Onsite Mammography Data Breach Settlement: Claims Open
At a glance
- Status
- Closing soon
- Defendant
- Onsite Mammography, LLC d/b/a Onsite Women's Health
- Settlement fund
- $2,525,000
- Claim deadline
- August 11, 2026
- No-proof cash option
- Yes — pro rata cash payment (amount varies with number of claims filed), no documentation required, or up to up to $5,000.00 in documented, unreimbursed out-of-pocket losses
- Max documented payout
- $5,000
- Administrator
- Eisner Advisory Group LLC
- Official site
- www.onsitesettlement.com
- Court
- United States District Court, District of Massachusetts
- Case number
- 3:25-CV-11123-MGM, No. 3:25-CV-11123-MGM
Last verified July 16, 2026
Key dates
| Milestone | Date | What it means |
|---|---|---|
| Claim deadline | August 11, 2026 | Last day to file for a payment |
| Opt-out (exclusion) deadline | July 13, 2026(passed) | Last day to leave the settlement and keep the right to sue |
| Objection deadline | None listed | Last day to object to the terms |
| Final approval hearing | September 9, 2026 | When the judge decides whether to approve the settlement |
| Expected payout | Not yet scheduled | Payments are not sent until after final approval and any appeals |
Where to file
Onsite Mammography Data Breach Settlement (Clarkson v. Onsite Mammography) is administered by Eisner Advisory Group LLC. The only place to file is the official settlement website:
File at the official sitewww.onsitesettlement.com
Filing is free. No legitimate settlement charges a fee to file a claim.
You cannot file on RecordingLaw.com. We are an independent publisher, not the settlement administrator, and we are not affiliated with any court, agency, or defendant.
The Onsite Mammography data breach settlement (Clarkson v. Onsite Mammography) is open, and the window to file is closing soon. As of July 2026, the deadline to submit a claim is August 11, 2026, about four weeks away.
If you received a notice that your information may have been involved in the October 2024 breach at Onsite Mammography, LLC, doing business as Onsite Women's Health, you may be part of the settlement class. Below is what actually happened, what people can realistically expect to receive, and what to do if you have not filed yet.
What happened
Onsite Mammography, LLC, which operates as Onsite Women's Health, provides mobile mammography and imaging services to patients and healthcare facilities. In October 2024, the company discovered that an unauthorized third party had accessed one employee's email account.
The account was compromised through a phishing email, a message designed to trick an employee into handing over login credentials. A forensic review determined that patients' private information, potentially including protected health information, may have been exposed as a result.
The resulting lawsuit, Clarkson v. Onsite Mammography, LLC, was filed in the U.S. District Court for the District of Massachusetts, case number 3:25-CV-11123-MGM. That case led to the settlement now open for claims.
Where things stand right now
As of July 2026, this settlement is open and accepting claims, with a deadline of August 11, 2026.
The window to exclude yourself from the class, known as opting out, and the window to object to the settlement's terms both closed on July 13, 2026. Opting out means leaving the class to keep your own right to sue Onsite separately, but it also means giving up any payment from this fund. Objecting means staying in the class while telling the court you think the deal is unfair. Both options are gone now; filing a claim is the only step still available.
The court has already given preliminary approval to the settlement, which is why the claims process is open now. A Final Approval Hearing is scheduled for September 9, 2026, at 12:00 p.m. ET, where the judge will decide whether to grant final approval. No payment date has been set, and none will exist until after that hearing.
Who's in the class
You may be part of the settlement class if Onsite Women's Health notified you that your information was involved in the October 2024 breach. The class covers an estimated 357,265 patients across the United States whose private information, potentially including protected health information, may have been accessed.
If you are unsure whether you received a notice, check the official settlement site directly rather than a search result or an unexpected text message.
How much people can realistically get
The settlement gives class members two main cash options, plus a separate monitoring benefit.
The first option requires no documentation: a pro rata cash payment. Pro rata means the dollar amount is not fixed. It depends on how many people file valid claims and what the court approves for fees and costs, so nobody can promise a number in advance.
The second option is reimbursement for documented, unreimbursed out-of-pocket losses tied to the breach, capped at up to $5,000. According to the official settlement FAQ, eligible costs can include things like credit report or credit-freeze fees, notary charges, postage, copying, mileage, and phone charges incurred on or after October 2024. That $5,000 figure is a ceiling, not a typical payout. Most documented-loss claims will be far smaller, and every dollar figure here is still subject to pro-rata adjustment.
Separately from either cash option, class members may also elect Credit and Medical/Healthcare Data Monitoring and Insurance Services. According to the official settlement site, this benefit runs for three years, includes monitoring at all three credit bureaus plus healthcare data monitoring, and comes with $1 million in identity theft insurance, all at no cost to class members.
What proof you need
The no-documentation cash payment needs nothing beyond a completed claim form. You do not need receipts to choose that option.
The documented-loss reimbursement, up to $5,000, needs records connecting your claimed loss to this breach: receipts, statements, or similar proof of an actual, unreimbursed cost incurred on or after October 2024.
The monitoring and insurance benefit does not require proof of a loss either. It is an election you make on the claim form.
How to file
Filing runs entirely through the official settlement site for this case. The claim form asks you to identify yourself, confirm you received notice, and choose which benefits you want: the no-proof cash payment, the documented-loss reimbursement, the monitoring benefit, or a combination where the settlement allows it. The deadline to submit is August 11, 2026.
