United Sleep Diagnostics Listed by medusa Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
United Sleep Diagnostics was listed by the medusa ransomware group on November 01, 2024 after internal files were exfiltrated in a ransomware attack. The number of individuals affected has not been disclosed; anyone who may have received services from the organization should review their personal information and monitor accounts for unusual activity.
People who have used United Sleep Diagnostics for sleep-disorder testing or treatment may now face uncertainty about whether their personal or medical information was among data claimed to have been taken. Public reporting places the company on a ransomware group's leak site, with a stated volume of 1.20 TB of internal files, yet the number of individuals affected remains unknown and the precise contents of those files have not been confirmed.
That combination of scale and opacity is what makes the incident consequential for ordinary patients and staff: medical and administrative records of this kind can support identity misuse, insurance fraud, or targeted phishing long after the initial event. What follows is limited to the facts that have been reported and to established public background on the actor and sector.
Inside the incident
On 1 November 2024, United Sleep Diagnostics was listed by the Medusa ransomware group. The listing states that internal files were exfiltrated in a ransomware attack and that the total volume of data claimed to have been taken is 1.20 TB. No further technical details—such as the initial access method, the date the intrusion began, or whether systems were encrypted—have been publicly disclosed. The number of people whose information may be involved is listed as unknown.
Because the only public signal is the group's own leak-site claim, independent confirmation of the intrusion, the exact data set, or any ransom demand is not available in the reported facts. The company itself has not, according to the same record, released a detailed public accounting of the event.
Who is medusa?
Medusa is a ransomware operation that has been active for several years and is known for double-extortion tactics: encrypting systems while also copying data and threatening to publish it if a ransom is not paid. The group maintains a public leak site on which it posts victim names, sample files, and countdown timers. Its listings are claims made by the operators themselves; they are not independent forensic findings.
Public reporting on earlier Medusa campaigns shows a pattern of targeting mid-sized organisations across healthcare, manufacturing, and professional services, often after exploiting remote-access tools or unpatched vulnerabilities. No specific statements by Medusa about United Sleep Diagnostics beyond the listing and the 1.20 TB figure appear in the available facts, so any further characterisation of this particular incident would be speculation.
About United Sleep Diagnostics
United Sleep Diagnostics specialises in the monitoring and diagnosis of sleep disorders. Its corporate office is recorded at 3635 Bell Blvd Ste 202, Bayside, New York 11361, and the organisation is listed as having 106 employees. Entities of this type typically collect and store patient demographics, insurance details, clinical sleep-study results, physician notes, and billing records—information that is both sensitive and regulated under U.S. health-privacy rules.
A breach involving a sleep-diagnostics provider therefore carries heightened stakes: the data are medical in nature, often linked to identifiable individuals, and useful to criminals for fraud or social-engineering attacks. The reported employee count and single-office footprint suggest a mid-sized practice rather than a large hospital system, which can mean more limited internal resources for rapid incident response and patient notification.
What was likely exposed
The only data category named in the public record is “internal files exfiltrated in a ransomware attack,” with a claimed volume of 1.20 TB. Exact file types, patient counts, or whether protected health information was included remain undisclosed. Organisations that perform sleep studies customarily hold records that may include names, dates of birth, addresses, Social Security numbers, insurance identifiers, diagnostic reports, and appointment histories. Whether any of those categories were present in the 1.20 TB set has not been confirmed.
Until the company or independent investigators release a verified inventory, the precise exposure stays unconfirmed. Readers should treat any claim of specific data elements as provisional.
What's at stake
For individuals, the practical risks include identity theft, fraudulent insurance claims, and highly targeted phishing that references real medical details. Even partial records can be combined with other breached data sets to create convincing scams. For the organisation, the consequences may include regulatory scrutiny under health-privacy law, notification costs, potential civil claims, and reputational damage that affects patient trust and referral relationships.
Because the number of affected people is unknown and the data types are described only as internal files, the full scope of harm cannot yet be measured. The 1.20 TB figure indicates a substantial volume, but volume alone does not reveal how many unique individuals are involved or how sensitive each file is.
Were you affected?
If you have been a patient, employee, or business partner of United Sleep Diagnostics, treat the listing as a reason for caution rather than confirmed personal exposure. Practical first steps include:
- Monitor bank, credit-card, and insurance statements for unfamiliar activity.
- Place a free fraud alert or credit freeze with the major credit bureaus if you suspect misuse of personal identifiers.
- Be sceptical of unsolicited calls or emails that reference sleep studies or medical bills; verify any request through official channels.
- Request a copy of your medical records from the provider so you know what information they hold about you.
- Run a free exposure scan of your email address against known breach data sets to see whether your credentials or contact details have already appeared elsewhere.
Public detail on this incident remains limited. Any official notification from United Sleep Diagnostics, if and when it arrives, will supersede the group’s unverified claims. Until then, measured vigilance is the most useful response.
AICompiled with AI assistance from public sources and published under our editorial standards.
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Publicly posted by medusa — unverified claim, pending independent verification
Breach listings — particularly those originating from ransomware or leak sites — are third-party claims that may be unverified, incomplete, or inaccurate. A listing does not by itself confirm that a breach occurred or that any specific data was exposed. Severity is an automated assessment, not a definitive rating. Verification status is shown where available.
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