Onsite Mammography data breach
If you got a notice that Onsite Mammography (Onsite Women's Health) had your personal or health information exposed in an October 2024 breach, you can file a claim by August 11, 2026 for a cash payment and/or credit and medical data monitoring. You need to submit a claim form — nothing happens automatically.
All individuals residing in the United States whose Private Information may have been impacted by the October 2024 data breach incident and received written notice. Excludes defendant officers/directors, judges, opted-out members, and those with previously settled claims. Payout: Settlement Class Members may be eligible to receive a Cash Payment, including Reimbursement for Out-of-Pocket Losses and a Pro Rata Cash Payment; they may also elect to receive Credit and Medical/Healthcare Data Monitoring and Insurance Services. No dollar caps or payout estimates are shown in the provided source text. Proof of purchase is required to file. Claim deadline: August 11, 2026. Checked against the official settlement source by SettleSignal on June 13, 2026.
Who may qualify
You self-certify the basics when you file — the settlement administrator makes the final eligibility decision.
You're covered if you live in the US and received written notice that your private information (personal or health records) may have been exposed when an unauthorized third party accessed an Onsite Mammography employee's email account in October 2024. Officers and directors of Onsite, judges on the case, anyone who already settled separately, and anyone who opts out are excluded.
Official eligibility wording (read the exact text)
All individuals residing in the United States whose Private Information may have been impacted by the October 2024 data breach incident and received written notice. Excludes defendant officers/directors, judges, opted-out members, and those with previously settled claims.
This summary is based on available official settlement sources. The settlement administrator determines eligibility and payment approval.
New to the terms? Plain-English: claim deadline, proof of purchase, administrator, pro rata.
Proof requirements
Proof requirement is currently marked as Yes.
Review the official claim form before submitting any information.
Important dates
How hard is this claim to file?
What the form asks
- Identity / Class Member Verification — Your name, address, and contact details as a US resident whose private information was affected by the breach. (Your notification letter from Onsite Mammography. Use the exact name and address from that letter to avoid mismatches.)
- Benefit Election — Choose either (a) Reimbursement for Out-of-Pocket Losses plus a cash payment, or (b) Credit and Medical/Healthcare Data Monitoring and Insurance Services. (Both options are described in plain language at https://www.onsitesettlement.com/faqs/#Question8. Read it before you decide.)
Documents you'll need
- Receipts or records documenting out-of-pocket losses caused by the data incident
- Written notice received from Onsite Mammography (required)
Watch out for
- August 11, 2026 is the hard deadline. File late and you lose both the cash payment and the credit monitoring.
- Want to keep your right to sue Onsite separately? You must opt out by July 13, 2026.
- No per-person dollar figure is published in the settlement materials. The cash payment is divided among all valid claimants, so the final number depends on how many people file.
- Only people who received written notice qualify. If you never got a letter, contact the settlement administrator before filing.
We prepare — you file on the official site yourself. This is not legal advice and is not an eligibility decision; the administrator and court decide.
How do I file a claim for this settlement?
This record no longer has an open public claim form — confirm the current status and any next steps on the official source.
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1Check that you received a written notice saying your private information may have been caught up in the October 2024 Onsite Mammography incident. That letter is what makes you a class member.
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2Head to the official claim portal at https://onsitesettlement.pnclassaction.com to file online, or download the Mail-In Claim Form from the Court Documents page if you prefer paper.
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3Pick your benefit: either (a) reimbursement for out-of-pocket losses plus a cash payment, or (b) Credit and Medical/Healthcare Data Monitoring and Insurance Services.
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4If you're going with the out-of-pocket losses option, pull together receipts or records showing what you spent because of the breach before you submit.
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5Get your claim in online or postmark your mail-in form no later than August 11, 2026.
New to settlement claims? How to file safely → · Worried it might be fake? Run the 60-second legitimacy check →
When will I get paid?
- Claims open You are here
- Court approval
- Payments sent
- Distribution complete
Claims are still being accepted. Class-action payouts typically begin only after the claim deadline, final court approval, and any appeals.
Verify it yourself
How we verified this record
Optional, but it's the whole point — every field below traces to a named official source we re-check on a schedule.
- Claim deadline the official settlement website · Jun 13, 2026
- Payout details the official settlement website · Jun 13, 2026
- Proof requirement the official settlement website · Jun 13, 2026
- Official claim link the official settlement website · Jun 13, 2026
- Court case the official settlement website · Jun 13, 2026
- Eligibility queued for re-check
- Administrator queued for re-check
- Payment status queued for re-check
Every published record clears our source-verification bar; remaining fields are checked one by one on our weekly re-verification pass.
Cross-checked against 3 official sources on file.
Checked fields are matched against a named official source and re-checked on a schedule. We show the authority and the date, never our internal evidence link.
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Claim deadline
August 11, 2026
Verified Jun 13, 2026 · against the official settlement website
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Proof requirement
Yes
Verified Jun 13, 2026 · against the official settlement website
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Estimated payout
Settlement Class Members may be eligible to receive a Cash Payment, including Reimbursement for Out-of-Pocket Losses and a Pro Rata Cash Payment; they may also elect to receive Credit and Medical/Healthcare Data Monitoring and Insurance Services. No dollar caps or payout estimates are shown in the provided source text.