Protect yourself now: freeze your credit first
Whether or not you file a claim, the most useful free step after a breach like this is a credit freeze at all three major bureaus: Equifax, Experian, and TransUnion. A freeze blocks new credit from being opened in your name, and by federal law, placing, lifting, and removing one is free and does not affect your credit score. Our guide to freezing your credit after a data breach walks through the steps at each bureau.
If you elect the settlement's three-year credit and medical data monitoring benefit, treat it as a second layer on top of a freeze, not a replacement for one. Monitoring tells you after something has already happened; a freeze helps stop it from happening in the first place.
If you already see signs of misuse, such as accounts you do not recognize or unfamiliar hard inquiries, IdentityTheft.gov, the FTC's free recovery site, builds a personalized recovery plan at no cost.
More open and closed settlements
If Onsite Mammography is not the only breach notice you have received, our data breach settlement tracker lists the settlements we have verified, open and closed.
Frequently asked questions
Frequently Asked Questions
Is the Onsite Mammography data breach settlement still accepting claims?
Yes. As of July 2026, the Onsite Mammography data breach settlement is open, and the deadline to file a claim is August 11, 2026.
What caused the Onsite Mammography data breach?
An unauthorized third party accessed an Onsite Women's Health employee's email account through a phishing email in October 2024, and the Onsite Mammography data breach settlement resolves claims that patients' private information, potentially including protected health information, was exposed as a result.
Who is included in the Onsite Mammography settlement class?
You may be part of the Onsite Mammography settlement class if Onsite Women's Health notified you that your information was involved in the October 2024 breach; the class covers an estimated 357,265 patients.
How much does the Onsite Mammography settlement pay?
The Onsite Mammography settlement offers a pro rata cash payment with no documentation, or reimbursement of up to $5,000 for documented, unreimbursed out-of-pocket losses; amounts are estimates subject to pro-rata adjustment, and most documented claims will be well below the $5,000 cap.
Does the Onsite Mammography settlement include credit monitoring?
Yes. According to the official settlement site, the Onsite Mammography settlement lets class members elect three years of credit and medical/healthcare data monitoring with $1 million in identity theft insurance, at no cost.
Can I still opt out of or object to the Onsite Mammography settlement?
No. The deadline to exclude yourself from the Onsite Mammography settlement class or to object to its terms was July 13, 2026, and both have passed; filing a claim by August 11, 2026 is the only step still available.
Has the Onsite Mammography settlement received final approval?
Not yet, as of July 2026. The Final Approval Hearing for the Onsite Mammography settlement is scheduled for September 9, 2026, and no payment date has been set.
What proof do I need to file an Onsite Mammography settlement claim?
None, if you choose the Onsite Mammography settlement's pro rata cash payment. The documented-loss option, capped at up to $5,000, requires records showing an actual, unreimbursed cost connected to the breach.
What should I do if I am not sure whether I got a notice about the Onsite Mammography breach?
Check the official Onsite Mammography settlement site directly rather than a search result or unexpected text message, and regardless of your claim status, place a free credit freeze at Equifax, Experian, and TransUnion.
How to tell a settlement notice is real
Check the case name, case number, and court against the official settlement site. Go to that site directly instead of clicking a link in an email or text. Nobody legitimate will call, text, or email out of the blue asking for your Social Security number, bank account, or card details, and nobody will charge you to file. Report anyone who does at ReportFraud.ftc.gov.
Informational only. Not legal, tax, or financial advice, and not affiliated with any settlement.
RecordingLaw.com is an independent legal-information publisher. We are not a law firm, not a settlement administrator, and not affiliated with, endorsed by, or acting on behalf of any court, government agency, defendant, or claims administrator described on this page. Reading this page does not create an attorney-client relationship.
We do not process claims and we never collect your claim information. You cannot file a claim on RecordingLaw.com. To file, opt out, object, or check your status, use only the official settlement administrator identified above. We link to it for your convenience.
Filing a legitimate claim is free. No legitimate settlement or administrator will charge you a fee to file, or ask for your Social Security number, bank, or card details by unsolicited call, text, or email. If someone does, it is likely a scam. Report it at ReportFraud.ftc.gov.
Deadlines, amounts, and approval status change and are set by the court. We verify against the official administrator and court records, but confirm the current details on the official site before acting. Nothing here guarantees eligibility, a payment, or any amount. Settlement payments may be taxable. See IRS Publication 4345. and consult a tax professional. For advice about your specific situation, consult a licensed attorney in your state. Affiliate disclosure.
Sources and References
- United States District Court, District of Massachusetts (official court site)(mad.uscourts.gov).gov
- Breach Portal: Notice to the Secretary of HHS Breach of Unsecured Protected Health Information, U.S. Department of Health and Human Services, Office for Civil Rights(ocrportal.hhs.gov).gov
- IdentityTheft.gov, Federal Trade Commission(identitytheft.gov).gov
- Credit Freezes and Fraud Alerts, Consumer Advice, Federal Trade Commission(consumer.ftc.gov).gov
- Clarkson, et al. v. Onsite Mammography, LLC, d/b/a Onsite Women's Health, official settlement site(onsitesettlement.com)
- Frequently Asked Questions, Onsite Mammography Data Breach Settlement (official)(onsitesettlement.com)