HHS OCR report ยท 2020
Tandem Diabetes Care, Inc. data breach
OCR report facts
- Covered entity
- Tandem Diabetes Care, Inc.
- Entity type
- Healthcare Provider
- State
- California
- Individuals affected
- 140,781
- Submission date
- Mar 17, 2020
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Business associate present
- No
- Status
- Archive (closed)
OCR description
The covered entity (CE), Tandem Diabetes Care, Inc., reported that it was the victim of a cyber-attack involving the electronic protected health information (ePHI) of 140,781 individuals. The ePHI involved included names, dates of birth, addresses, Social Security numbers, diagnoses, medications prescribed, and other treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice on its website. The CE also provided complimentary identity and credit...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Tandem Diabetes Care, Inc. data breach?
The report to HHS OCR lists 140,781 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Mar 17, 2020.
What type of breach was it?
The OCR portal lists the type of breach as Hacking/IT Incident, with the breached information located in: Email.
Is the investigation still open?
No. The report is in the OCR portal archive, which holds reports where OCR has closed its review.
Is a breach notice letter from Tandem Diabetes Care, Inc. legitimate?
This site cannot verify letters. Check the sender against the organisation's official website and the HHS OCR breach portal, and avoid calling numbers or clicking links only listed in an unexpected message. See our guide on what to do after a data breach notice.
Source: HHS OCR Breach Portal, OCR export October 2026. Network USA is not affiliated with HHS or Tandem Diabetes Care, Inc..