Verified Jun 13, 2026 · against the official settlement website
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Court
United States District Court, District of Massachusetts
Verified Jun 13, 2026 · against the official settlement website
Show all 5 more verified fields
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Official claim URL
onsitesettlement.pnclassaction.com
Verified Jun 13, 2026 · against the official settlement website
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Objection deadline
July 13, 2026
Verified Jun 13, 2026 · against the official settlement website
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Opt-out deadline
July 13, 2026
Verified Jun 13, 2026 · against the official settlement website
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Court case number
3:25-CV-11123-MGM
Verified Jun 13, 2026 · against the official settlement website
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Case name
Clarkson, et al. v. Onsite Mammography, LLC, d/b/a Onsite Women’s Health
Verified Jun 13, 2026 · against the official settlement website
The Hon. Mark G. Mastroianni is overseeing this case captioned as Clarkson, et al. v. Onsite Mammography, LLC, d/b/a Onsite Women’s Health, Case No. 3:25-cv-11123-MGM.
Common questions
Is the Onsite Mammography data breach settlement legitimate?
Yes — the Onsite Mammography data breach settlement is a real claims process that SettleSignal tracks from its official source. It is administered by Eisner Advisory Group LLC under case 3:25-CV-11123-MGM in United States District Court, District of Massachusetts. File only through the official settlement website (www.onsitesettlement.com); a genuine settlement administrator never charges a fee to file. SettleSignal last checked this record against the official source on June 13, 2026. Always confirm the current details on the official site before filing.
Who may qualify for this settlement?
All individuals residing in the United States whose Private Information may have been impacted by the October 2024 data breach incident and received written notice. Excludes defendant officers/directors, judges, opted-out members, and those with previously settled claims.
How much can I get from the Onsite Mammography data breach settlement?
Settlement Class Members may be eligible to receive a Cash Payment, including Reimbursement for Out-of-Pocket Losses and a Pro Rata Cash Payment; they may also elect to receive Credit and Medical/Healthcare Data Monitoring and Insurance Services. No dollar caps or payout estimates are shown in the provided source text. The exact amount you may receive is decided by the settlement administrator based on your valid claim and is not guaranteed; a total settlement-fund figure is shared among all eligible claimants, not paid to each person.
What is the claim deadline?
The claim deadline is August 11, 2026. Confirm the current deadline on the official settlement source before filing.
Do I need proof to claim?
Proof requirement: Yes. The settlement administrator determines what documentation, if any, is required.
Where is the official Onsite Mammography data breach claim form?
The official claim form is hosted by the settlement administrator, Eisner Advisory Group LLC. Use the 'Open official claim form' button on this page — never pay a fee to file.
How do I know if I'm included?
If you received a written notice from Onsite Mammography or Onsite Women's Health about the October 2024 breach, you're likely in the class. The notice is your key signal.
What exactly was exposed?
A third party got into one Onsite employee's email account. Files in that account may have included personally identifiable information (PII) and protected health information (PHI) belonging to patients and others in the class.
What can I get from this settlement?
You can choose between a cash payment (reimbursement for documented losses plus a share of the remaining fund), or credit monitoring and medical/healthcare data monitoring with insurance services. The cash amount per person isn't set yet — it depends on total valid claims.
What happens if I don't file?
If you do nothing, you won't receive any cash payment or monitoring services, and you'll give up your right to sue Onsite separately over this breach. Filing a claim is the only way to get a benefit.
Can I opt out entirely?
Yes. If you opt out by July 13, 2026, you keep your right to bring your own lawsuit against Onsite for this incident, but you won't get any settlement benefits. The final approval hearing is scheduled for September 9, 2026 at 12:00 PM ET.
Where to act
When you are ready, you open the official claim form yourself. SettleSignal does not file claims or determine eligibility.
You'll need the Claim ID from your notice
The official claim form asks for the Claim ID (or Notice ID) the settlement mailed or emailed to the people it identified. Didn't get one? Here's how to get it:
- Check your email (including spam) and any mail from around when the settlement was announced — the Claim ID is usually printed right on the notice.
- Still can't find it? Contact the settlement administrator (Eisner Advisory Group LLC), tell them you believe you're a class member (for example, a customer or patient in the covered period), and ask them to look you up and send your Claim ID.
Not ready to file today? Track it free — we'll remind you 30, 14, 7, and 1 day before Aug 11, 2026, and keep your claim details in one place.
Listed on the official settlement website (Eisner Advisory Group LLC).
Status history
Every status and verification change we have recorded for this settlement, newest first. We log the date we made each change; we never publish the underlying evidence link.
- Verified field details updated from an official source. ×2
- Settlement published after verification.
Disclaimer
SettleSignal summarizes publicly available settlement information and links to official settlement sources. We are not a law firm, do not provide legal advice, do not submit claims on your behalf, and do not determine eligibility or payout approval. You open the official claim form yourself. Only file a claim if the information you provide is accurate.
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