly: harassers can publish home addresses, phone numbers, and family relationships. Credential leaks like this one regularly cascade into account takeovers on gaming platforms, where children’s usernames and reused passwords become entry points for further harassment or extortion.

What to Do

  • Run a DoxxScan to map every link between your emails, phone numbers, usernames, and real-world identity so you can see the exposure chains before criminals exploit them.
  • Rotate any password you used at Sanderling Healthcare or any related service, then enable two-factor authentication through an authenticator app on every account where that password was reused.
  • Enable continuous DoxxScan monitoring across 13.1 billion+ breach records and more than 100 platforms so the next time your information surfaces you learn within hours rather than months.
  • Cover your entire household with DoxxScan family protection, which extends to dependents and children’s gaming accounts that often chain back to the same addresses and family documents.
  • Let remediation specialists handle takedown requests across data brokers and leak sites while you focus on securing your own accounts.

The sarcoma group’s appearance on the scene does not mean the risk disappears once the initial leak window closes. Data sold or shared in these incidents can circulate for years. Starting with a clear map of your exposure and putting continuous safeguards in place gives you and your family the best chance of staying ahead of both opportunistic thieves and determined doxxers. DoxxScan by GalaxyWarden delivers that combination of continuous monitoring across 13.1B+ breach records and 100+ platforms, AI-powered identity-chain mapping, hands-on remediation by specialists, and full household coverage including children’s gaming accounts.

What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo
value redacted in this samplephone, household, property recordsBeenVerified
value redacted in this sample582 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach
unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

Check your exposure
Sanderling Healthcare is one listing. Your email is probably in others.
We can’t confirm any single incident against the sources we search, so we won’t pretend to. What we can show you is your own exposure — your email against 13.1B+ leaked records and the sites that publish your address. About 15 seconds. No account, no card.

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Report details & sourcing

Severity High the filing does not enumerate what was exposed
Disclosed July 23, 2025
Last reviewed August 8, 2026
Affected Unconfirmed
Unverified claim — what this report is
This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.
Editorial & sourcing policy
GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.
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